DSPIC33FJ32MC204T-I/PT

dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304

Data Sheet

High-Performance,

16-bit Microcontrollers

Preliminary

DS70283B

Note the following details of the code protection feature on Microchip devices:

•

Microchip products meet the specification contained in their particular Microchip Data Sheet.

•

Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the

intended manner and under normal conditions.

•

There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our

knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data

Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

•

Microchip is willing to work with the customer who is concerned about the integrity of their code.

Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not

mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our

products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts

allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device

applications and the like is provided only for your convenience

and may be superseded by updates. It is your responsibility to

ensure that your application meets with your specifications.

MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR

IMPLIED, WRITTEN OR ORAL, STATUTORY OR

OTHERWISE, RELATED TO THE INFORMATION,

INCLUDING BUT NOT LIMITED TO ITS CONDITION,

QUALITY, PERFORMANCE, MERCHANTABILITY OR

FITNESS FOR PURPOSE. Microchip disclaims all liability

arising from this information and its use. Use of Microchip

devices in life support and/or safety applications is entirely at

the buyer’s risk, and the buyer agrees to defend, indemnify and

hold harmless Microchip from any and all damages, claims,

suits, or expenses resulting from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron,

dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC,

PICmicro, PICSTART, PRO MATE, rfPIC and SmartShunt are

registered trademarks of Microchip Technology Incorporated

in the U.S.A. and other countries.

AmpLab, FilterLab, Linear Active Thermistor, Migratable

Memory, MXDEV, MXLAB, SEEVAL, SmartSensor and The

Embedded Control Solutions Company are registered

trademarks of Microchip Technology Incorporated in the

U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard,

dsPICDEM, dsPICDEM.net, dsPICworks, ECAN,

ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,

In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi,

MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit,

PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal,

PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select

Mode, Smart Serial, SmartTel, Total Endurance, UNI/O,

WiperLock and ZENA are trademarks of Microchip

Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated

in the U.S.A.

All other trademarks mentioned herein are property of their

respective companies.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 certification for its worldwide

headquarters, design and wafer fabrication facilities in Chandler and

Tempe, Arizona; Gresham, Oregon and design centers in California

and India. The Company’s quality system processes and procedures

are for its PIC^®MCUs and dsPIC^®DSCs, KEELOQ^®code hopping

devices, Serial EEPROMs, microperipherals, nonvolatile memory and

analog products. In addition, Microchip’s quality system for the design

and manufacture of development systems is ISO 9001:2000 certified.

DS70283B-page ii

Preliminary

dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304

High-Performance, 16-Bit Digital Signal Controllers

Operating Range:

Interrupt Controller:

• Up to 40 MIPS operation (@ 3.0-3.6V):

• 5-cycle latency

- Industrial temperature range

(-40°C to +85°C)

• 118 interrupt vectors

• Up to 26 available interrupt sources

• Up to 3 external interrupts

• 7 programmable priority levels

• 4 processor exceptions

- Extended temperature range

(-40°C to +125°C)

High-Performance DSC CPU:

Digital I/O:

• Modified Harvard architecture

• C compiler optimized instruction set

• 16-bit wide data path

• Peripheral pin Select functionality

• Up to 35 programmable digital I/O pins

• Wake-up/Interrupt-on-Change for up to 21 pins

• Output pins can drive from 3.0V to 3.6V

• Up to 5V output with open drain configuration

• All digital input pins are 5V tolerant

• 4 mA sink on all I/O pins

• 24-bit wide instructions

• Linear program memory addressing up to 4M

instruction words

• Linear data memory addressing up to 64 Kbytes

• 83 base instructions: mostly 1 word/1 cycle

• Two 40-bit accumulators with rounding and

saturation options

On-Chip Flash and SRAM:

• Flexible and powerful addressing modes:

- Indirect

• Flash program memory (up to 32 Kbytes)

• Data SRAM (2 Kbytes)

- Modulo

• Boot and General Security for program Flash

- Bit-reversed

• Software stack

System Management:

• 16 x 16 fractional/integer multiply operations

• 32/16 and 16/16 divide operations

• Single-cycle multiply and accumulate:

- Accumulator write back for DSP operations

- Dual data fetch

• Flexible clock options:

- External, crystal, resonator, internal RC

- Fully integrated Phase-Locked Loop (PLL)

- Extremely low jitter PLL

• Up to ±16-bit shifts for up to 40-bit data

• Power-up Timer

• Oscillator Start-up Timer/Stabilizer

• Watchdog Timer with its own RC oscillator

• Fail-Safe Clock Monitor

Timers/Capture/Compare/PWM:

• Timer/Counters, up to three 16-bit timers

- Can pair up to make one 32-bit timer

• Reset by multiple sources

- 1 timer runs as Real-Time Clock with external

32.768 kHz oscillator

Power Management:

- Programmable prescaler

• On-chip 2.5V voltage regulator

• Input Capture (up to 4 channels):

- Capture on up, down or both edges

- 16-bit capture input functions

- 4-deep FIFO on each capture

• Output Compare (up to 2 channels):

- Single or Dual 16-Bit Compare mode

- 16-bit Glitchless PWM mode

• Switch between clock sources in real time

• Idle, Sleep and Doze modes with fast wake-up

Preliminary

DS70283B-page 1

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Motor Control Peripherals:

CMOS Flash Technology:

• 6-channel 16-bit Motor Control PWM:

- 3 duty cycle generators

• Low-power, high-speed Flash technology

• Fully static design

- Independent or Complementary mode

- Programmable dead time and output polarity

- Edge-aligned or center-aligned

- Manual output override control

- 1 Fault input

• 3.3V (±10%) operating voltage

• Industrial and Extended temperature

• Low power consumption

Communication Modules:

- Trigger for ADC conversions

• 4-wire SPI:

- PWM frequency for 16-bit resolution

(@ 40 MIPS) = 1220 Hz for Edge-Aligned

mode, 610 Hz for Center-Aligned mode

- Framing supports I/O interface to simple

codecs

- Supports 8-bit and 16-bit data

- PWM frequency for 11-bit resolution

(@ 40 MIPS) = 39.1 kHz for Edge-Aligned

mode, 19.55 kHz for Center-Aligned mode

- Supports all serial clock formats and

sampling modes

• I²C™:

• 2-channel 16-bit Motor Control PWM:

- 1 duty cycle generator

- Full Multi-Master Slave mode support

- 7-bit and 10-bit addressing

- Bus collision detection and arbitration

- Integrated signal conditioning

- Slave address masking

- Independent or Complementary mode

- Programmable dead time and output polarity

- Edge-aligned or center-aligned

- Manual output override control

- 1 Fault input

• UART:

- Interrupt on address bit detect

- Interrupt on UART error

- Trigger for ADC conversions

- PWM frequency for 16-bit resolution

(@ 40 MIPS) = 1220 Hz for Edge-Aligned

mode, 610 Hz for Center-Aligned mode

- Wake-up on Start bit from Sleep mode

- 4-character TX and RX FIFO buffers

- LIN bus support

- PWM frequency for 11-bit resolution

(@ 40 MIPS) = 39.1 kHz for Edge-Aligned

mode, 19.55 kHz for Center-Aligned mode

- IrDA^®encoding and decoding in hardware

- High-Speed Baud mode

• Quadrature Encoder Interface module:

- Phase A, Phase B and index pulse input

- 16-bit up/down position counter

- Hardware Flow Control with CTS and RTS

Packaging:

- Count direction status

• 28-pin SDIP/SOIC/QFN-S

• 44-pin QFN/TQFP

- Position Measurement (x2 and x4) mode

- Programmable digital noise filters on inputs

- Alternate 16-bit Timer/Counter mode

- Interrupt on position counter rollover/underflow

Note:

See the device variant tables for exact

peripheral features per device.

Analog-to-Digital Converters (ADCs):

• 10-bit, 1.1 Msps or 12-bit, 500 Ksps conversion:

- 2 and 4 simultaneous samples (10-bit ADC)

- Up to 9 input channels with auto-scanning

- Conversion start can be manual or

synchronized with 1 of 4 trigger sources

- Conversion possible in Sleep mode

- ±2 LSb max integral nonlinearity

- ±1 LSb max differential nonlinearity

DS70283B-page 2

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 PRODUCT

FAMILIES

The device names, pin counts, memory sizes and

peripheral availability of each device are listed below.

The following pages show their pinout diagrams.

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 Controller Families

Remappable Peripherals

Program

Flash

Memory (Kbyte)

(Kbyte)

RAM

Device

Pins

(1)

(2)

16

SDIP

SOIC

QFN-S

dsPIC33FJ32MC202 28

32

2

3

4

2

6ch

2ch

1

1ADC,

6 ch

1

21

(1)

(2)

26

dsPIC33FJ32MC204 44

dsPIC33FJ16MC304 44

32

16

2

3

4

2

6ch

2ch

1

1ADC,

9 ch

1

35 QFN

TQFP

(2)

6ch

2ch

1ADC,

9 ch

35 QFN

TQFP

Note 1: Only 2 out of 3 timers are remappable.

2: Only PWM fault inputs are remappable.

Preliminary

DS70283B-page 3

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Pin Diagrams

28-PIN SDIP, SOIC

MCLR

AN0/VREF+/CN2/RA0

1

2

3

4

5

28

27

26

25

24

AVDD

AVSS

AN1/VREF-/CN3/RA1

PWM1L1/RP15/CN11/RB15

PWM1H1/RP14/CN12/RB14

PWM1L2/RP13/CN13/RB13

PWM1H2/RP12/CN14/RB12

PGC2/EMUC2/TMS/PWM1L3/RP11/CN15/RB11

PGD2/EMUD2/TDI/PWM1H3/RP10/CN16/RB10

VCAP/VDDCORE

PGD1/EMUD1/AN2/C2IN-/RP0/CN4/RB0

PGC1/EMUC1/AN3/C2IN+/RP1/CN5/RB1

AN4/RP2/CN6/RB2

6

7

8

23

22

21

AN5/RP3/CN7/RB3

VSS

OSCI/CLKI/CN30/RA2

9

20

19

18

17

16

15

OSCO/CLKO/CN29/RA3

SOSCI/RP4/CN1/RB4

VSS

10

11

12

13

14

TDO/PWM2L1/SDA1/RP9/CN21/RB9

TCK/PWM2H1/SCL1/RP8/CN22/RB8

INT0/RP7/CN23/RB7

SOSCO/T1CK/CN0/RA4

VDD

PGD3/EMUD3/ASDA1/RP5/CN27/RB5

PGC3/EMUC3/ASCL1/RP6/CN24/RB6

28-Pin QFN-S

28 27 26 25 24 23 22

PGED1/EMUD1/AN2/C2IN-/RP0/CN4/RB0

PGEC1/EMUC1/AN3/C2IN+/RP1/CN5/RB1

AN4/RP2/CN6/RB2

PWM1L2/RP13/CN13/RB13

21

PWM1H2/RP12/CN14/RB12

20

PGEC2/EMUC2/TMS/PWM1L3/RP11/CN15/RB11

19

1

2

3

4

5

6

7

dsPIC33FJ32MC202

AN5/RP3/CN7/RB3

VSS

PGED2/EMUD2/TDI/PWM1H3/RP10/CN16/RB10

18

VCAP/VDDCORE

17

OSCI/CLKI/CN30/RA2

VSS

16

OSCO/CLKO/CN29/RA3

TDO/PWM2L1/SDA1/RP9/CN21/RB9

15

8

9 10 11 12 13 14

DS70283B-page 4

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Pin Diagrams (Continued)

44-Pin QFN

22 21 20 19 18 17 16 15 14 13 12

AN4/RP2/CN6/RB2

PWM1L2/RP13/CN13/RB13

PWM1H2/RP12/CN14/RB12

PGEC2/EMUC2/PWM1L3/RP11/CN15/RB11

PGED2/EMUD2/PWM1H3/RP10/CN16/RB10

VCAP/VDDCORE

23

24

25

26

27

28

29

30

31

32

33

11

10

9

AN5/RP3/CN7/RB3

AN6/RP16/CN8/RC0

AN7/RP17/CN9/RC1

AN8/RP18/CN10/RC2

VDD

8

7

dsPIC33FJ32MC204

dsPIC33FJ16MC304

VSS

6

VSS

RP25/CN19/RC9

5

OSCI/CLKI/CN30/RA2

OSCO/CLKO/CN29/RA3

TDO/RA8

RP24/CN20/RC8

4

PWM2L1/RP23/CN17/RC7

PWM2H1/RP22/CN18/RC6

SDA1/RP9/CN21/RB9

3

2

SOSCI/RP4/CN1/RB4

1

34 35 36 37 38 39 40 41 42 43 44

Preliminary

DS70283B-page 5

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Pin Diagrams (Continued)

44-Pin TQFP

11

10

AN4/RP2/CN6/RB2

AN5/RP3/CN7/RB3

AN6/RP16/CN8/RC0

AN7/RP17/CN9/RC1

AN8/RP18/CN10/RC2

VDD

PWM1L2/RP13/CN13/RB13

PWM1H2/RP12/CN14/RB12

PGEC2/EMUC2/PWM1L3/RP11/CN15/RB11

PGED2/EMUD2/PWM1H3/RP10/CN16/RB10

VCAP/VDDCORE

23

24

25

9

8

7

6

5

4

3

2

1

26

27

dsPIC33FJ32MC204

dsPIC33FJ16MC304

VSS

28

29

30

31

32

33

RP25/CN19/RC9

VSS

RP24/CN20/RC8

OSCI/CLKI/CN30/RA2

OSCO/CLKO/CN29/RA3

TDO/RA8

PWM2L1/RP23/CN17/RC7

PWM2H1/RP22/CN18/RC6

SDA1/RP9/CN21/RB9

SOSCI/RP4/CN1/RB4

DS70283B-page 6

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Table of Contents

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 Product Families.................................................................................................. 3

1.0 Device Overview .......................................................................................................................................................................... 9

2.0 CPU............................................................................................................................................................................................ 13

3.0 Memory Organization................................................................................................................................................................. 25

4.0 Flash Program Memory.............................................................................................................................................................. 51

5.0 Resets ....................................................................................................................................................................................... 57

6.0 Interrupt Controller ..................................................................................................................................................................... 63

7.0 Oscillator Configuration.............................................................................................................................................................. 95

8.0 Power-Saving Features............................................................................................................................................................ 105

9.0 I/O Ports ................................................................................................................................................................................... 107

10.0 Timer1 ...................................................................................................................................................................................... 133

11.0 Timer2/3 feature ...................................................................................................................................................................... 135

12.0 Input Capture............................................................................................................................................................................ 141

13.0 Output Compare....................................................................................................................................................................... 143

14.0 Motor Control PWM Module..................................................................................................................................................... 147

15.0 Quadrature Encoder Interface (QEI) Module ........................................................................................................................... 169

16.0 Serial Peripheral Interface (SPI)............................................................................................................................................... 177

2

17.0 Inter-Integrated Circuit (I C)..................................................................................................................................................... 185

18.0 Universal Asynchronous Receiver Transmitter (UART)........................................................................................................... 195

19.0 10-bit/12-bit Analog-to-Digital Converter (ADC)....................................................................................................................... 203

20.0 Special Features ...................................................................................................................................................................... 217

21.0 Instruction Set Summary.......................................................................................................................................................... 225

22.0 Development Support............................................................................................................................................................... 233

23.0 Electrical Characteristics.......................................................................................................................................................... 237

24.0 Packaging Information.............................................................................................................................................................. 275

Appendix A: Revision History............................................................................................................................................................. 281

Index ................................................................................................................................................................................................. 283

The Microchip Web Site..................................................................................................................................................................... 287

Customer Change Notification Service .............................................................................................................................................. 287

Customer Support.............................................................................................................................................................................. 287

Reader Response.............................................................................................................................................................................. 288

Product Identification System ............................................................................................................................................................ 289

TO OUR VALUED CUSTOMERS

It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip

products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and

enhanced as new volumes and updates are introduced.

If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via

E-mail at docerrors@microchip.com or fax the Reader Response Form in the back of this data sheet to (480) 792-4150. We

welcome your feedback.

Most Current Data Sheet

To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:

http://www.microchip.com

You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.

The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).

Errata

An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current

devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision

of silicon and revision of document to which it applies.

To determine if an errata sheet exists for a particular device, please check with one of the following:

•

Microchip’s Worldwide Web site; http://www.microchip.com

Your local Microchip sales office (see last page)

When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are

using.

Customer Notification System

Register on our web site at www.microchip.com to receive the most current information on all of our products.

Preliminary

DS70283B-page 7

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 8

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

1.0

DEVICE OVERVIEW

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual” . Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

This document contains device specific information for

the following Digital Signal Controller (DSC) devices:

• dsPIC33FJ32MC202

• dsPIC33FJ32MC204

• dsPIC33FJ16MC304

The dsPIC33F devices contain extensive Digital Signal

Processor (DSP) functionality with a high performance

16-bit microcontroller (MCU) architecture.

Figure 1-1 shows a general block diagram of the core

and peripheral modules in the dsPIC33FJ32MC202/

204 and dsPIC33FJ16MC304 family of devices.

Table 1-1 lists the functions of the various pins shown

in the pinout diagrams.

Preliminary

DS70283B-page 9

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 1-1:

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 BLOCK DIAGRAM

PSV & Table

Data Access

Control Block

Y Data Bus

X Data Bus

Interrupt

Controller

PORTA

PORTB

16

8

16

Data Latch

X RAM

23

PCH PCL

Program Counter

Y RAM

PCU

23

Address

Latch

Address

Latch

Loop

Control

Logic

Stack

Control

Logic

16

23

16

Remappable

Pins

Address Generator Units

Address Latch

Program Memory

Data Latch

EA MUX

Address Bus

ROM Latch

24

16

Instruction

Decode &

Control

Instruction Reg

16

Control Signals

to Various Blocks

DSP Engine

16 x 16

W Register Array

Power-up

Timer

Timing

Generation

OSC2/CLKO

OSC1/CLKI

Divide Support

16

Oscillator

Start-up Timer

FRC/LPRC

Oscillators

Power-on

Reset

16-bit ALU

Precision

Band Gap

Reference

Watchdog

Timer

16

Brown-out

Reset

Voltage

Regulator

VDDCORE/VCAP

VDD, VSS

MCLR

OC/

PWM1-2

PWM

2 Ch

Timers

1-3

UART1

ADC1

PWM

6 Ch

IC1,2,7,8

QEI

CNx

I2C1

Note:

Not all pins or features are implemented on all device pinout configurations. See pinout diagrams for the specific pins

and features present on each device.

DS70283B-page 10

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 1-1:

PINOUT I/O DESCRIPTIONS

Type

Buffer

Type

Pin Name

Description

AN0-AN8

I

Analog

Analog input channels.

CLKI

I

ST/CMOS External clock source input. Always associated with OSC1 pin function.

CLKO

O

—

Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode.

Optionally functions as CLKO in RC and EC modes. Always associated with OSC2

pin function.

OSC1

OSC2

I

ST/CMOS Oscillator crystal input. ST buffer when configured in RC mode; CMOS otherwise.

I/O

—

Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode.

Optionally functions as CLKO in RC and EC modes.

SOSCI

I

ST/CMOS 32.768 kHz low-power oscillator crystal input; CMOS otherwise.

SOSCO

O

—

32.768 kHz low-power oscillator crystal output.

CN0-CN30

I

ST

Change notification inputs.

Can be software programmed for internal weak pull-ups on all inputs.

IC1-IC2

IC7-IC8

I

ST

Capture inputs 1/2

Capture inputs 7/8.

OCFA

OC1-OC2

I

O

ST

—

Compare Fault A input (for Compare Channels 1 and 2).

Compare outputs 1 through 2.

INT0

INT1

INT2

I

ST

External interrupt 0.

External interrupt 1.

External interrupt 2.

RA0-RA4

I/O

ST

PORTA is a bidirectional I/O port.

RA7-RA15

RB0-RB15

RC0-RC9

I/O

ST

PORTB is a bidirectional I/O port.

PORTC is a bidirectional I/O port.

T1CK

T2CK

T3CK

I

ST

Timer1 external clock input.

Timer2 external clock input.

Timer3 external clock input.

U1CTS

U1RTS

U1RX

U1TX

I

O

I

ST

—

ST

—

UART1 clear to send.

UART1 ready to send.

UART1 receive.

O

UART1 transmit.

SCK1

SDI1

SDO1

SS1

I/O

I

O

ST

—

Synchronous serial clock input/output for SPI1.

SPI1 data in.

SPI1 data out.

I/O

ST

SPI1 slave synchronization or frame pulse I/O.

SCL1

SDA1

ASCL1

ASDA1

I/O

ST

Synchronous serial clock input/output for I2C1.

Synchronous serial data input/output for I2C1.

Alternate synchronous serial clock input/output for I2C1.

Alternate synchronous serial data input/output for I2C1.

TMS

TCK

TDI

I

ST

—

JTAG Test mode select pin.

JTAG test clock input pin.

JTAG test data input pin.

JTAG test data output pin.

TDO

O

INDX

QEA

I

ST

Quadrature Encoder Index Pulse input.

Quadrature Encoder Phase A input in QEI mode.

Auxiliary Timer External Clock/Gate input in Timer mode.

Quadrature Encoder Phase A input in QEI mode.

Auxiliary Timer External Clock/Gate input in Timer mode.

Position Up/Down Counter Direction State.

QEB

I

ST

UPDN

O

CMOS

Legend: CMOS = CMOS compatible input or output; Analog = Analog input

ST = Schmitt Trigger input with CMOS levels; O = Output; I = Input; P = Power

Preliminary

DS70283B-page 11

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 1-1:

PINOUT I/O DESCRIPTIONS (CONTINUED)

Type

Buffer

Type

Pin Name

Description

I

ST

—

ST

—

PWM1 Fault A input.

PWM1 Low output 1

PWM1 High output 1

PWM1 Low output 2

PWM1 High output 2

PWM1 Low output 3

PWM1 High output 3

PWM2 Fault A input.

PWM2 Low output 1

PWM2 High output 1

FLTA1

O

I

PWM1L1

PWM1H1

PWM1L2

PWM1H2

PWM1L3

PWM1H3

FLTA2

O

PWM2L1

PWM2H1

PGD1/EMUD1

PGC1/EMUC1

PGD2/EMUD2

PGC2/EMUC2

PGD3/EMUD3

PGC3/EMUC3

I/O

ST

Data I/O pin for programming/debugging communication channel 1.

Clock input pin for programming/debugging communication channel 1.

Data I/O pin for programming/debugging communication channel 2.

Clock input pin for programming/debugging communication channel 2.

Data I/O pin for programming/debugging communication channel 3.

Clock input pin for programming/debugging communication channel 3.

I

I/O

I

I/O

I

MCLR

AVDD

AVSS

VDD

I/P

P

I

ST

P

Master Clear (Reset) input. This pin is an active-low Reset to the device.

Positive supply for analog modules.

P

Ground reference for analog modules.

—

Positive supply for peripheral logic and I/O pins.

CPU logic filter capacitor connection.

VDDCORE

VSS

—

Ground reference for logic and I/O pins.

Analog voltage reference (high) input.

VREF+

VREF-

Analog

I

Analog voltage reference (low) input.

Legend: CMOS = CMOS compatible input or output; Analog = Analog input

ST = Schmitt Trigger input with CMOS levels; O = Output; I = Input; P = Power

DS70283B-page 12

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

2.1

Data Addressing Overview

2.0

CPU

The data space can be addressed as 32K words or

64 Kbytes and is split into two blocks, referred to as X

and Y data memory. Each memory block has its own

independent Address Generation Unit (AGU). The

MCU class of instructions operates solely through the

X memory AGU, which accesses the entire memory

map as one linear data space. Certain DSP instructions

operate through the X and Y AGUs to support dual

operand reads, which splits the data address space

into two parts. The X and Y data space boundary is

device-specific.

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

The

dsPIC33FJ32MC202/204

and

Overhead-free circular buffers (Modulo Addressing

mode) are supported in both X and Y address spaces.

The Modulo Addressing removes the software

boundary checking overhead for DSP algorithms.

Furthermore, the X AGU circular addressing can be

used with any of the MCU class of instructions. The X

AGU also supports Bit-Reversed Addressing to greatly

simplify input or output data reordering for radix-2 FFT

algorithms.

dsPIC33FJ16MC304 CPU module has a 16-bit (data)

modified Harvard architecture with an enhanced

instruction set, including significant support for DSP.

The CPU has a 24-bit instruction word with a variable

length opcode field. The Program Counter (PC) is

23 bits wide and addresses up to 4M x 24 bits of user

program memory space. The actual amount of program

memory implemented varies by device. A single-cycle

instruction prefetch mechanism is used to help main-

tain throughput and provides predictable execution. All

instructions execute in a single cycle, with the excep-

tion of instructions that change the program flow, the

double-word move (MOV.D) instruction and the table

instructions. Overhead-free program loop constructs

are supported using the DO and REPEAT instructions,

both of which are interruptible at any point.

The upper 32 Kbytes of the data space memory map

can optionally be mapped into program space at any

16K program word boundary defined by the 8-bit

Program Space Visibility Page (PSVPAG) register. The

program-to-data-space mapping feature lets any

instruction access program space as if it were data

space.

The

dsPIC33FJ32MC202/204

and

2.2

DSP Engine Overview

dsPIC33FJ16MC304 devices have sixteen, 16-bit

working registers in the programmer’s model. Each of

the working registers can serve as a data, address or

address offset register. The 16th working register

(W15) operates as a software Stack Pointer (SP) for

interrupts and calls.

The DSP engine features a high-speed 17-bit by 17-bit

multiplier, 40-bit ALU, two 40-bit saturating

a

accumulators and a 40-bit bidirectional barrel shifter.

The barrel shifter is capable of shifting a 40-bit value up

to 16 bits right or left, in a single cycle. The DSP instruc-

tions operate seamlessly with all other instructions and

have been designed for optimal real-time performance.

The MAC instruction and other associated instructions

can concurrently fetch two data operands from memory

while multiplying two W registers and accumulating and

optionally saturating the result in the same cycle. This

instruction functionality requires that the RAM data

space be split for these instructions and linear for all

others. Data space partitioning is achieved in a trans-

parent and flexible manner through dedicating certain

working registers to each address space.

There are two classes of instruction in the

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices: MCU and DSP. These two instruction classes

are seamlessly integrated into a single CPU. The

instruction set includes many addressing modes and is

designed for optimum C compiler efficiency. For most

instructions, the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 is capable of executing a data (or

program data) memory read, a working register (data)

read, a data memory write and a program (instruction)

memory read per instruction cycle. As a result, three

parameter instructions can be supported, allowing

A + B = C operations to be executed in a single cycle.

A block diagram of the CPU is shown in Figure 2-1, and

the programmer’s model for the dsPIC33FJ32MC202/

204 and dsPIC33FJ16MC304 is shown in Figure 2-2.

Preliminary

DS70283B-page 13

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

The

dsPIC33FJ32MC202/204

and

2.3

Special MCU Features

dsPIC33FJ16MC304 supports 16/16 and 32/16 divide

operations, both fractional and integer. All divide

instructions are iterative operations. They must be

executed within a REPEAT loop, resulting in a total

execution time of 19 instruction cycles. The divide

operation can be interrupted during any of those

19 cycles without loss of data.

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 features a 17-bit by 17-bit single-

cycle multiplier that is shared by both the MCU ALU

and DSP engine. The multiplier can perform signed,

unsigned and mixed-sign multiplication. Using a 17-bit

by 17-bit multiplier for 16-bit by 16-bit multiplication not

only allows you to perform mixed-sign multiplication, it

also achieves accurate results for special operations,

such as (-1.0) x (-1.0).

A 40-bit barrel shifter is used to perform up to a 16-bit

left or right shift in a single cycle. The barrel shifter can

be used by both MCU and DSP instructions.

FIGURE 2-1:

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 CPU CORE BLOCK DIAGRAM

PSV & Table

Data Access

Control Block

Y Data Bus

X Data Bus

Interrupt

Controller

16

8

16

Data Latch

X RAM

23

16

PCH PCL

Program Counter

PCU

Y RAM

23

Address

Latch

Address

Latch

Loop

Control

Logic

Stack

Control

Logic

23

16

Address Generator Units

Address Latch

Program Memory

Data Latch

EA MUX

Address Bus

ROM Latch

24

16

Instruction

Decode &

Control

Instruction Reg

16

Control Signals

to Various Blocks

DSP Engine

16 x 16

W Register Array

Divide Support

16

16-bit ALU

16

To Peripheral Modules

DS70283B-page 14

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 2-2:

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 PROGRAMMER’S MODEL

D15

D0

W0/WREG

W1

PUSH.SShadow

DOShadow

W2

W3

Legend

W4

DSP Operand

Registers

W5

W6

W7

Working Registers

W8

W9

DSP Address

Registers

W10

W11

W12/DSP Offset

W13/DSP Write Back

W14/Frame Pointer

W15/Stack Pointer

SPLIM

Stack Pointer Limit Register

AD15

AD39

ACCA

AD31

AD0

DSP

Accumulators

ACCB

PC22

PC0

0

Program Counter

0

7

TBLPAG

Data Table Page Address

7

0

PSVPAG

Program Space Visibility Page Address

15

0

RCOUNT

REPEATLoop Counter

DOLoop Counter

15

DCOUNT

22

0

DOSTART

DOEND

DOLoop Start Address

DOLoop End Address

22

15

0

Core Configuration Register

CORCON

OA OB SA SB OAB SAB DA DC

SRH

RA

N

Z

C

IPL2 IPL1 IPL0

OV

STATUS Register

SRL

Preliminary

DS70283B-page 15

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

2.4

CPU Control Registers

REGISTER 2-1:

SR: CPU STATUS REGISTER

R-0

OA

R-0

OB

R/C-0

SA⁽¹⁾

R/C-0

SB⁽¹⁾

R-0

R/C-0

SAB

R -0

DA

R/W-0

DC

OAB

bit 15

bit 8

R/W-0⁽²⁾

R/W-0⁽³⁾

IPL<2:0>⁽²⁾

R/W-0⁽³⁾

R-0

RA

R/W-0

N

R/W-0

OV

R/W-0

Z

R/W-0

C

bit 7

bit 0

Legend:

C = Clear only bit

S = Set only bit

‘1’ = Bit is set

R = Readable bit

W = Writable bit

‘0’ = Bit is cleared

U = Unimplemented bit, read as ‘0’

-n = Value at POR

x = Bit is unknown

bit 15

bit 14

bit 13

bit 12

bit 11

bit 10

OA: Accumulator A Overflow Status bit

1= Accumulator A overflowed

0= Accumulator A has not overflowed

OB: Accumulator B Overflow Status bit

1= Accumulator B overflowed

0= Accumulator B has not overflowed

SA: Accumulator A Saturation ‘Sticky’ Status bit⁽¹⁾

1= Accumulator A is saturated or has been saturated at some time

0= Accumulator A is not saturated

SB: Accumulator B Saturation ‘Sticky’ Status bit⁽¹⁾

1= Accumulator B is saturated or has been saturated at some time

0= Accumulator B is not saturated

OAB: OA || OB Combined Accumulator Overflow Status bit

1= Accumulators A or B have overflowed

0= Neither Accumulators A or B have overflowed

SAB: SA || SB Combined Accumulator ‘Sticky’ Status bit

1= Accumulators A or B are saturated or have been saturated at some time in the past

0= Neither Accumulator A or B are saturated

Note:

This bit may be read or cleared (not set). Clearing this bit will clear SA and SB.

bit 9

bit 8

DA: DOLoop Active bit

1= DOloop in progress

0= DOloop not in progress

DC: MCU ALU Half Carry/Borrow bit

1= A carry-out from the 4th low-order bit (for byte-sized data) or 8th low-order bit (for word-sized data)

of the result occurred

0= No carry-out from the 4th low-order bit (for byte-sized data) or 8th low-order bit (for word-sized

data) of the result occurred

Note 1: This bit can be read or cleared (not set).

2: The IPL<2:0> bits are concatenated with the IPL<3> bit (CORCON<3>) to form the CPU Interrupt Priority

Level. The value in parentheses indicates the IPL if IPL<3> = 1. User interrupts are disabled when

IPL<3> = 1.

3: The IPL<2:0> Status bits are read only when NSTDIS = 1(INTCON1<15>).

DS70283B-page 16

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 2-1:

SR: CPU STATUS REGISTER (CONTINUED)

bit 7-5

IPL<2:0>: CPU Interrupt Priority Level Status bits⁽²⁾

111= CPU Interrupt Priority Level is 7 (15), user interrupts disabled

110= CPU Interrupt Priority Level is 6 (14)

101= CPU Interrupt Priority Level is 5 (13)

100= CPU Interrupt Priority Level is 4 (12)

011= CPU Interrupt Priority Level is 3 (11)

010= CPU Interrupt Priority Level is 2 (10)

001= CPU Interrupt Priority Level is 1 (9)

000= CPU Interrupt Priority Level is 0 (8)

bit 4

bit 3

bit 2

RA: REPEATLoop Active bit

1= REPEATloop in progress

0= REPEATloop not in progress

N: MCU ALU Negative bit

1= Result was negative

0= Result was non-negative (zero or positive)

OV: MCU ALU Overflow bit

This bit is used for signed arithmetic (2’s complement). It indicates an overflow of a magnitude that

causes the sign bit to change state.

1= Overflow occurred for signed arithmetic (in this arithmetic operation)

0= No overflow occurred

bit 1

bit 0

Z: MCU ALU Zero bit

1= An operation that affects the Z bit has set it at some time in the past

0= The most recent operation that affects the Z bit has cleared it (i.e., a non-zero result)

C: MCU ALU Carry/Borrow bit

1= A carry-out from the Most Significant bit of the result occurred

0= No carry-out from the Most Significant bit of the result occurred

Note 1: This bit can be read or cleared (not set).

2: The IPL<2:0> bits are concatenated with the IPL<3> bit (CORCON<3>) to form the CPU Interrupt Priority

Level. The value in parentheses indicates the IPL if IPL<3> = 1. User interrupts are disabled when

IPL<3> = 1.

3: The IPL<2:0> Status bits are read only when NSTDIS = 1(INTCON1<15>).

Preliminary

DS70283B-page 17

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 2-2:

CORCON: CORE CONTROL REGISTER

U-0

—

U-0

—

U-0

—

R/W-0

US

R/W-0

EDT⁽¹⁾

R-0

DL<2:0>

bit 15

bit 8

R/W-0

SATA

R/W-0

SATB

R/W-1

R/W-0

R/C-0

IPL3⁽²⁾

R/W-0

PSV

R/W-0

RND

R/W-0

IF

SATDW

ACCSAT

bit 7

bit 0

Legend:

C = Clear only bit

W = Writable bit

‘x = Bit is unknown

R = Readable bit

0’ = Bit is cleared

-n = Value at POR

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

bit 15-13

bit 12

Unimplemented: Read as ‘0’

US: DSP Multiply Unsigned/Signed Control bit

1= DSP engine multiplies are unsigned

0= DSP engine multiplies are signed

bit 11

EDT: Early DOLoop Termination Control bit⁽¹⁾

1= Terminate executing DOloop at end of current loop iteration

0= No effect

bit 10-8

DL<2:0>: DOLoop Nesting Level Status bits

111= 7 DOloops active

•

001= 1 DOloop active

000= 0 DOloops active

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

SATA: ACCA Saturation Enable bit

1= Accumulator A saturation enabled

0= Accumulator A saturation disabled

SATB: ACCB Saturation Enable bit

1= Accumulator B saturation enabled

0= Accumulator B saturation disabled

SATDW: Data Space Write from DSP Engine Saturation Enable bit

1= Data space write saturation enabled

0= Data space write saturation disabled

ACCSAT: Accumulator Saturation Mode Select bit

1= 9.31 saturation (super saturation)

0= 1.31 saturation (normal saturation)

IPL3: CPU Interrupt Priority Level Status bit 3⁽²⁾

1= CPU interrupt priority level is greater than 7

0= CPU interrupt priority level is 7 or less

PSV: Program Space Visibility in Data Space Enable bit

1= Program space visible in data space

0= Program space not visible in data space

Note 1: This bit will always read as ‘0’.

2: The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU interrupt priority level.

DS70283B-page 18

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 2-2:

CORCON: CORE CONTROL REGISTER (CONTINUED)

bit 1

RND: Rounding Mode Select bit

1= Biased (conventional) rounding enabled

0= Unbiased (convergent) rounding enabled

bit 0

IF: Integer or Fractional Multiplier Mode Select bit

1= Integer mode enabled for DSP multiply ops

0= Fractional mode enabled for DSP multiply ops

Note 1: This bit will always read as ‘0’.

2: The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU interrupt priority level.

Preliminary

DS70283B-page 19

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

2.5.2

DIVIDER

2.5

Arithmetic Logic Unit (ALU)

The divide block supports 32-bit/16-bit and 16-bit/16-bit

signed and unsigned integer divide operations with the

following data sizes:

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 ALU is 16 bits wide and is capa-

ble of addition, subtraction, bit shifts and logic opera-

tions. Unless otherwise mentioned, arithmetic

operations are 2’s complement in nature. Depending

on the operation, the ALU can affect the values of the

Carry (C), Zero (Z), Negative (N), Overflow (OV) and

Digit Carry (DC) Status bits in the SR register. The C

and DC Status bits operate as Borrow and Digit Borrow

bits, respectively, for subtraction operations.

1. 32-bit signed/16-bit signed divide

2. 32-bit unsigned/16-bit unsigned divide

3. 16-bit signed/16-bit signed divide

4. 16-bit unsigned/16-bit unsigned divide

The quotient for all divide instructions ends up in W0

and the remainder in W1. 16-bit signed and unsigned

DIVinstructions can specify any W register for both the

16-bit divisor (Wn) and any W register (aligned) pair

(W(m + 1):Wm) for the 32-bit dividend. The divide algo-

rithm takes one cycle per bit of divisor, so both 32-bit/

16-bit and 16-bit/16-bit instructions take the same num-

ber of cycles to execute.

The ALU can perform 8-bit or 16-bit operations,

depending on the mode of the instruction that is used.

Data for the ALU operation can come from the W reg-

ister array or data memory, depending on the address-

ing mode of the instruction. Likewise, output data from

the ALU can be written to the W register array or a data

memory location.

2.6

DSP Engine

Refer to the “dsPIC30F/33F Programmer’s Reference

Manual” (DS70157) for information on the SR bits

affected by each instruction.

The DSP engine consists of a high-speed 17-bit x

17-bit multiplier, a barrel shifter and a 40-bit adder/

subtracter (with two target accumulators, round and

saturation logic).

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 CPU incorporates hardware sup-

port for both multiplication and division. This includes a

dedicated hardware multiplier and support hardware

for 16-bit-divisor division.

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 is a single-cycle instruction flow

architecture; therefore, concurrent operation of the

DSP engine with MCU instruction flow is not possible.

However, some MCU ALU and DSP engine resources

can be used concurrently by the same instruction (e.g.,

ED, EDAC).

2.5.1

MULTIPLIER

Using the high-speed 17-bit x 17-bit multiplier of the

DSP engine, the ALU supports unsigned, signed or

mixed-sign operation in several MCU multiplication

modes:

The DSP engine can also perform inherent accumula-

tor-to-accumulator operations that require no additional

data. These instructions are ADD,SUBand NEG.

• 16-bit x 16-bit signed

The DSP engine has options selected through bits in

the CPU Core Control register (CORCON), as listed

below:

• 16-bit x 16-bit unsigned

• 16-bit signed x 5-bit (literal) unsigned

• 16-bit unsigned x 16-bit unsigned

• 16-bit unsigned x 5-bit (literal) unsigned

• 16-bit unsigned x 16-bit signed

• 8-bit unsigned x 8-bit unsigned

• Fractional or integer DSP multiply (IF)

• Signed or unsigned DSP multiply (US)

• Conventional or convergent rounding (RND)

• Automatic saturation on/off for ACCA (SATA)

• Automatic saturation on/off for ACCB (SATB)

• Automatic saturation on/off for writes to data

memory (SATDW)

• Accumulator Saturation mode selection (ACCSAT)

A block diagram of the DSP engine is shown in

Figure 2-3.

DS70283B-page 20

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 2-1:

DSP INSTRUCTIONS SUMMARY

Instruction

Algebraic Operation

ACC Write Back

CLR

A = 0

Yes

No

ED

A = (x – y)2

A = A + (x – y)2

A = A + (x * y)

A = A + x2

EDAC

MAC

No

Yes

No

MAC

MOVSAC

MPY

No change in A

A = x * y

Yes

No

MPY

A = x 2

No

MPY.N

MSC

A = – x * y

No

A = A – x * y

Yes

FIGURE 2-3:

DSP ENGINE BLOCK DIAGRAM

S

a

40

40-bit Accumulator A

40-bit Accumulator B

t

16

40

Round

Logic

u

r

a

t

Carry/Borrow Out

Carry/Borrow In

Saturate

Adder

e

Negate

40

Barrel

Shifter

16

40

Sign-Extend

32

16

Zero Backfill

32

33

17-bit

Multiplier/Scaler

16

To/From W Array

Preliminary

DS70283B-page 21

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

2.6.1

MULTIPLIER

2.6.2.1

Adder/Subtracter, Overflow and

Saturation

The 17-bit x 17-bit multiplier is capable of signed or

unsigned operation and can multiplex its output using a

scaler to support either 1.31 fractional (Q31) or 32-bit

integer results. Unsigned operands are zero-extended

into the 17th bit of the multiplier input value. Signed

operands are sign-extended into the 17th bit of the

multiplier input value. The output of the 17-bit x 17-bit

multiplier/scaler is a 33-bit value that is sign-extended

to 40 bits. Integer data is inherently represented as a

signed 2’s complement value, where the Most Signifi-

cant bit (MSb) is defined as a sign bit. The range of an

N-bit 2’s complement integer is -2^N-1to 2^N-1– 1.

The adder/subtracter is a 40-bit adder with an optional

zero input into one side, and either true or complement

data into the other input.

• In the case of addition, the Carry/Borrow input is

active-high and the other input is true data (not

complemented).

• In the case of subtraction, the Carry/Borrow input

is active-low and the other input is complemented.

The adder/subtracter generates Overflow Status bits,

SA/SB and OA/OB, which are latched and reflected in

the STATUS register:

• For a 16-bit integer, the data range is -32768

(0x8000) to 32767 (0x7FFF) including 0.

• Overflow from bit 39: this is a catastrophic

overflow in which the sign of the accumulator is

destroyed.

• For a 32-bit integer, the data range is -

2,147,483,648 (0x8000 0000) to 2,147,483,647

(0x7FFF FFFF).

• Overflow into guard bits 32 through 39: this is a

recoverable overflow. This bit is set whenever all

the guard bits are not identical to each other.

When the multiplier is configured for fractional multipli-

cation, the data is represented as a 2’s complement

fraction, where the MSb is defined as a sign bit and the

radix point is implied to lie just after the sign bit (QX

format). The range of an N-bit 2’s complement fraction

with this implied radix point is -1.0 to (1 – 2^1-N). For a

16-bit fraction, the Q15 data range is -1.0 (0x8000) to

0.999969482 (0x7FFF) including 0 and has a precision

of 3.01518x10^-5. In Fractional mode, the 16 x 16 multi-

ply operation generates a 1.31 product that has a pre-

The adder has an additional saturation block that

controls accumulator data saturation, if selected. It

uses the result of the adder, the Overflow Status bits

described

previously

and

the

SAT<A:B>

(CORCON<7:6>) and ACCSAT (CORCON<4>) mode

control bits to determine when and to what value to

saturate.

Six STATUS register bits support saturation and

overflow:

cision of 4.65661 x 10^-10

.

The same multiplier is used to support the MCU multi-

ply instructions, which include integer 16-bit signed,

unsigned and mixed sign multiply operations.

• OA: ACCA overflowed into guard bits

• OB: ACCB overflowed into guard bits

• SA: ACCA saturated (bit 31 overflow and

saturation)

or

ACCA overflowed into guard bits and saturated

(bit 39 overflow and saturation)

The MUL instruction can be directed to use byte or

word-sized operands. Byte operands will direct a 16-bit

result, and word operands will direct a 32-bit result to

the specified register(s) in the W array.

• SB: ACCB saturated (bit 31 overflow and

saturation)

or

2.6.2

DATA ACCUMULATORS AND

ADDER/SUBTRACTER

The data accumulator consists of a 40-bit adder/

subtracter with automatic sign extension logic. It can

select one of two accumulators (A or B) as its pre-

accumulation source and post-accumulation destina-

tion. For the ADDand LACinstructions, the data to be

accumulated or loaded can be optionally scaled using

the barrel shifter prior to accumulation.

ACCB overflowed into guard bits and saturated

(bit 39 overflow and saturation)

• OAB: Logical OR of OA and OB

• SAB: Logical OR of SA and SB

The OA and OB bits are modified each time data

passes through the adder/subtracter. When set, they

indicate that the most recent operation has overflowed

into the accumulator guard bits (bits 32 through 39).

The OA and OB bits can also optionally generate an

arithmetic warning trap when set and the correspond-

ing Overflow Trap Flag Enable bits (OVATE, OVBTE) in

the INTCON1 register are set (refer to Section 6.0

“Interrupt Controller”). This allows the user applica-

tion to take immediate action, for example, to correct

system gain.

DS70283B-page 22

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

The SA and SB bits are modified each time data

passes through the adder/subtracter, but can only be

cleared by the user application. When set, they indicate

that the accumulator has overflowed its maximum

range (bit 31 for 32-bit saturation or bit 39 for 40-bit sat-

uration) and will be saturated (if saturation is enabled).

When saturation is not enabled, SA and SB default to

bit 39 overflow and thus indicate that a catastrophic

overflow has occurred. If the COVTE bit in the

INTCON1 register is set, SA and SB bits will generate

an arithmetic warning trap when saturation is disabled.

• W13, Register Direct:

The rounded contents of the non-target

accumulator are written into W13 as a

1.15 fraction.

• [W13] + = 2, Register Indirect with Post-Increment:

The rounded contents of the non-target accumu-

lator are written into the address pointed to by

W13 as a 1.15 fraction. W13 is then incremented

by 2 (for a word write).

2.6.3.1

Round Logic

The Overflow and Saturation Status bits can optionally

be viewed in the STATUS Register (SR) as the logical

OR of OA and OB (in bit OAB) and the logical OR of SA

and SB (in bit SAB). Programmers can check one bit in

the STATUS register to determine if either accumulator

has overflowed, or one bit to determine if either accu-

mulator has saturated. This is useful for complex num-

ber arithmetic, which typically uses both accumulators.

The round logic is a combinational block that performs

a conventional (biased) or convergent (unbiased)

round function during an accumulator write (store). The

Round mode is determined by the state of the RND bit

in the CORCON register. It generates a 16-bit, 1.15

data value that is passed to the data space write satu-

ration logic. If rounding is not indicated by the instruc-

tion, a truncated 1.15 data value is stored and the least

significant word is simply discarded.

The device supports three Saturation and Overflow

modes:

Conventional rounding zero-extends bit 15 of the accu-

mulator and adds it to the ACCxH word (bits 16 through

31 of the accumulator).

• Bit 39 Overflow and Saturation:

When bit 39 overflow and saturation occurs, the

saturation logic loads the maximally positive 9.31

(0x7FFFFFFFFF) or maximally negative 9.31 value

(0x8000000000) into the target accumulator. The

SA or SB bit is set and remains set until cleared by

the user application. This condition is referred to as

‘super saturation’ and provides protection against

erroneous data or unexpected algorithm problems

(such as gain calculations).

• If the ACCxL word (bits 0 through 15 of the accu-

mulator) is between 0x8000 and 0xFFFF (0x8000

included), ACCxH is incremented.

• If ACCxL is between 0x0000 and 0x7FFF, ACCxH

is left unchanged.

A consequence of this algorithm is that over a succes-

sion of random rounding operations, the value tends to

be biased slightly positive.

• Bit 31 Overflow and Saturation:

Convergent (or unbiased) rounding operates in the

same manner as conventional rounding, except when

ACCxL equals 0x8000. In this case, the Least Signifi-

cant bit (bit 16 of the accumulator) of ACCxH is

examined:

When bit 31 overflow and saturation occurs, the

saturation logic then loads the maximally positive

1.31 value (0x007FFFFFFF) or maximally nega-

tive 1.31 value (0x0080000000) into the target

accumulator. The SA or SB bit is set and remains

set until cleared by the user application. When

this Saturation mode is in effect, the guard bits are

not used, so the OA, OB or OAB bits are never

set.

• If it is ‘1’, ACCxH is incremented.

• If it is ‘0’, ACCxH is not modified.

Assuming that bit 16 is effectively random in nature,

this scheme removes any rounding bias that may

accumulate.

• Bit 39 Catastrophic Overflow:

The bit 39 Overflow Status bit from the adder is

used to set the SA or SB bit, which remains set

until cleared by the user application. No saturation

operation is performed, and the accumulator is

allowed to overflow, destroying its sign. If the

COVTE bit in the INTCON1 register is set, a

catastrophic overflow can initiate a trap exception.

The SAC and SAC.R instructions store either a

truncated (SAC), or rounded (SAC.R) version of the

contents of the target accumulator to data memory via

the

X

bus, subject to data saturation (see

Section 2.6.3.2 “Data Space Write Saturation”). For

the MAC class of instructions, the accumulator write-

back operation functions in the same manner, address-

ing combined MCU (X and Y) data space though the X

bus. For this class of instructions, the data is always

subject to rounding.

2.6.3

ACCUMULATOR ‘WRITE BACK’

The MAC class of instructions (with the exception of

MPY, MPY.N, ED and EDAC) can optionally write a

rounded version of the high word (bits 31 through 16)

of the accumulator that is not targeted by the instruction

into data space memory. The write is performed across

the X bus into combined X and Y address space. The

following addressing modes are supported:

Preliminary

DS70283B-page 23

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

2.6.3.2

Data Space Write Saturation

2.6.4

BARREL SHIFTER

In addition to adder/subtracter saturation, writes to data

space can also be saturated, but without affecting the

contents of the source accumulator. The data space

write saturation logic block accepts a 16-bit, 1.15 frac-

tional value from the round logic block as its input,

together with overflow status from the original source

(accumulator) and the 16-bit round adder. These inputs

are combined and used to select the appropriate 1.15

fractional value as output to write to data space

memory.

The barrel shifter can perform up to 16-bit arithmetic or

logic right shifts, or up to 16-bit left shifts in a single

cycle. The source can be either of the two DSP accu-

mulators or the X bus (to support multi-bit shifts of

register or memory data).

The shifter requires a signed binary value to determine

both the magnitude (number of bits) and direction of the

shift operation. A positive value shifts the operand right.

A negative value shifts the operand left. A value of ‘0’

does not modify the operand.

If the SATDW bit in the CORCON register is set, data

(after rounding or truncation) is tested for overflow and

adjusted accordingly:

The barrel shifter is 40 bits wide, thereby obtaining a

40-bit result for DSP shift operations and a 16-bit result

for MCU shift operations. Data from the X bus is pre-

sented to the barrel shifter between bit positions 16 and

31 for right shifts, and between bit positions 0 and 16

for left shifts.

• For input data greater than 0x007FFF, data writ-

ten to memory is forced to the maximum positive

1.15 value, 0x7FFF.

• For input data less than 0xFF8000, data written to

memory is forced to the maximum negative 1.15

value, 0x8000.

The Most Significant bit of the source (bit 39) is used to

determine the sign of the operand being tested.

If the SATDW bit in the CORCON register is not set, the

input data is always passed through unmodified under

all conditions.

DS70283B-page 24

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

3.1

Program Address Space

3.0

MEMORY ORGANIZATION

The program address memory space of the

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices is 4M instructions. The space is addressable

by a 24-bit value derived either from the 23-bit Program

Counter (PC) during program execution, or from table

operation or data space remapping as described in

Section 3.6 “Interfacing Program and Data Memory

Spaces”.

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

User application access to the program memory space

is restricted to the lower half of the address range

(0x000000 to 0x7FFFFF). The exception is the use of

TBLRD/TBLWT operations, which use TBLPAG<7> to

permit access to the Configuration bits and Device ID

sections of the configuration memory space.

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 architecture features separate

program and data memory spaces and buses. This

architecture also allows the direct access of program

memory from the data space during code execution.

The memory maps for the dsPIC33FJ32MC202/204

and dsPIC33FJ16MC304 devices are shown in

Figure 3-1.

FIGURE 3-1:

PROGRAM MEMORY MAPS FOR dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

DEVICES

dsPIC33FJ32MC202/204

dsPIC33FJ16MC304

0x000000

0x000002

0x000004

0x000000

0x000002

0x000004

GOTOInstruction

Reset Address

GOTOInstruction

Reset Address

Interrupt Vector Table

Reserved

Interrupt Vector Table

Reserved

0x0000FE

0x000100

0x000104

0x0001FE

0x000200

0x0000FE

0x000100

0x000104

0x0001FE

0x000200

Alternate Vector Table

User Program

Flash Memory

(11264 instructions)

User Program

Flash Memory

(5632 instructions)

0x0057FE

0x005800

0x002BFE

0x002C00

Unimplemented

(Read ‘

0’s)

(Read ‘0’s)

0x7FFFFE

0x800000

0x7FFFFE

0x800000

Reserved

0xF7FFFE

0xF80000

0xF80017

0xF80018

0xF7FFFE

0xF80000

0xF80017

0xF80018

Device Configuration

Registers

Device Configuration

Registers

Reserved

DEVID (2)

Reserved

DEVID (2)

0xFEFFFE

0xFF0000

0xFEFFFE

0xFF0000

0xFFFFFE

Preliminary

DS70283B-page 25

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

3.1.1

PROGRAM MEMORY

ORGANIZATION

3.1.2

INTERRUPT AND TRAP VECTORS

All dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices reserve the addresses between 0x00000 and

0x000200 for hard-coded program execution vectors.

A hardware Reset vector is provided to redirect code

execution from the default value of the PC on device

Reset to the actual start of code. A GOTOinstruction is

programmed by the user application at 0x000000, with

the actual address for the start of code at 0x000002.

The program memory space is organized in word-

addressable blocks. Although it is treated as 24 bits

wide, it is more appropriate to think of each address of

the program memory as a lower and upper word, with

the upper byte of the upper word being unimplemented.

The lower word always has an even address, while the

upper word has an odd address (Figure 3-2).

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices also have two interrupt vector tables, located

from 0x000004 to 0x0000FF and 0x000100 to

0x0001FF. These vector tables allow each of the

device interrupt sources to be handled by separate

Interrupt Service Routines (ISRs). A more detailed dis-

cussion of the interrupt vector tables is provided in

Section 6.1 “Interrupt Vector Table”.

Program memory addresses are always word-aligned

on the lower word, and addresses are incremented or

decremented by two during code execution. This

arrangement provides compatibility with data memory

space addressing and makes data in the program

memory space accessible.

FIGURE 3-2:

PROGRAM MEMORY ORGANIZATION

least significant word

PC Address

most significant word

23

msw

Address

(lsw Address)

16

8

0

0x000001

0x000003

0x000005

0x000007

0x000000

0x000002

0x000004

0x000006

00000000

Program Memory

‘Phantom’ Byte

(read as ‘0’)

Instruction Width

DS70283B-page 26

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

All word accesses must be aligned to an even address.

Misaligned word data fetches are not supported, so

3.2

Data Address Space

The

dsPIC33FJ32MC202/204

and

care must be taken when mixing byte and word

operations, or translating from 8-bit MCU code. If a

misaligned read or write is attempted, an address error

trap is generated. If the error occurred on a read, the

instruction underway is completed. If the error occurred

on a write, the instruction is executed but the write does

not occur. In either case, a trap is then executed,

allowing the system and/or user application to examine

the machine state prior to execution of the address

Fault.

dsPIC33FJ16MC304 CPU has a separate 16-bit-wide

data memory space. The data space is accessed using

separate Address Generation Units (AGUs) for read

and write operations. The data memory maps is shown

in Figure 3-3.

All Effective Addresses (EAs) in the data memory space

are 16 bits wide and point to bytes within the data space.

This arrangement gives a data space address range of

64 Kbytes or 32K words. The lower half of the data

memory space (that is, when EA<15> = 0) is used for

implemented memory addresses, while the upper half

(EA<15> = 1) is reserved for the Program Space

Visibility area (see Section 3.6.3 “Reading Data From

Program Memory Using Program Space Visibility”).

All byte loads into any W register are loaded into the

Least Significant Byte. The Most Significant Byte is not

modified.

A sign-extend instruction (SE) is provided to allow user

applications to translate 8-bit signed data to 16-bit

signed values. Alternatively, for 16-bit unsigned data,

user applications can clear the MSB of any W register

by executing a zero-extend (ZE) instruction on the

appropriate address.

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices implement up to 30 Kbytes of data memory.

Should an EA point to a location outside of this area, an

all-zero word or byte will be returned.

3.2.1

DATA SPACE WIDTH

3.2.3

SFR SPACE

The data memory space is organized in byte

addressable, 16-bit wide blocks. Data is aligned in data

memory and registers as 16-bit words, but all data

space EAs resolve to bytes. The Least Significant

Bytes (LSBs) of each word have even addresses, while

the Most Significant Bytes (MSBs) have odd

addresses.

The first 2 Kbytes of the Near Data Space, from 0x0000

to 0x07FF, is primarily occupied by Special Function

Registers (SFRs). These are used by the

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

core and peripheral modules for controlling the

operation of the device.

SFRs are distributed among the modules that they

control, and are generally grouped together by module.

Much of the SFR space contains unused addresses;

these are read as ‘0’.

3.2.2

DATA MEMORY ORGANIZATION

AND ALIGNMENT

To maintain backward compatibility with PIC^®devices

and improve data space memory usage efficiency, the

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

instruction set supports both word and byte operations.

As a consequence of byte accessibility, all effective

address calculations are internally scaled to step

through word-aligned memory. For example, the core

recognizes that Post-Modified Register Indirect

Addressing mode [Ws++] will result in a value of Ws +

1 for byte operations and Ws + 2 for word operations.

Note:

The actual set of peripheral features and

interrupts varies by the device. Refer to

the corresponding device tables and

pinout diagrams for device-specific

information.

3.2.4

NEAR DATA SPACE

The 8 Kbyte area between 0x0000 and 0x1FFF is

referred to as the near data space. Locations in this

space are directly addressable via a 13-bit absolute

address field within all memory direct instructions.

Additionally, the whole data space is addressable using

MOV instructions, which support Memory Direct

Addressing mode with a 16-bit address field, or by

using Indirect Addressing mode using a working

register as an address pointer.

Data byte reads will read the complete word that

contains the byte, using the LSB of any EA to deter-

mine which byte to select. The selected byte is placed

onto the LSB of the data path. That is, data memory

and registers are organized as two parallel byte-wide

entities with shared (word) address decode but sepa-

rate write lines. Data byte writes only write to the corre-

sponding side of the array or register that matches the

byte address.

Preliminary

DS70283B-page 27

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 3-3:

DATA MEMORY MAP FOR dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

DEVICES WITH 2 KB RAM

MSB

Address

LSB

Address

16 bits

MSb

LSb

0x0000

0x0001

2 Kbyte

SFR Space

0x07FE

0x0800

0x07FF

0x0801

X Data RAM (X)

Y Data RAM (Y)

8 Kbyte

Near Data

Space

0x0BFF

0x0001

0x0BFE

0x0C00

2 Kbyte

SRAM Space

0x0FFF

0x1001

0x0FFE

0x1000

0x1FFE

0x2000

0x1FFF

0x2001

0x8001

0x8000

X Data

Optionally

Mapped

Unimplemented (X)

into Program

Memory

0xFFFF

0xFFFE

DS70283B-page 28

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

3.2.5

X AND Y DATA SPACES

The core has two data spaces, X and Y. These data

spaces can be considered either separate (for some

DSP instructions), or as one unified linear address

range (for MCU instructions). The data spaces are

accessed using two Address Generation Units (AGUs)

and separate data paths. This feature allows certain

instructions to concurrently fetch two words from RAM,

thereby enabling efficient execution of DSP algorithms

such as Finite Impulse Response (FIR) filtering and

Fast Fourier Transform (FFT).

The X data space is used by all instructions and

supports all addressing modes. X data space has

separate read and write data buses. The X read data

bus is the read data path for all instructions that view

data space as combined X and Y address space. It is

also the X data prefetch path for the dual operand DSP

instructions (MACclass).

The Y data space is used in concert with the X data

space by the MAC class of instructions (CLR, ED,

EDAC, MAC, MOVSAC, MPY, MPY.N and MSC) to

provide two concurrent data read paths.

Both the X and Y data spaces support Modulo

Addressing mode for all instructions, subject to

addressing mode restrictions. Bit-Reversed Addressing

mode is only supported for writes to X data space.

All data memory writes, including in DSP instructions,

view data space as combined X and Y address space.

The boundary between the X and Y data spaces is

device-dependent and is not user-programmable.

All effective addresses are 16 bits wide and point to

bytes within the data space. Therefore, the data space

address range is 64 Kbytes, or 32K words, though the

implemented memory locations vary by device.

Preliminary

DS70283B-page 29

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

3.2.6

SOFTWARE STACK

3.2.7

DATA RAM PROTECTION FEATURE

The dsPIC33F product family supports Data RAM

protection features that enable segments of RAM to be

protected when used in conjunction with Boot and

Secure Code Segment Security. BSRAM (Secure RAM

segment for BS) is accessible only from the Boot

Segment Flash code when enabled. SSRAM (Secure

RAM segment for RAM) is accessible only from the

Secure Segment Flash code when enabled. See

Table 3-1 for an overview of the BSRAM and SSRAM

SFRs.

In addition to its use as a working register, the W15

register in the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices is also used as a soft-

ware Stack Pointer. The Stack Pointer always points to

the first available free word and grows from lower to

higher addresses. It predecrements for stack pops and

post-increments for stack pushes, as shown in

Figure 3-4. For a PC push during any CALLinstruction,

the MSb of the PC is zero-extended before the push,

ensuring that the MSb is always clear.

Note:

A PC push during exception processing

concatenates the SRL register to the MSb

of the PC prior to the push.

3.3

Instruction Addressing Modes

The addressing modes shown in Table 3-26 form the

basis of the addressing modes optimized to support the

specific features of individual instructions. The

addressing modes provided in the MACclass of

instructions differ from those in the other instruction

types.

The Stack Pointer Limit register (SPLIM) associated

with the Stack Pointer sets an upper address boundary

for the stack. SPLIM is uninitialized at Reset. As is the

case for the Stack Pointer, SPLIM<0> is forced to ‘0’

because all stack operations must be word-aligned.

Whenever an EA is generated using W15 as a source

or destination pointer, the resulting address is

compared with the value in SPLIM. If the contents of

the Stack Pointer (W15) and the SPLIM register are

equal and a push operation is performed, a stack error

trap will not occur. The stack error trap will occur on a

subsequent push operation. For example, to cause a

stack error trap when the stack grows beyond address

0x2000 in RAM, initialize the SPLIM with the value

0x1FFE.

3.3.1

FILE REGISTER INSTRUCTIONS

Most file register instructions use a 13-bit address field

(f) to directly address data present in the first 8192

bytes of data memory (near data space). Most file

register instructions employ a working register, W0,

which is denoted as WREG in these instructions. The

destination is typically either the same file register or

WREG (with the exception of the MUL instruction),

which writes the result to a register or register pair. The

MOV instruction allows additional flexibility and can

access the entire data space.

Similarly, a Stack Pointer underflow (stack error) trap is

generated when the Stack Pointer address is found to

be less than 0x0800. This prevents the stack from

interfering with the Special Function Register (SFR)

space.

3.3.2

MCU INSTRUCTIONS

The three-operand MCU instructions are of the form:

Operand 3 = Operand 1 <function> Operand 2

A write to the SPLIM register should not be immediately

followed by an indirect read operation using W15.

where Operand 1 is always a working register (that is,

the addressing mode can only be register direct), which

is referred to as Wb. Operand 2 can be a W register,

fetched from data memory, or a 5-bit literal. The result

location can be either a W register or a data memory

location. The following addressing modes are

supported by MCU instructions:

FIGURE 3-4:

CALLSTACK FRAME

0x0000

15

0

• Register Direct

• Register Indirect

• Register Indirect Post-Modified

• Register Indirect Pre-Modified

• 5-bit or 10-bit Literal

PC<15:0>

000000000

W15 (before CALL)

PC<22:16>

W15 (after CALL)

Note:

Not all instructions support all the

addressing modes given above. Individual

instructions can support different subsets

of these addressing modes.

POP : [--W15]

PUSH: [W15++]

DS70283B-page 42

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 3-26: FUNDAMENTAL ADDRESSING MODES SUPPORTED

Addressing Mode

File Register Direct

Description

The address of the file register is specified explicitly.

The contents of a register are accessed directly.

The contents of Wn forms the Effective Address (EA).

Register Direct

Register Indirect

Register Indirect Post-Modified

The contents of Wn forms the EA. Wn is post-modified (incremented

or decremented) by a constant value.

Register Indirect Pre-Modified

Wn is pre-modified (incremented or decremented) by a signed constant value

to form the EA.

Register Indirect with Register Offset The sum of Wn and Wb forms the EA.

(Register Indexed)

Register Indirect with Literal Offset

The sum of Wn and a literal forms the EA.

3.3.4

MACINSTRUCTIONS

The dual source operand DSP instructions (CLR, ED,

EDAC, MAC, MPY, MPY.N, MOVSACand MSC), also referred

to as MACinstructions, use a simplified set of addressing

modes to allow the user application to effectively

manipulate the data pointers through register indirect

tables.

3.3.3

MOVE AND ACCUMULATOR

INSTRUCTIONS

Move instructions and the DSP accumulator class of

instructions provide a greater degree of addressing

flexibility than other instructions. In addition to the

addressing modes supported by most MCU

instructions, move and accumulator instructions also

support Register Indirect with Register Offset

Addressing mode, also referred to as Register Indexed

mode.

The two-source operand prefetch registers must be

members of the set {W8, W9, W10, W11}. For data

reads, W8 and W9 are always directed to the X RAGU,

and W10 and W11 are always directed to the Y AGU.

The effective addresses generated (before and after

modification) must, therefore, be valid addresses within

X data space for W8 and W9 and Y data space for W10

and W11.

Note:

For the MOV instructions, the addressing

mode specified in the instruction can differ

for the source and destination EA.

However, the 4-bit Wb (Register Offset)

field is shared by both source and

destination (but typically only used by

one).

Note:

Register Indirect with Register Offset

Addressing mode is available only for W9

(in X space) and W11 (in Y space).

In summary, the following addressing modes are

supported by the MACclass of instructions:

In summary, the following addressing modes are

supported by move and accumulator instructions:

• Register Indirect

• Register Direct

• Register Indirect Post-Modified by 2

• Register Indirect Post-Modified by 4

• Register Indirect Post-Modified by 6

• Register Indirect with Register Offset (Indexed)

• Register Indirect

• Register Indirect Post-modified

• Register Indirect Pre-modified

• Register Indirect with Register Offset (Indexed)

• Register Indirect with Literal Offset

• 8-bit Literal

3.3.5

OTHER INSTRUCTIONS

Besides the addressing modes outlined previously, some

instructions use literal constants of various sizes. For

example, BRA(branch) instructions use 16-bit signed lit-

erals to specify the branch destination directly, whereas

the DISIinstruction uses a 14-bit unsigned literal field. In

some instructions, such as ADD Acc, the source of an

operand or result is implied by the opcode itself. Certain

operations, such as NOP, do not have any operands.

• 16-bit Literal

Note:

Not all instructions support all the address-

ing modes given above. Individual instruc-

tions may support different subsets of

these addressing modes.

Preliminary

DS70283B-page 43

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

3.4

Modulo Addressing

Note:

Y space Modulo Addressing EA calcula-

tions assume word-sized data (LSb of

every EA is always clear).

Modulo Addressing mode is a method of providing an

automated means to support circular data buffers using

hardware. The objective is to remove the need for

software to perform data address boundary checks

when executing tightly looped code, as is typical in

many DSP algorithms.

The length of a circular buffer is not directly specified. It

is determined by the difference between the

corresponding start and end addresses. The maximum

possible length of the circular buffer is 32K words

(64 Kbytes).

Modulo Addressing can operate in either data or program

space (since the data pointer mechanism is essentially

the same for both). One circular buffer can be supported

in each of the X (which also provides the pointers into

program space) and Y data spaces. Modulo Addressing

can operate on any W register pointer. However, it is not

advisable to use W14 or W15 for Modulo Addressing

since these two registers are used as the Stack Frame

Pointer and Stack Pointer, respectively.

3.4.2

W ADDRESS REGISTER

SELECTION

The Modulo and Bit-Reversed Addressing Control

register, MODCON<15:0>, contains enable flags as well

as a W register field to specify the W Address registers.

The XWM and YWM fields select the registers that will

operate with Modulo Addressing:

In general, any particular circular buffer can be config-

ured to operate in only one direction as there are

certain restrictions on the buffer start address (for incre-

menting buffers), or end address (for decrementing

buffers), based upon the direction of the buffer.

• If XWM = 15, X RAGU and X WAGU Modulo

Addressing is disabled.

• If YWM = 15, Y AGU Modulo Addressing is

disabled.

The X Address Space Pointer W register (XWM), to

which Modulo Addressing is to be applied, is stored in

MODCON<3:0> (see Table 3-1). Modulo Addressing is

enabled for X data space when XWM is set to any value

other than ‘15’ and the XMODEN bit is set at

MODCON<15>.

The only exception to the usage restrictions is for

buffers that have a power-of-two length. As these

buffers satisfy the start and end address criteria, they

can operate in a bidirectional mode (that is, address

boundary checks are performed on both the lower and

upper address boundaries).

The Y Address Space Pointer W register (YWM) to

which Modulo Addressing is to be applied is stored in

MODCON<7:4>. Modulo Addressing is enabled for Y

data space when YWM is set to any value other than

‘15’ and the YMODEN bit is set at MODCON<14>.

3.4.1

START AND END ADDRESS

The Modulo Addressing scheme requires that a

starting and ending address be specified and loaded

into the 16-bit Modulo Buffer Address registers:

XMODSRT, XMODEND, YMODSRT and YMODEND

(see Table 3-1).

FIGURE 3-5:

MODULO ADDRESSING OPERATION EXAMPLE

MOV

#0x1100, W0

Byte

Address

W0, XMODSRT

#0x1163, W0

W0, MODEND

#0x8001, W0

W0, MODCON

;set modulo start address

;set modulo end address

;enable W1, X AGU for modulo

;W0 holds buffer fill value

;point W1 to buffer

0x1100

MOV

#0x0000, W0

#0x1110, W1

DO

MOV

AGAIN, #0x31

W0, [W1++]

;fill the 50 buffer locations

;fill the next location

0x1163

AGAIN: INC W0, W0

;increment the fill value

Start Addr = 0x1100

End Addr = 0x1163

Length = 0x0032 words

DS70283B-page 44

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

If the length of a bit-reversed buffer is M = 2^Nbytes,

MODULO ADDRESSING

3.4.3

the last ‘N’ bits of the data buffer start address must

be zeros.

APPLICABILITY

Modulo Addressing can be applied to the Effective

Address (EA) calculation associated with any W

register. Address boundaries check for addresses

equal to:

XB<14:0> is the Bit-Reversed Address modifier, or

‘pivot point,’ which is typically a constant. In the case of

an FFT computation, its value is equal to half of the FFT

data buffer size.

• The upper boundary addresses for incrementing

buffers

Note:

All bit-reversed EA calculations assume

word-sized data (LSb of every EA is

always clear). The XB value is scaled

accordingly to generate compatible (byte)

addresses.

• The lower boundary addresses for decrementing

buffers

It is important to realize that the address boundaries

check for addresses less than or greater than the upper

(for incrementing buffers) and lower (for decrementing

buffers) boundary addresses (not just equal to).

Address changes can, therefore, jump beyond

boundaries and still be adjusted correctly.

When enabled, Bit-Reversed Addressing is executed

only for Register Indirect with Pre-Increment or Post-

Increment Addressing and word-sized data writes. It

will not function for any other addressing mode or for

byte-sized data, and normal addresses are generated

instead. When Bit-Reversed Addressing is active, the

W Address Pointer is always added to the address

modifier (XB), and the offset associated with the Regis-

ter Indirect Addressing mode is ignored. In addition, as

word-sized data is a requirement, the LSb of the EA is

ignored (and always clear).

Note:

The modulo corrected effective address is

written back to the register only when Pre-

Modify or Post-Modify Addressing mode is

used to compute the effective address.

When an address offset (such as [W7 +

W2]) is used, Modulo Address correction

is performed but the contents of the

Note:

Modulo Addressing and Bit-Reversed

Addressing should not be enabled

together. If an application attempts to do so,

Bit-Reversed Addressing will assume prior-

ity when active for the X WAGU and X

WAGU, Modulo Addressing will be dis-

abled. However, Modulo Addressing will

continue to function in the X RAGU.

register remain unchanged.

3.5

Bit-Reversed Addressing

Bit-Reversed Addressing mode is intended to simplify

data re-ordering for radix-2 FFT algorithms. It is

supported by the X AGU for data writes only.

The modifier, which can be a constant value or register

contents, is regarded as having its bit order reversed. The

address source and destination are kept in normal order.

Thus, the only operand requiring reversal is the modifier.

If Bit-Reversed Addressing has already been enabled

by setting the BREN (XBREV<15>) bit, a write to the

XBREV register should not be immediately followed by

an indirect read operation using the W register that has

been designated as the bit-reversed pointer.

3.5.1

BIT-REVERSED ADDRESSING

IMPLEMENTATION

Bit-Reversed Addressing mode is enabled in any of

these situations:

• BWM bits (W register selection) in the MODCON

register are any value other than ‘15’ (the stack

cannot be accessed using Bit-Reversed

Addressing)

• The BREN bit is set in the XBREV register

• The addressing mode used is Register Indirect

with Pre-Increment or Post-Increment

Preliminary

DS70283B-page 45

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 3-6:

BIT-REVERSED ADDRESS EXAMPLE

Sequential Address

b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1

b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b1 b2 b3 b4

0

Bit Locations Swapped Left-to-Right

Around Center of Binary Value

0

Bit-Reversed Address

Pivot Point

XB = 0x0008 for a 16-Word Bit-Reversed Buffer

TABLE 3-27: BIT-REVERSED ADDRESS SEQUENCE (16-ENTRY)

Normal Address Bit-Reversed Address

A3

A2

A1

A0

Decimal

A3

A2

A1

A0

Decimal

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

8

2

4

3

12

2

4

5

10

6

7

14

1

8

9

10

11

12

13

14

15

5

13

3

11

7

15

DS70283B-page 46

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

3.6.1

ADDRESSING PROGRAM SPACE

3.6

Interfacing Program and Data

Memory Spaces

Since the address ranges for the data and program

spaces are 16 and 24 bits, respectively, a method is

needed to create a 23-bit or 24-bit program address

from 16-bit data registers. The solution depends on the

interface method to be used.

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 architecture uses a 24-bit-wide

program space and a 16-bit-wide data space. The

architecture is also a modified Harvard scheme, mean-

ing that data can also be present in the program space.

To use this data successfully, it must be accessed in a

way that preserves the alignment of information in both

spaces.

For table operations, the 8-bit Table Page register

(TBLPAG) is used to define a 32K word region within

the program space. This is concatenated with a 16-bit

EA to arrive at a full 24-bit program space address. In

this format, the Most Significant bit of TBLPAG is used

to determine if the operation occurs in the user memory

(TBLPAG<7> = 0) or the configuration memory

(TBLPAG<7> = 1).

Aside from normal execution, the dsPIC33FJ32MC202/

204 and dsPIC33FJ16MC304 architecture provides

two methods by which program space can be accessed

during operation:

For remapping operations, the 8-bit Program Space

Visibility register (PSVPAG) is used to define a

16K word page in the program space. When the Most

Significant bit of the EA is ‘1’, PSVPAG is concatenated

with the lower 15 bits of the EA to form a 23-bit program

space address. Unlike table operations, this limits

remapping operations strictly to the user memory area.

• Using table instructions to access individual bytes

or words anywhere in the program space

• Remapping a portion of the program space into

the data space (Program Space Visibility)

Table instructions allow an application to read or write

to small areas of the program memory. This capability

makes the method ideal for accessing data tables that

need to be updated periodically. It also allows access

to all bytes of the program word. The remapping

method allows an application to access a large block of

data on a read-only basis, which is ideal for look-ups

from a large table of static data. The application can

only access the least significant word of the program

word.

Table 3-28 and Figure 3-7 show how the program EA is

created for table operations and remapping accesses

from the data EA. Here, P<23:0> refers to a program

space word, and D<15:0> refers to a data space word.

TABLE 3-28: PROGRAM SPACE ADDRESS CONSTRUCTION

Program Space Address

Access

Space

Access Type

<23>

<22:16>

<15>

<14:1>

<0>

Instruction Access

(Code Execution)

User

0

PC<22:1>

0

0xx xxxx xxxx xxxx xxxx xxx0

TBLRD/TBLWT

(Byte/Word Read/Write)

TBLPAG<7:0>

0xxx xxxx

Data EA<15:0>

xxxx xxxx xxxx xxxx

Data EA<15:0>

Configuration

TBLPAG<7:0>

1xxx xxxx

xxxx xxxx xxxx xxxx

Program Space Visibility User

(Block Remap/Read)

0

PSVPAG<7:0>

xxxx xxxx

Data EA<14:0>⁽¹⁾

xxx xxxx xxxx xxxx

Note 1: Data EA<15> is always ‘1’ in this case, but is not used in calculating the program space address. Bit 15 of

the address is PSVPAG<0>.

Preliminary

DS70283B-page 47

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 3-7:

DATA ACCESS FROM PROGRAM SPACE ADDRESS GENERATION

Program Counter⁽¹⁾

Program Counter

23 bits

0

1/0

EA

Table Operations⁽²⁾

1/0

TBLPAG

8 bits

16 bits

24 bits

Select

1

0

EA

Program Space Visibility⁽¹⁾

(Remapping)

0

PSVPAG

8 bits

15 bits

23 bits

Byte Select

User/Configuration

Space Select

Note 1: The Least Significant bit (LSb) of program space addresses is always fixed as ‘0’ to

maintain word alignment of data in the program and data spaces.

2: Table operations are not required to be word-aligned. Table read operations are permitted

in the configuration memory space.

DS70283B-page 48

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

- In Byte mode, either the upper or lower byte

of the lower program word is mapped to the

lower byte of a data address. The upper byte

is selected when Byte Select is ‘1’; the lower

byte is selected when it is ‘0’.

3.6.2

DATA ACCESS FROM PROGRAM

MEMORY USING TABLE

INSTRUCTIONS

The TBLRDL and TBLWTL instructions offer a direct

method of reading or writing the lower word of any

address within the program space without going

through data space. The TBLRDH and TBLWTH

instructions are the only method to read or write the

upper 8 bits of a program space word as data.

• TBLRDH (Table Read High):

- In Word mode, this instruction maps the entire

upper word of a program address (P<23:16>)

to a data address. Note that D<15:8>, the

‘phantom byte’, will always be ‘0’.

The PC is incremented by two for each successive

24-bit program word. This allows program memory

addresses to directly map to data space addresses.

Program memory can thus be regarded as two 16-bit-

wide word address spaces, residing side by side, each

with the same address range. TBLRDL and TBLWTL

access the space that contains the least significant

data word. TBLRDHand TBLWTHaccess the space that

contains the upper data byte.

- In Byte mode, this instruction maps the upper

or lower byte of the program word to D<7:0>

of the data address, in the TBLRDLinstruc-

tion. The data is always ‘0’ when the upper

‘phantom’ byte is selected (Byte Select = 1).

In a similar fashion, two table instructions, TBLWTH

and TBLWTL, are used to write individual bytes or

words to a program space address. The details of

their operation are explained in Section 4.0 “Flash

Program Memory”.

Two table instructions are provided to move byte or

word-sized (16-bit) data to and from program space.

Both function as either byte or word operations.

For all table operations, the area of program memory

space to be accessed is determined by the Table Page

register (TBLPAG). TBLPAG covers the entire program

memory space of the device, including user and

configuration spaces. When TBLPAG<7> = 0, the table

page is located in the user memory space. When

TBLPAG<7> = 1, the page is located in configuration

space.

• TBLRDL(Table Read Low):

- In Word mode, this instruction maps the

lower word of the program space

location (P<15:0>) to a data address

(D<15:0>).

FIGURE 3-8:

ACCESSING PROGRAM MEMORY WITH TABLE INSTRUCTIONS

Program Space

TBLPAG

02

23

15

0

0x000000

23

16

8

0

00000000

0x020000

0x030000

00000000

‘Phantom’ Byte

TBLRDH.B (Wn<0> = 0)

TBLRDL.B (Wn<0> = 1)

TBLRDL.B (Wn<0> = 0)

TBLRDL.W

The address for the table operation is determined by the data EA

within the page defined by the TBLPAG register.

Only read operations are shown; write operations are also valid in

the user memory area.

0x800000

Preliminary

DS70283B-page 49

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

24-bit program word are used to contain the data. The

upper 8 bits of any program space location used as

data should be programmed with ‘1111 1111’ or

‘0000 0000’ to force a NOP. This prevents possible

issues should the area of code ever be accidentally

executed.

3.6.3

READING DATA FROM PROGRAM

MEMORY USING PROGRAM SPACE

VISIBILITY

The upper 32 Kbytes of data space may optionally be

mapped into any 16K word page of the program space.

This option provides transparent access to stored

constant data from the data space without the need to

use special instructions (such as TBLRDL/H).

Note:

PSV access is temporarily disabled during

table reads/writes.

Program space access through the data space occurs

if the Most Significant bit of the data space EA is ‘1’ and

program space visibility is enabled by setting the PSV

bit in the Core Control register (CORCON<2>). The

location of the program memory space to be mapped

into the data space is determined by the Program

Space Visibility Page register (PSVPAG). This 8-bit

register defines any one of 256 possible pages of

16K words in program space. In effect, PSVPAG

functions as the upper 8 bits of the program memory

address, with the 15 bits of the EA functioning as the

lower bits. By incrementing the PC by 2 for each

program memory word, the lower 15 bits of data space

addresses directly map to the lower 15 bits in the

corresponding program space addresses.

For operations that use PSV and are executed outside

a REPEAT loop, the MOV and MOV.D instructions

require one instruction cycle in addition to the specified

execution time. All other instructions require two

instruction cycles in addition to the specified execution

time.

For operations that use PSV, and are executed inside

a REPEATloop, these instances require two instruction

cycles in addition to the specified execution time of the

instruction:

• Execution in the first iteration

• Execution in the last iteration

• Execution prior to exiting the loop due to an

interrupt

• Execution upon re-entering the loop after an

interrupt is serviced

Data reads to this area add a cycle to the instruction

being executed, since two program memory fetches

are required.

Any other iteration of the REPEAT loop will allow the

instruction using PSV to access data, to execute in a

single cycle.

Although each data space address 8000h and higher

maps directly into a corresponding program memory

address (see Figure 3-9), only the lower 16 bits of the

FIGURE 3-9:

PROGRAM SPACE VISIBILITY OPERATION

When CORCON<2> = 1and EA<15> = 1:

Program Space

Data Space

PSVPAG

02

23

15

0

0x000000

0x0000

Data EA<14:0>

0x010000

0x018000

The data in the page

designated by

PSVPAG is mapped

into the upper half of

the data memory

space...

0x8000

PSV Area

...while the lower 15 bits

of the EA specify an

exact address within

the PSV area. This

corresponds exactly to

the same lower 15 bits

of the actual program

space address.

0xFFFF

0x800000

DS70283B-page 50

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

ital signal controller just before shipping the product.

This also allows the most recent firmware or a custom

4.0

FLASH PROGRAM MEMORY

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

firmware to be programmed.

RTSP is accomplished using TBLRD (table read) and

TBLWT (table write) instructions. With RTSP, the user

application can write program memory data either in

blocks or ‘rows’ of 64 instructions (192 bytes) at a time

or a single program memory word, and erase program

memory in blocks or ‘pages’ of 512 instructions (1536

bytes) at a time.

4.1

Table Instructions and Flash

Programming

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 devices contain internal Flash

program memory for storing and executing application

code. The memory is readable, writable and erasable

during normal operation over the entire VDD range.

Regardless of the method used, all programming of

Flash memory is done with the table read and table

write instructions. These allow direct read and write

access to the program memory space from the data

memory while the device is in normal operating mode.

The 24-bit target address in the program memory is

formed using bits <7:0> of the TBLPAG register and the

Effective Address (EA) from a W register specified in

the table instruction, as shown in Figure 4-1.

Flash memory can be programmed in two ways:

• In-Circuit Serial Programming™ (ICSP™)

programming capability

• Run-Time Self-Programming (RTSP)

ICSP allows

a

dsPIC33FJ32MC202/204 and

The TBLRDLand the TBLWTLinstructions are used to

read or write to bits <15:0> of program memory.

TBLRDLand TBLWTLcan access program memory in

both Word and Byte modes.

dsPIC33FJ16MC304 device to be serially programmed

while in the end application circuit. This is done with

two lines for programming clock and programming data

(one of the alternate programming pin pairs: PGC1/

PGD1, PGC2/PGD2 or PGC3/PGD3), and three other

lines for power (VDD), ground (VSS) and Master Clear

(MCLR). This allows customers to manufacture boards

with unprogrammed devices and then program the dig-

The TBLRDHand TBLWTHinstructions are used to read

or write to bits <23:16> of program memory. TBLRDH

and TBLWTHcan also access program memory in Word

or Byte mode.

FIGURE 4-1:

ADDRESSING FOR TABLE REGISTERS

24 bits

Program Counter

Using

Program Counter

0

Working Reg EA

Using

Table Instruction

1/0

TBLPAG Reg

8 bits

16 bits

User/Configuration

Space Select

Byte

Select

24-bit EA

Preliminary

DS70283B-page 51

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

4.2

RTSP Operation

4.3

Control Registers

The

dsPIC33FJ32MC202/204

and

Two SFRs are used to read and write the program

Flash memory: NVMCON and NVMKEY.

dsPIC33FJ16MC304 Flash program memory array is

organized into rows of 64 instructions or 192 bytes.

RTSP allows the user application to erase a page of

memory, which consists of eight rows (512 instructions)

at a time, and to program one row or one word at a

time. Table 23-12 shows typical erase and program-

ming times. The 8-row erase pages and single row

write rows are edge-aligned from the beginning of pro-

gram memory, on boundaries of 1536 bytes and 192

bytes, respectively.

The NVMCON register (Register 4-1) controls which

blocks are to be erased, which memory type is to be

programmed and the start of the programming cycle.

NVMKEY is a write-only register that is used for write

protection. To start a programming or erase sequence,

the user application must consecutively write 0x55 and

0xAA to the NVMKEY register. Refer to Section 4.4

“Programming Operations” for further details.

The program memory implements holding buffers that

can contain 64 instructions of programming data. Prior

to the actual programming operation, the write data

must be loaded into the buffers sequentially. The

instruction words loaded must always be from a group

of 64 boundary.

4.4

Programming Operations

A complete programming sequence is necessary for

programming or erasing the internal Flash in RTSP

mode. A programming operation is nominally 4 ms in

duration and the processor stalls (waits) until the

operation is finished. Setting the WR bit

(NVMCON<15>) starts the operation, and the WR bit is

automatically cleared when the operation is finished.

The basic sequence for RTSP programming is to set up

a Table Pointer, then do a series of TBLWTinstructions

to load the buffers. Programming is performed by

setting the control bits in the NVMCON register. A total

of 64 TBLWTL and TBLWTH instructions are required

to load the instructions.

All of the table write operations are single-word writes

(two instruction cycles) because only the buffers are

written.

A

programming cycle is required for

programming each row.

DS70283B-page 52

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 4-1:

NVMCON: FLASH MEMORY CONTROL REGISTER

R/SO-0⁽¹⁾

WR

R/W-0⁽¹⁾

WREN

R/W-0⁽¹⁾

WRERR

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

R/W-0⁽¹⁾

bit 0

U-0

—

R/W-0⁽¹⁾

ERASE

U-0

—

U-0

—

R/W-0⁽¹⁾

NVMOP<3:0>⁽²⁾

bit 7

Legend:

SO = Satiable only bit

W = Writable bit

‘1’ = Bit is set

R = Readable bit

-n = Value at POR

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

WR: Write Control bit

1= Initiates a Flash memory program or erase operation. The operation is self-timed and the bit is

cleared by hardware once operation is complete.

0= Program or erase operation is complete and inactive

bit 14

bit 13

WREN: Write Enable bit

1= Enable Flash program/erase operations

0= Inhibit Flash program/erase operations

WRERR: Write Sequence Error Flag bit

1= An improper program or erase sequence attempt or termination has occurred (bit is set

automatically on any set attempt of the WR bit)

0= The program or erase operation completed normally

bit 12-7

bit 6

Unimplemented: Read as ‘0’

ERASE: Erase/Program Enable bit

1= Perform the erase operation specified by NVMOP<3:0> on the next WR command

0= Perform the program operation specified by NVMOP<3:0> on the next WR command

bit 5-4

bit 3-0

Unimplemented: Read as ‘0’

NVMOP<3:0>: NVM Operation Select bits⁽²⁾

If ERASE = 1:

1111= Memory bulk erase operation

1101= Erase General Segment

1100= Erase Secure Segment

0011= No operation

0010= Memory page erase operation

0001= No operation

0000= Erase a single Configuration register byte

If ERASE = 0:

1111= No operation

1101= No operation

1100= No operation

0011= Memory word program operation

0010= No operation

0001= Memory row program operation

0000= Program a single Configuration register byte

Note 1: These bits can only be Reset on POR.

2: All other combinations of NVMOP<3:0> are unimplemented.

Preliminary

DS70283B-page 53

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 4-2:

NVMKEY: NONVOLATILE MEMORY KEY REGISTER

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

bit 0

W-0

bit 7

W-0

NVMKEY<7:0>

Legend:

SO = Satiable only bit

W = Writable bit

‘1’ = Bit is set

R = Readable bit

-n = Value at POR

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-8

bit 7-0

Unimplemented: Read as ‘0’

NVMKEY<7:0>: Key Register (write-only) bits

DS70283B-page 54

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

4. Write the first 64 instructions from data RAM into

the program memory buffers (see Example 4-2).

4.4.1

PROGRAMMING ALGORITHM FOR

FLASH PROGRAM MEMORY

5. Write the program block to Flash memory:

Programmers can program one row of program Flash

memory at a time. To do this, it is necessary to erase

the 8-row erase page that contains the desired row.

The general process is:

a) Set the NVMOP bits to ‘0001’ to configure

for row programming. Clear the ERASE bit

and set the WREN bit.

b) Write 0x55 to NVMKEY.

c) Write 0xAA to NVMKEY.

1. Read eight rows of program memory

(512 instructions) and store in data RAM.

d) Set the WR bit. The programming cycle

begins and the CPU stalls for the duration of

the write cycle. When the write to Flash mem-

ory is done, the WR bit is cleared

automatically.

2. Update the program data in RAM with the

desired new data.

3. Erase the block (see Example 4-1):

a) Set the NVMOP bits (NVMCON<3:0>) to

‘0010’ to configure for block erase. Set the

ERASE (NVMCON<6>) and WREN

(NVMCON<14>) bits.

6. Repeat steps 4 and 5, using the next available

64 instructions from the block in data RAM by

incrementing the value in TBLPAG, until all

512 instructions are written back to Flash memory.

b) Write the starting address of the page to be

erased into the TBLPAG and W registers.

For protection against accidental operations, the write

initiate sequence for NVMKEY must be used to allow

any erase or program operation to proceed. After the

programming command has been executed, the user

application must wait for the programming time until

programming is complete. The two instructions

following the start of the programming sequence

should be NOPs, as shown in Example 4-3.

c) Write 0x55 to NVMKEY.

d) Write 0xAA to NVMKEY.

e) Set the WR bit (NVMCON<15>). The erase

cycle begins and the CPU stalls for the dura-

tion of the erase cycle. When the erase is

done, the WR bit is cleared automatically.

EXAMPLE 4-1:

ERASING A PROGRAM MEMORY PAGE

; Set up NVMCON for block erase operation

MOV

#0x4042, W0

W0, NVMCON

;

; Initialize NVMCON

; Init pointer to row to be ERASED

MOV

#tblpage(PROG_ADDR), W0

W0, TBLPAG

#tbloffset(PROG_ADDR), W0

;

; Initialize PM Page Boundary SFR

; Initialize in-page EA[15:0] pointer

; Set base address of erase block

; Block all interrupts with priority <7

; for next 5 instructions

TBLWTL W0, [W0]

DISI

#5

MOV

BSET

NOP

#0x55, W0

W0, NVMKEY

#0xAA, W1

W1, NVMKEY

NVMCON, #WR

; Write the 55 key

;

; Write the AA key

; Start the erase sequence

; Insert two NOPs after the erase

; command is asserted

Preliminary

DS70283B-page 55

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

EXAMPLE 4-2:

LOADING THE WRITE BUFFERS

; Set up NVMCON for row programming operations

MOV

#0x4001, W0

W0, NVMCON

;

; Initialize NVMCON

; Set up a pointer to the first program memory location to be written

; program memory selected, and writes enabled

MOV

#0x0000, W0

W0, TBLPAG

#0x6000, W0

;

; Initialize PM Page Boundary SFR

; An example program memory address

; Perform the TBLWT instructions to write the latches

; 0th_program_word

MOV

#LOW_WORD_0, W2

#HIGH_BYTE_0, W3

;

TBLWTL W2, [W0]

TBLWTH W3, [W0++]

; Write PM low word into program latch

; Write PM high byte into program latch

; 1st_program_word

MOV

#LOW_WORD_1, W2

#HIGH_BYTE_1, W3

;

TBLWTL W2, [W0]

TBLWTH W3, [W0++]

; Write PM low word into program latch

; Write PM high byte into program latch

;

2nd_program_word

MOV

#LOW_WORD_2, W2

#HIGH_BYTE_2, W3

;

TBLWTL W2, [W0]

TBLWTH W3, [W0++]

; Write PM low word into program latch

; Write PM high byte into program latch

•

; 63rd_program_word

MOV

#LOW_WORD_31, W2

#HIGH_BYTE_31, W3

;

TBLWTL W2, [W0]

TBLWTH W3, [W0++]

; Write PM low word into program latch

; Write PM high byte into program latch

EXAMPLE 4-3:

INITIATING A PROGRAMMING SEQUENCE

DISI

#5

; Block all interrupts with priority <7

; for next 5 instructions

MOV

BSET

NOP

#0x55, W0

W0, NVMKEY

#0xAA, W1

W1, NVMKEY

NVMCON, #WR

; Write the 55 key

;

; Write the AA key

; Start the erase sequence

; Insert two NOPs after the

; erase command is asserted

DS70283B-page 56

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Any active source of Reset makes the SYSRST signal

5.0

RESETS

active. Many registers associated with the CPU and

peripherals are forced to a known Reset state. Most

registers are unaffected by a Reset; their status is

unknown on POR and unchanged by all other Resets.

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

Note:

Refer to the specific peripheral or CPU

section of this manual for register Reset

states.

All types of device Reset will set a corresponding status

bit in the RCON register to indicate the type of Reset

(see Register 5-1). A POR will clear all bits, except for

the POR bit (RCON<0>), that are set. The user appli-

cation can set or clear any bit at any time during code

execution. The RCON bits only serve as status bits.

Setting a particular Reset status bit in software does

not cause a device Reset to occur.

The Reset module combines all Reset sources and

controls the device Master Reset Signal, SYSRST. The

following is a list of device Reset sources:

• POR: Power-on Reset

• BOR: Brown-out Reset

The RCON register also has other bits associated with

the Watchdog Timer and device power-saving states.

The function of these bits is discussed in other sections

of this manual.

• MCLR: Master Clear Pin Reset

• SWR: RESETInstruction

• WDTO: Watchdog Timer Reset

• TRAPR: Trap Conflict Reset

Note:

The status bits in the RCON register

should be cleared after they are read so

that the next RCON register value after a

device Reset will be meaningful.

• IOPUWR: Illegal Opcode, Uninitialized W Regis-

ter Reset and Security Reset

• CM: Configuration Mismatch Reset

A simplified block diagram of the Reset module is

shown in Figure 5-1.

FIGURE 5-1:

RESET SYSTEM BLOCK DIAGRAM

RESETInstruction

Glitch Filter

MCLR

WDT

Module

Sleep or Idle

BOR

Internal

Regulator

SYSRST

VDD

POR

VDD Rise

Detect

Trap Conflict

Illegal Opcode

Uninitialized W Register

Configuration Mismatch

Preliminary

DS70283B-page 57

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 5-1:

RCON: RESET CONTROL REGISTER⁽¹⁾

R/W-0

TRAPR

bit 15

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

CM

R/W-0

IOPUWR

VREGS

bit 8

R/W-0

EXTR

R/W-0

SWR

R/W-0

SWDTEN⁽²⁾

R/W-0

WDTO

R/W-0

IDLE

R/W-1

BOR

R/W-1

POR

SLEEP

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

-n = Value at POR

bit 15

bit 14

TRAPR: Trap Reset Flag bit

1= A Trap Conflict Reset has occurred

0= A Trap Conflict Reset has not occurred

IOPUWR: Illegal Opcode or Uninitialized W Access Reset Flag bit

1= An illegal opcode detection, an illegal address mode or uninitialized W register used as an

Address Pointer caused a Reset

0= An illegal opcode or uninitialized W Reset has not occurred

bit 13-10

bit 9

Unimplemented: Read as ‘0’

CM: Configuration Mismatch Flag bit

1 = A configuration mismatch Reset has occurred.

0 = A configuration mismatch Reset has NOT occurred.

bit 8

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

VREGS: Voltage Regulator Standby During Sleep bit

1= Voltage regulator is active during Sleep

0= Voltage regulator goes into Standby mode during Sleep

EXTR: External Reset (MCLR) Pin bit

1= A Master Clear (pin) Reset has occurred

0= A Master Clear (pin) Reset has not occurred

SWR: Software Reset (Instruction) Flag bit

1= A RESETinstruction has been executed

0= A RESETinstruction has not been executed

SWDTEN: Software Enable/Disable of WDT bit⁽²⁾

1= WDT is enabled

0= WDT is disabled

WDTO: Watchdog Timer Time-out Flag bit

1= WDT time-out has occurred

0= WDT time-out has not occurred

SLEEP: Wake-up from Sleep Flag bit

1= Device has been in Sleep mode

0= Device has not been in Sleep mode

IDLE: Wake-up from Idle Flag bit

1= Device was in Idle mode

0= Device was not in Idle mode

Note 1: All of the Reset status bits can be set or cleared in software. Setting one of these bits in software does not

cause a device Reset.

2: If the FWDTEN Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled, regardless of the

SWDTEN bit setting.

DS70283B-page 58

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 5-1:

RCON: RESET CONTROL REGISTER⁽¹⁾

bit 1

BOR: Brown-out Reset Flag bit

1= A Brown-out Reset has occurred

0= A Brown-out Reset has not occurred

bit 0

POR: Power-on Reset Flag bit

1= A Power-up Reset has occurred

0= A Power-up Reset has not occurred

Note 1: All of the Reset status bits can be set or cleared in software. Setting one of these bits in software does not

cause a device Reset.

2: If the FWDTEN Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled, regardless of the

SWDTEN bit setting.

TABLE 5-1:

RESET FLAG BIT OPERATION

Flag Bit Setting Event

Trap conflict event

Clearing Event

TRAPR (RCON<15>)

IOPUWR (RCON<14>)

POR, BOR

Illegal opcode or uninitialized

W register access

CM (RCON<9>)

Configuration mismatch

MCLR Reset

POR, BOR

POR

EXTR (RCON<7>)

SWR (RCON<6>)

WDTO (RCON<4>)

RESETinstruction

WDT time-out

POR, BOR

PWRSAVinstruction, POR, BOR,

CLRWDTinstruction

SLEEP (RCON<3>)

IDLE (RCON<2>)

BOR (RCON<1>)

POR (RCON<0>)

PWRSAV #SLEEPinstruction

POR, BOR

PWRSAV #IDLEinstruction

POR, BOR

BOR

POR

—

Note: All Reset flag bits may be set or cleared by the user software.

Preliminary

DS70283B-page 59

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

5.1

Clock Source Selection at Reset

5.2

Device Reset Times

If clock switching is enabled, the system clock source at

device Reset is chosen as shown in Table 5-2. If clock

switching is disabled, the system clock source is always

selected according to the oscillator Configuration bits.

Refer to Section 7.0 “Oscillator Configuration” for

further details.

The Reset times for various types of device Reset are

summarized in Table 5-3. The system Reset signal,

SYSRST, is released after the POR and PWRT delay

times expire.

The time at which the device actually begins to execute

code also depends on the system oscillator delays,

which include the Oscillator Start-up Timer (OST) and

the Phase-Locked Loop (PLL) lock time. The OST and

PLL lock times occur in parallel with the applicable

SYSRST delay times.

TABLE 5-2:

OSCILLATOR SELECTION vs.

TYPE OF RESET (CLOCK

SWITCHING ENABLED)

The FSCM delay determines the time at which the

FSCM begins to monitor the system clock source after

the SYSRST signal is released.

Reset Type

Clock Source Determinant

POR

BOR

Oscillator Configuration bits

(FNOSC<2:0>)

MCLR

WDTR

SWR

COSC Control bits

(OSCCON<14:12>)

TABLE 5-3:

Reset Type

POR

RESET DELAY TIMES FOR VARIOUS DEVICE RESETS

System Clock

Delay

FSCM

Delay

Clock Source

SYSRST Delay

Notes

1, 2, 3

EC, FRC, LPRC

ECPLL, FRCPLL

XT, HS, SOSC

XTPLL, HSPLL

EC, FRC, LPRC

ECPLL, FRCPLL

XT, HS, SOSC

XTPLL, HSPLL

Any Clock

TPOR + TSTARTUP + TRST

TSTARTUP + TRST

TRST

—

TFSCM

—

TLOCK

1, 2, 3, 5, 6

TOST

1, 2, 3, 4, 6

TOST + TLOCK

1, 2, 3, 4, 5, 6

BOR

—

3

TLOCK

TFSCM

—

3, 5, 6

TOST

3, 4, 6

TOST + TLOCK

3, 4, 5, 6

MCLR

—

3

WDT

Any Clock

TRST

—

Software

Any Clock

TRST

—

Illegal Opcode

Uninitialized W

Trap Conflict

Any Clock

TRST

—

Any Clock

TRST

—

Any Clock

TRST

—

Note 1: TPOR = Power-on Reset delay (10 μs nominal).

2: TSTARTUP = Conditional POR delay of 20 μs nominal (if on-chip regulator is enabled) or 64 ms nominal

Power-up Timer delay (if regulator is disabled). TSTARTUP is also applied to all returns from powered-down

states, including waking from Sleep mode, only if the regulator is enabled.

3: TRST = Internal state Reset time (20 μs nominal).

4: TOST = Oscillator Start-up Timer. A 10-bit counter counts 1024 oscillator periods before releasing the

oscillator clock to the system.

5: TLOCK = PLL lock time (20 μs nominal).

6: TFSCM = Fail-Safe Clock Monitor delay (100 μs nominal).

DS70283B-page 60

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

5.2.1

POR AND LONG OSCILLATOR

START-UP TIMES

5.2.2.1

FSCM Delay for Crystal and PLL

Clock Sources

The oscillator start-up circuitry and its associated delay

timers are not linked to the device Reset delays that

occur at power-up. Some crystal circuits (especially

low-frequency crystals) have a relatively long start-up

time. Therefore, one or more of the following conditions

is possible after SYSRST is released:

When the system clock source is provided by a crystal

oscillator and/or the PLL, a short delay, TFSCM, is

automatically inserted after the POR and PWRT delay

times. The FSCM does not begin to monitor the system

clock source until this delay expires. The FSCM delay

time is nominally 500 μs and provides additional time

for the oscillator and/or PLL to stabilize. In most cases,

the FSCM delay prevents an oscillator failure trap at a

device Reset when the PWRT is disabled.

• The oscillator circuit has not begun to oscillate.

• The Oscillator Start-up Timer has not expired (if a

crystal oscillator is used).

• The PLL has not achieved a lock (if PLL is used).

5.3

Special Function Register Reset

States

The device will not begin to execute code until a valid

clock source has been released to the system.

Therefore, the oscillator and PLL start-up delays must

be considered when the Reset delay time must be

known.

Most of the Special Function Registers (SFRs)

associated with the CPU and peripherals are reset to a

particular value at a device Reset. The SFRs are

grouped by their peripheral or CPU function, and their

Reset values are specified in each section of this manual.

5.2.2

FAIL-SAFE CLOCK MONITOR

(FSCM) AND DEVICE RESETS

The Reset value for each SFR does not depend on the

type of Reset, with the exception of two registers:

If the FSCM is enabled, it begins to monitor the system

clock source when SYSRST is released. If a valid clock

source is not available at this time, the device

automatically switches to the FRC oscillator and the

user application can switch to the desired crystal

oscillator in the Trap Service Routine.

• The Reset value for the Reset Control register,

RCON, depends on the type of device Reset.

• The Reset value for the Oscillator Control

register, OSCCON, depends on the type of Reset

and the programmed values of the Oscillator

Configuration bits in the FOSC Configuration

register.

Preliminary

DS70283B-page 61

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 62

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

6.1.1

ALTERNATE INTERRUPT VECTOR

TABLE

6.0

INTERRUPT CONTROLLER

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

The Alternate Interrupt Vector Table (AIVT) is located

after the IVT, as shown in Figure 6-1. Access to the

AIVT is provided by the ALTIVT control bit

(INTCON2<15>). If the ALTIVT bit is set, all interrupt

and exception processes use the alternate vectors

instead of the default vectors. The alternate vectors are

organized in the same manner as the default vectors.

The AIVT supports debugging by providing a means to

switch between an application and

a

support

environment without requiring the interrupt vectors to

be reprogrammed. This feature also enables switching

between applications for evaluation of different

software algorithms at run time. If the AIVT is not

needed, the AIVT should be programmed with the

same addresses used in the IVT.

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 interrupt controller reduces the

numerous peripheral interrupt request signals to a sin-

gle interrupt request signal to the dsPIC33FJ32MC202/

204 and dsPIC33FJ16MC304 CPU. It has the following

features:

• Up to 8 processor exceptions and software traps

• 7 user-selectable priority levels

6.2

Reset Sequence

A device Reset is not a true exception because the

interrupt controller is not involved in the Reset process.

The

dsPIC33FJ16MC304 device clears its registers in

response to a Reset, which forces the PC to zero. The

digital signal controller then begins program execution

at location 0x000000. A GOTOinstruction at the Reset

address can redirect program execution to the

appropriate start-up routine.

• Interrupt Vector Table (IVT) with up to 118 vectors

• A unique vector for each interrupt or exception

source

dsPIC33FJ32MC202/204

and

• Fixed priority within a specified user priority level

• Alternate Interrupt Vector Table (AIVT) for debug

support

• Fixed interrupt entry and return latencies

6.1

Interrupt Vector Table

Note: Any unimplemented or unused vector

locations in the IVT and AIVT should be

programmed with the address of a default

interrupt handler routine that contains a

RESETinstruction.

The Interrupt Vector Table (IVT) is shown in Figure 6-1.

The IVT resides in program memory, starting at location

000004h. The IVT contains 126 vectors consisting of

8 nonmaskable trap vectors plus up to 118 sources of

interrupt. In general, each interrupt source has its own

vector. Each interrupt vector contains a 24-bit-wide

address. The value programmed into each interrupt

vector location is the starting address of the associated

Interrupt Service Routine (ISR).

Interrupt vectors are prioritized in terms of their natural

priority. This priority is linked to their position in the

vector table. Lower addresses generally have a higher

natural priority. For example, the interrupt associated

with vector 0 will take priority over interrupts at any

other vector address.

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices implement up to 26 unique interrupts and 4

nonmaskable traps. These are summarized in Table 6-

1 and Table 6-2.

Preliminary

DS70283B-page 63

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 6-1:

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 INTERRUPT VECTOR TABLE

Reset – GOTOInstruction

Reset – GOTOAddress

Reserved

0x000000

0x000002

0x000004

Oscillator Fail Trap Vector

Address Error Trap Vector

Stack Error Trap Vector

Math Error Trap Vector

Reserved

Interrupt Vector 0

Interrupt Vector 1

~

0x000014

~

Interrupt Vector 52

Interrupt Vector 53

Interrupt Vector 54

~

0x00007C

0x00007E

0x000080

(1)

Interrupt Vector Table (IVT)

~

Interrupt Vector 116

Interrupt Vector 117

Reserved

0x0000FC

0x0000FE

0x000100

0x000102

Reserved

Oscillator Fail Trap Vector

Address Error Trap Vector

Stack Error Trap Vector

Math Error Trap Vector

Reserved

Interrupt Vector 0

Interrupt Vector 1

~

0x000114

~

(1)

Alternate Interrupt Vector Table (AIVT)

Interrupt Vector 52

Interrupt Vector 53

Interrupt Vector 54

~

0x00017C

0x00017E

0x000180

~

Interrupt Vector 116

Interrupt Vector 117

Start of Code

0x0001FE

0x000200

Note 1: See Table 6-1 for the list of implemented interrupt vectors.

DS70283B-page 64

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 6-1:

INTERRUPT VECTORS

Interrupt

Vector

Number

Request(IRQ)

Number

IVT Address

AIVT Address

Interrupt Source

INT0 – External Interrupt 0

8

0

0x000014

0x000016

0x000018

0x00001A

0x00001C

0x00001E

0x000020

0x000022

0x000024

0x000026

0x000028

0x00002A

0x00002C

0x00002E

0x000030

0x000032

0x000034

0x000036

0x000038

0x00003A

0x00003C

0x00003E

0x000040

0x000042

0x000044

0x000046

0x000048

0x00004A

0x00004C

0x00004E

0x000050

0x000052

0x000054

0x000056

0x000058

0x00005A

0x00005C

0x00005E

0x000060

0x000062

0x000064

0x000066

0x000068

0x00006A

0x00006C

0x00006E

0x000114

0x000116

0x000118

0x00011A

0x00011C

0x00011E

0x000120

0x000122

0x000124

0x000126

0x000128

0x00012A

0x00012C

0x00012E

0x000130

0x000132

0x000134

0x000136

0x000138

0x00013A

0x00013C

0x00013E

0x000140

0x000142

0x000144

0x000146

0x000148

0x00014A

0x00014C

0x00014E

0x000150

0x000152

0x000154

0x000156

0x000158

0x00015A

0x00015C

0x00015E

0x000160

0x000162

0x000164

0x000166

0x000168

0x00016A

0x00016C

0x00016E

9

1

IC1 – Input Compare 1

OC1 – Output Compare 1

T1 – Timer1

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

2

3

4

Reserved

5

IC2 – Input Capture 2

OC2 – Output Compare 2

T2 – Timer2

6

7

8

T3 – Timer3

9

SPI1E – SPI1 Error

SPI1 – SPI1 Transfer Done

U1RX – UART1 Receiver

U1TX – UART1 Transmitter

ADC1 – ADC 1

Reserved

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

Reserved

SI2C1 – I2C1 Slave Events

MI2C1 – I2C1 Master Events

Reserved

Change Notification Interrupt

INT1 – External Interrupt 1

Reserved

IC7 – Input Capture 7

IC8 – Input Capture 8

Reserved

INT2 – External Interrupt 2

Reserved

Preliminary

DS70283B-page 65

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 6-1:

INTERRUPT VECTORS (CONTINUED)

Interrupt

Vector

Number

Request(IRQ)

Number

IVT Address

AIVT Address

Interrupt Source

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83-125

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75-117

0x000070

0x000072

0x000074

0x000076

0x000078

0x00007A

0x00007C

0x00007E

0x000080

0x000082

0x000084

0x000086

0x000088

0x00008A

0x00008C

0x00008E

0x000090

0x000092

0x000094

0x000096

0x000098

0x00009A

0x00009C

0x00009E

0x0000A0

0x0000A2

0x0000B0

0x0000B2

0x000086

0x000170

0x000172

0x000174

0x000176

0x000178

0x00017A

0x00017C

0x00017E

0x000180

0x000182

0x000184

0x000186

0x000188

0x00018A

0x00018C

0x00018E

0x000190

0x000192

0x000194

0x000196

0x000198

0x00019A

0x00019C

0x00019E

0x0001A0

0x0001A2

0x0001B0

0x0001B2

0x000186

Reserved

PWM1 – PWM1 Period Match

QEI – Position Counter Compare

Reserved

FLTA1 – PWM1 Fault A

Reserved

U1E – UART1 Error

Reserved

PWM2 – PWM2 Period Match

FLTA2 – PWM2 Fault A

Reserved

0x0000A4-

0x0000FE

0x0001A4-

0x0001FE

TABLE 6-2:

TRAP VECTORS

Vector Number

IVT Address

AIVT Address

Trap Source

0

1

2

3

4

5

6

7

0x000004

0x000006

0x000008

0x00000A

0x00000C

0x00000E

0x000010

0x000012

0x000104

0x000106

0x000108

0x00010A

0x00010C

0x00010E

0x000110

0x000112

Reserved

Oscillator Failure

Address Error

Stack Error

Math Error

Reserved

DS70283B-page 66

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

6.3.4

IPC0–IPC18

6.3

Interrupt Control and Status

Registers

The IPC registers are used to set the interrupt priority

level for each source of interrupt. Each user interrupt

source can be assigned to one of eight priority levels.

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices implement a total of 22 registers for the inter-

rupt controller:

6.3.5

INTTREG

• INTCON1

• INTCON2

• IFSx

The INTTREG register contains the associated

interrupt vector number and the new CPU interrupt

priority level, which are latched into vector number

(VECNUM<6:0>) and Interrupt level (ILR<3:0>) bit

fields in the INTTREG register. The new interrupt

priority level is the priority of the pending interrupt.

• IECx

• IPCx

• INTTREG

The interrupt sources are assigned to the IFSx, IECx

and IPCx registers in the same sequence that they are

listed in Table 6-1. For example, the INT0 (External

Interrupt 0) is shown as having vector number 8 and a

natural order priority of 0. Thus, the INT0IF bit is found

in IFS0<0>, the INT0IE bit in IEC0<0>, and the INT0IP

bits in the first position of IPC0 (IPC0<2:0>).

6.3.1

INTCON1 AND INTCON2

Global interrupt control functions are controlled from

INTCON1 and INTCON2. INTCON1 contains the

Interrupt Nesting Disable (NSTDIS) bit as well as the

control and status flags for the processor trap sources.

The INTCON2 register controls the external interrupt

request signal behavior and the use of the Alternate

Interrupt Vector Table.

6.3.6

STATUS/CONTROL REGISTERS

Although they are not specifically part of the interrupt

control hardware, two of the CPU Control registers

contain bits that control interrupt functionality.

6.3.2

IFS0–IFS4

The IFS registers maintain all of the interrupt request

flags. Each source of interrupt has a status bit, which is

set by the respective peripherals or external signal and

is cleared via software.

• The CPU STATUS register, SR, contains the

IPL<2:0> bits (SR<7:5>). These bits indicate the

current CPU interrupt priority level. The user can

change the current CPU priority level by writing to

the IPL bits.

6.3.3

IEC0–IEC4

• The CORCON register contains the IPL3 bit

which, together with IPL<2:0>, also indicates the

current CPU priority level. IPL3 is a read-only bit

so that trap events cannot be masked by the user

software.

The IEC registers maintain all of the interrupt enable

bits. These control bits are used to individually enable

interrupts from the peripherals or external signals.

All Interrupt registers are described in Register 6-1

through Register 6-24 in the following pages.

Preliminary

DS70283B-page 67

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-1:

SR: CPU STATUS REGISTER⁽¹⁾

R-0

OA

R-0

OB

R/C-0

SA

R/C-0

SB

R-0

R/C-0

SAB

R -0

DA

R/W-0

DC

OAB

bit 15

bit 8

R/W-0⁽³⁾

IPL2⁽²⁾

bit 7

R/W-0⁽³⁾

IPL1⁽²⁾

R/W-0⁽³⁾

IPL0⁽²⁾

R-0

RA

R/W-0

N

R/W-0

OV

R/W-0

Z

R/W-0

C

bit 0

Legend:

C = Clear only bit

S = Set only bit

‘1’ = Bit is set

R = Readable bit

W = Writable bit

‘0’ = Bit is cleared

U = Unimplemented bit, read as ‘0’

-n = Value at POR

x = Bit is unknown

bit 7-5

IPL<2:0>: CPU Interrupt Priority Level Status bits⁽¹⁾

111= CPU Interrupt Priority Level is 7 (15), user interrupts disabled

110= CPU Interrupt Priority Level is 6 (14)

101= CPU Interrupt Priority Level is 5 (13)

100= CPU Interrupt Priority Level is 4 (12)

011= CPU Interrupt Priority Level is 3 (11)

010= CPU Interrupt Priority Level is 2 (10)

001= CPU Interrupt Priority Level is 1 (9)

000= CPU Interrupt Priority Level is 0 (8)

Note 1: For complete register details, see Register 2-1: “SR: CPU STATUS Register”.

2: The IPL<2:0> bits are concatenated with the IPL<3> bit (CORCON<3>) to form the CPU Interrupt Priority

Level. The value in parentheses indicates the IPL if IPL<3> = 1. User interrupts are disabled when

IPL<3> = 1.

3: The IPL<2:0> Status bits are read-only when NSTDIS (INTCON1<15>) = 1.

REGISTER 6-2:

CORCON: CORE CONTROL REGISTER⁽¹⁾

U-0

—

U-0

—

U-0

—

R/W-0

US

R/W-0

EDT

R-0

DL<2:0>

bit 15

bit 8

R/W-0

SATA

R/W-0

SATB

R/W-1

R/W-0

R/C-0

IPL3⁽²⁾

R/W-0

PSV

R/W-0

RND

R/W-0

IF

SATDW

ACCSAT

bit 7

bit 0

Legend:

C = Clear only bit

W = Writable bit

‘x = Bit is unknown

R = Readable bit

0’ = Bit is cleared

-n = Value at POR

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

bit 3

IPL3: CPU Interrupt Priority Level Status bit 3⁽²⁾

1= CPU interrupt priority level is greater than 7

0= CPU interrupt priority level is 7 or less

Note 1: For complete register details, see Register 2-2: “CORCON: CORE Control Register”.

2: The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU Interrupt Priority Level.

DS70283B-page 68

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-3:

INTCON1: INTERRUPT CONTROL REGISTER 1

R/W-0

NSTDIS

OVAERR

OVBERR

COVAERR COVBERR

OVATE

OVBTE

COVTE

bit 15

bit 8

R/W-0

U-0

—

R/W-0

U-0

—

SFTACERR

DIV0ERR

MATHERR ADDRERR

STKERR

OSCFAIL

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

-n = Value at POR

bit 15

bit 14

bit 13

bit 12

bit 11

bit 10

bit 9

NSTDIS: Interrupt Nesting Disable bit

1= Interrupt nesting is disabled

0= Interrupt nesting is enabled

OVAERR: Accumulator A Overflow Trap Flag bit

1= Trap was caused by overflow of Accumulator A

0= Trap was not caused by overflow of Accumulator A

OVBERR: Accumulator B Overflow Trap Flag bit

1= Trap was caused by overflow of Accumulator B

0= Trap was not caused by overflow of Accumulator B

COVAERR: Accumulator A Catastrophic Overflow Trap Enable bit

1= Trap was caused by catastrophic overflow of Accumulator A

0= Trap was not caused by catastrophic overflow of Accumulator A

COVBERR: Accumulator B Catastrophic Overflow Trap Enable bit

1= Trap was caused by catastrophic overflow of Accumulator B

0= Trap was not caused by catastrophic overflow of Accumulator B

OVATE: Accumulator A Overflow Trap Enable bit

1= Trap overflow of Accumulator A

0= Trap disabled

OVBTE: Accumulator B Overflow Trap Enable bit

1= Trap overflow of Accumulator B

0= Trap disabled

bit 8

COVTE: Catastrophic Overflow Trap Enable bit

1= Trap on catastrophic overflow of Accumulator A or B enabled

0= Trap disabled

bit 7

SFTACERR: Shift Accumulator Error Status bit

1= Math error trap was caused by an invalid accumulator shift

0= Math error trap was not caused by an invalid accumulator shift

bit 6

DIV0ERR: Arithmetic Error Status bit

1= Math error trap was caused by a divide by zero

0= Math error trap was not caused by a divide by zero

bit 5

bit 4

Unimplemented: Read as ‘0’

MATHERR: Arithmetic Error Status bit

1= Math error trap has occurred

0= Math error trap has not occurred

bit 3

ADDRERR: Address Error Trap Status bit

1= Address error trap has occurred

0= Address error trap has not occurred

Preliminary

DS70283B-page 69

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-3:

INTCON1: INTERRUPT CONTROL REGISTER 1 (CONTINUED)

bit 2

bit 1

bit 0

STKERR: Stack Error Trap Status bit

1= Stack error trap has occurred

0= Stack error trap has not occurred

OSCFAIL: Oscillator Failure Trap Status bit

1= Oscillator failure trap has occurred

0= Oscillator failure trap has not occurred

Unimplemented: Read as ‘0’

DS70283B-page 70

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-4:

INTCON2: INTERRUPT CONTROL REGISTER 2

R/W-0

R-0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

ALTIVT

DISI

bit 15

bit 8

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

INT2EP

INT1EP

INT0EP

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

bit 14

ALTIVT: Enable Alternate Interrupt Vector Table bit

1= Use alternate vector table

0= Use standard (default) vector table

DISI: DISIInstruction Status bit

1= DISIinstruction is active

0= DISIinstruction is not active

bit 13-3

bit 2

Unimplemented: Read as ‘0’

INT2EP: External Interrupt 2 Edge Detect Polarity Select bit

1= Interrupt on negative edge

0= Interrupt on positive edge

bit 1

bit 0

INT1EP: External Interrupt 1 Edge Detect Polarity Select bit

1= Interrupt on negative edge

0= Interrupt on positive edge

INT0EP: External Interrupt 0 Edge Detect Polarity Select bit

1= Interrupt on negative edge

0= Interrupt on positive edge

Preliminary

DS70283B-page 71

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-5:

IFS0: INTERRUPT FLAG STATUS REGISTER 0

U-0

—

U-0

—

R/W-0

AD1IF

R/W-0

SPI1IF

R/W-0

T3IF

U1TXIF

U1RXIF

SPI1EIF

bit 15

bit 8

R/W-0

T2IF

R/W-0

OC2IF

R/W-0

IC2IF

U-0

—

R/W-0

T1IF

R/W-0

OC1IF

R/W-0

IC1IF

R/W-0

INT0IF

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-14

bit 13

Unimplemented: Read as ‘0’

AD1IF: ADC1 Conversion Complete Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 12

bit 11

bit 10

bit 9

U1TXIF: UART1 Transmitter Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

U1RXIF: UART1 Receiver Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

SPI1IF: SPI1 Event Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

SPI1EIF: SPI1 Fault Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 8

T3IF: Timer3 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 7

T2IF: Timer2 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 6

OC2IF: Output Compare Channel 2 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 5

IC2IF: Input Capture Channel 2 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 4

bit 3

Unimplemented: Read as ‘0’

T1IF: Timer1 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 2

OC1IF: Output Compare Channel 1 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

DS70283B-page 72

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-5:

IFS0: INTERRUPT FLAG STATUS REGISTER 0 (CONTINUED)

bit 1

IC1IF: Input Capture Channel 1 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 0

INT0IF: External Interrupt 0 Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

Preliminary

DS70283B-page 73

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-6:

IFS1: INTERRUPT FLAG STATUS REGISTER 1

U-0

—

U-0

—

R/W-0

INT2IF

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

R/W-0

IC8IF

R/W-0

IC7IF

U-0

—

R/W-0

INT1IF

R/W-0

CNIF

U-0

—

R/W-0

MI2C1IF

SI2C1IF

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-14

bit 13

Unimplemented: Read as ‘0’

INT2IF: External Interrupt 2 Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 12-8

bit 7

Unimplemented: Read as ‘0’

IC8IF: Input Capture Channel 8 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 6

IC7IF: Input Capture Channel 7 Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 5

bit 4

Unimplemented: Read as ‘0’

INT1IF: External Interrupt 1 Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 3

CNIF: Input Change Notification Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 2

bit 1

Unimplemented: Read as ‘0’

MI2C1IF: I2C1 Master Events Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 0

SI2C1IF: I2C1 Slave Events Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

DS70283B-page 74

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-7:

IFS3: INTERRUPT FLAG STATUS REGISTER 3

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

QEIIF

R/W-0

U-0

—

FLTA1IF

PWM1IF

bit 15

bit 8

bit 0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

FLTA1IF: PWM1 Fault A Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 14-11

bit 10

Unimplemented: Read as ‘0’

QEIIF: QEI Event Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 9

PWM1IF: PWM1 Error Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 8-0

Unimplemented: Read as ‘0’

Preliminary

DS70283B-page 75

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-8:

IFS4: INTERRUPT FLAG STATUS REGISTER 4

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

U-0

—

FLTA2IF

PWM2IF

bit 15

bit 8

bit 0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U1EIF

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-11

bit 10

Unimplemented: Read as ‘0’

FLTA2IF: PWM2 Fault A Interrupt Flag Status bit

1 = Interrupt request has occurred

0 = Interrupt request has not occurred

bit 9

PWM2IF: PWM2 Error Interrupt Enable bit

1 = Interrupt request has occurred

0 = Interrupt request has not occurred

bit 8-2

bit 1

Unimplemented: Read as ‘0’

U1EIF: UART1 Error Interrupt Flag Status bit

1= Interrupt request has occurred

0= Interrupt request has not occurred

bit 0

Unimplemented: Read as ‘0’

DS70283B-page 76

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-9:

IEC0: INTERRUPT ENABLE CONTROL REGISTER 0

U-0

—

U-0

—

R/W-0

AD1IE

R/W-0

T3IE

U1TXIE

U1RXIE

SPI1IE

SPI1EIE

bit 15

bit 8

R/W-0

T2IE

R/W-0

OC2IE

R/W-0

IC2IE

U-0

—

R/W-0

T1IE

R/W-0

OC1IE

R/W-0

IC1IE

R/W-0

INT0IE

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-14

bit 13

Unimplemented: Read as ‘0’

AD1IE: ADC1 Conversion Complete Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 12

bit 11

bit 10

bit 9

U1TXIE: UART1 Transmitter Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

U1RXIE: UART1 Receiver Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

SPI1IE: SPI1 Event Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

SPI1EIE: SPI1 Event Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 8

T3IE: Timer3 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 7

T2IE: Timer2 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 6

OC2IE: Output Compare Channel 2 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 5

IC2IE: Input Capture Channel 2 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 4

bit 3

Unimplemented: Read as ‘0’

T1IE: Timer1 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 2

OC1IE: Output Compare Channel 1 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

Preliminary

DS70283B-page 77

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-9:

IEC0: INTERRUPT ENABLE CONTROL REGISTER 0 (CONTINUED)

bit 1

bit 0

IC1IE: Input Capture Channel 1 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

INT0IE: External Interrupt 0 Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

DS70283B-page 78

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-10: IEC1: INTERRUPT ENABLE CONTROL REGISTER 1

U-0

—

U-0

—

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

INT2IE

bit 15

bit 8

R/W-0

IC8IE

R/W-0

IC7IE

U-0

—

U-0

—

R/W-0

INT1IE

CNIE

MI2C1IE

SI2C1IE

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-14

bit 13

Unimplemented: Read as ‘0’

INT2IE: External Interrupt 2 Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 12-8

bit 7

Unimplemented: Read as ‘0’

IC8IE: Input Capture Channel 8 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 6

IC7IE: Input Capture Channel 7 Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 5

bit 4

Unimplemented: Read as ‘0’

INT1IE: External Interrupt 1 Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 3

CNIE: Input Change Notification Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 2

bit 1

Unimplemented: Read as ‘0’

MI2C1IE: I2C1 Master Events Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 0

SI2C1IE: I2C1 Slave Events Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

Preliminary

DS70283B-page 79

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-11: IEC3: INTERRUPT ENABLE CONTROL REGISTER 3

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

QEIIE

R/W-0

U-0

—

FLTA1IE

PWM1IE

bit 15

bit 8

bit 0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

FLTA1IE: PWM1 Fault A Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 14-11

bit 10

Unimplemented: Read as ‘0’

QEIIE: QEI Event Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 9

PWM1IE: PWM1 Error Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 8-0

Unimplemented: Read as ‘0’

DS70283B-page 80

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-12: IEC4: INTERRUPT ENABLE CONTROL REGISTER 4

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

U-0

—

FLA2IE

PWM2IE

bit 15

bit 8

bit 0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

U1EIE

U-0

—

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-11

bit 10

Unimplemented: Read as ‘0’

FLA2IE: PWM2 Fault A Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 9

PWM2IE: PWM2 Error Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 8-2

bit 1

Unimplemented: Read as ‘0’

U1EIE: UART1 Error Interrupt Enable bit

1= Interrupt request enabled

0= Interrupt request not enabled

bit 0

Unimplemented: Read as ‘0’

Preliminary

DS70283B-page 81

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-13: IPC0: INTERRUPT PRIORITY CONTROL REGISTER 0

U-0

—

R/W-1

R/W-0

U-0

—

R/W-1

R/W-0

bit 8

R/W-0

T1IP<2:0>

OC1IP<2:0>

bit 15

U-0

—

R/W-1

R/W-0

U-0

—

R/W-1

R/W-0

IC1IP<2:0>

INT0IP<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

Unimplemented: Read as ‘0’

T1IP<2:0>: Timer1 Interrupt Priority bits

bit 14-12

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 11

Unimplemented: Read as ‘0’

bit 10-8

OC1IP<2:0>: Output Compare Channel 1 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 7

Unimplemented: Read as ‘0’

bit 6-4

IC1IP<2:0>: Input Capture Channel 1 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3

Unimplemented: Read as ‘0’

bit 2-0

INT0IP<2:0>: External Interrupt 0 Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

DS70283B-page 82

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-14: IPC1: INTERRUPT PRIORITY CONTROL REGISTER 1

U-0

—

R/W-1

R/W-0

U-0

—

R/W-1

R/W-0

bit 8

T2IP<2:0>

OC2IP<2:0>

bit 15

U-0

—

R/W-1

R/W-0

U-0

—

U-1

—

U-0

—

U-0

—

IC2IP<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

Unimplemented: Read as ‘0’

T2IP<2:0>: Timer2 Interrupt Priority bits

bit 14-12

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 11

Unimplemented: Read as ‘0’

bit 10-8

OC2IP<2:0>: Output Compare Channel 2 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 7

Unimplemented: Read as ‘0’

bit 6-4

IC2IP<2:0>: Input Capture Channel 2 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3-0

Unimplemented: Read as ‘0’

Preliminary

DS70283B-page 83

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-15: IPC2: INTERRUPT PRIORITY CONTROL REGISTER 2

U-0

—

R/W-1

R/W-0

U-0

—

R/W-1

R/W-0

bit 8

R/W-0

U1RXIP<2:0>

SPI1IP<2:0>

bit 15

U-0

—

R/W-1

R/W-0

U-0

—

R/W-1

R/W-0

SPI1EIP<2:0>

T3IP<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

Unimplemented: Read as ‘0’

bit 14-12

U1RXIP<2:0>: UART1 Receiver Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 11

Unimplemented: Read as ‘0’

bit 10-8

SPI1IP<2:0>: SPI1 Event Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 7

Unimplemented: Read as ‘0’

bit 6-4

SPI1EIP<2:0>: SPI1 Error Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3

Unimplemented: Read as ‘0’

bit 2-0

T3IP<2:0>: Timer3 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

DS70283B-page 84

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-16: IPC3: INTERRUPT PRIORITY CONTROL REGISTER 3

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-1

—

R/W-0

—

R/W-0

—

bit 15

bit 8

U-0

—

R/W-1

R/W-0

U-0

—

R/W-1

R/W-0

AD1IP<2:0>

U1TXIP<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-7

bit 6-4

Unimplemented: Read as ‘0’

AD1IP<2:0>: ADC1 Conversion Complete Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3

Unimplemented: Read as ‘0’

bit 2-0

U1TXIP<2:0>: UART1 Transmitter Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

Preliminary

DS70283B-page 85

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-17: IPC4: INTERRUPT PRIORITY CONTROL REGISTER 4

U-0

—

R/W-1

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

CNIP<2:0>

bit 15

bit 8

U-0

—

R/W-1

R/W-0

U-0

—

R/W-1

R/W-0

MI2C1IP<2:0>

SI2C1IP<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

Unimplemented: Read as ‘0’

bit 14-12

CNIP<2:0>: Change Notification Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 11-7

bit 6-4

Unimplemented: Read as ‘0’

MI2C1IP<2:0>: I2C1 Master Events Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3

Unimplemented: Read as ‘0’

bit 2-0

SI2C1IP<2:0>: I2C1 Slave Events Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

DS70283B-page 86

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-18: IPC5: INTERRUPT PRIORITY CONTROL REGISTER 5

U-0

—

R/W-1

R/W-0

U-0

—

R/W-1

R/W-0

bit 8

R/W-0

IC8IP<2:0>

IC7IP<2:0>

bit 15

U-0

—

U-1

—

U-0

—

U-0

—

U-0

—

R/W-1

R/W-0

INT1IP<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

Unimplemented: Read as ‘0’

bit 14-12

IC8IP<2:0>: Input Capture Channel 8 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 11

Unimplemented: Read as ‘0’

bit 10-8

IC7IP<2:0>: Input Capture Channel 7 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 7-3

bit 2-0

Unimplemented: Read as ‘0’

INT1IP<2:0>: External Interrupt 1 Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

Preliminary

DS70283B-page 87

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-19: IPC7: INTERRUPT PRIORITY CONTROL REGISTER 7

U-0

—

U-1

—

U-0

—

U-0

—

U-0

—

U-1

—

U-0

—

U-0

—

bit 15

bit 8

bit 0

U-0

—

R/W-1

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

INT2IP<2:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-7

bit 6-4

Unimplemented: Read as ‘0’

INT2IP<2:0>: External Interrupt 2 Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3-0

Unimplemented: Read as ‘0’

DS70283B-page 88

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-20: IPC14: INTERRUPT PRIORITY CONTROL REGISTER 14

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-1

R/W-0

bit 8

QEIIP<2:0>

bit 15

U-0

—

R/W-1

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

PWM1IP<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-12

bit 10-8

Unimplemented: Read as ‘0’

QEIIP<2:0>: QEI Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 7

Unimplemented: Read as ‘0’

bit 6-4

PWM1IP<2:0>: PWM1 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3-0

Unimplemented: Read as ‘0’

Preliminary

DS70283B-page 89

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-21: IPC15: INTERRUPT PRIORITY CONTROL REGISTER 15

U-0

—

R/W-1

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

FLTA1IP<2:0>

bit 15

bit 8

bit 0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

Unimplemented: Read as ‘0’

bit 14-12

FLTA1IP<2:0>: PWM1 Fault A Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 11-0

Unimplemented: Read as ‘0’

REGISTER 6-22: IPC16: INTERRUPT PRIORITY CONTROL REGISTER 16

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

bit 0

U-0

—

R/W-1

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

U1EIP<2:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-7

bit 6-4

Unimplemented: Read as ‘0’

U1EIP<2:0>: UART1 Error Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3-0

Unimplemented: Read as ‘0’

DS70283B-page 90

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-23: IPC18: INTERRUPT PRIORITY CONTROL REGISTER 18

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

FLTA2IP<2:0>

bit 15

U-0

—

R/W-1

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

PWM2IP<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-11

bit 8-10

Unimplemented: Read as ‘0’

FLTA2IP<2:0>: PWM2 Fault A Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 6-4

PWM2IP<2:0>: PWM2 Interrupt Priority bits

111= Interrupt is priority 7 (highest priority interrupt)

•

001= Interrupt is priority 1

000= Interrupt source is disabled

bit 3-0

Unimplemented: Read as ‘0’

Preliminary

DS70283B-page 91

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 6-24: INTTREG: INTERRUPT CONTROL AND STATUS REGISTER

U-0

—

U-0

—

U-0

—

U-0

—

R-0

ILR<3:0>

bit 15

bit 8

bit 0

U-0

—

R-0

VECNUM<6:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-12

bit 11-8

Unimplemented: Read as ‘0’

ILR: New CPU Interrupt Priority Level bits

1111= CPU Interrupt Priority Level is 15

•

0001= CPU Interrupt Priority Level is 1

0000= CPU Interrupt Priority Level is 0

bit 7

Unimplemented: Read as ‘0’

bit 6-0

VECNUM: Vector Number of Pending Interrupt bits

0111111= Interrupt Vector pending is number 135

•

0000001= Interrupt Vector pending is number 9

0000000= Interrupt Vector pending is number 8

DS70283B-page 92

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

6.4.3

TRAP SERVICE ROUTINE

6.4

Interrupt Setup Procedures

A Trap Service Routine (TSR) is coded like an ISR,

except that the appropriate trap status flag in the

INTCON1 register must be cleared to avoid re-entry

into the TSR.

6.4.1

INITIALIZATION

To configure an interrupt source at initialization:

1. Set the NSTDIS bit (INTCON1<15>) if nested

interrupts are not desired.

6.4.4

INTERRUPT DISABLE

2. Select the user-assigned priority level for the

interrupt source by writing the control bits in the

appropriate IPCx register. The priority level will

depend on the specific application and type of

interrupt source. If multiple priority levels are not

desired, the IPCx register control bits for all

enabled interrupt sources can be programmed

to the same non-zero value.

All user interrupts can be disabled using this

procedure:

1. Push the current SR value onto the software

stack using the PUSHinstruction.

2. Force the CPU to priority level 7 by inclusive

ORing the value OEh with SRL.

To enable user interrupts, the POP instruction can be

Note: At a device Reset, the IPCx registers are

initialized such that all user interrupt

sources are assigned to priority level 4.

used to restore the previous SR value.

Note:

Only user interrupts with a priority level of

7 or lower can be disabled. Trap sources

(level 8-level 15) cannot be disabled.

3. Clear the interrupt flag status bit associated with

the peripheral in the associated IFSx register.

The DISIinstruction provides a convenient way to dis-

able interrupts of priority levels 1-6 for a fixed period of

time. Level 7 interrupt sources are not disabled by the

DISI instruction.

4. Enable the interrupt source by setting the inter-

rupt enable control bit associated with the

source in the appropriate IECx register.

6.4.2

INTERRUPT SERVICE ROUTINE

The method used to declare an ISR and initialize the

IVT with the correct vector address depends on the

programming language (C or assembler) and the lan-

guage development tool suite used to develop the

application.

In general, the user application must clear the interrupt

flag in the appropriate IFSx register for the source of

interrupt that the ISR handles. Otherwise, program will

re-enter the ISR immediately after exiting the routine. If

the ISR is coded in assembly language, it must be ter-

minated using a RETFIE instruction to unstack the

saved PC value, SRL value and old CPU priority level.

Preliminary

DS70283B-page 93

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 94

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

• An on-chip Phase-Locked Loop (PLL) to scale the

internal operating frequency to the required

system clock frequency

7.0

OSCILLATOR

CONFIGURATION

• An internal FRC oscillator that can also be used

with the PLL, thereby allowing full-speed opera-

tion without any external clock generation hard-

ware

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

• Clock switching between various clock sources

• Programmable clock postscaler for system power

savings

• A Fail-Safe Clock Monitor (FSCM) that detects

clock failure and takes fail-safe measures

• A Clock Control register (OSCCON)

The

dsPIC33FJ32MC202/204

and

• Nonvolatile Configuration bits for main oscillator

selection.

dsPIC33FJ16MC304 oscillator system provides:

• External and internal oscillator options as clock

sources

A simplified diagram of the oscillator system is shown

in Figure 7-1.

FIGURE 7-1:

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 OSCILLATOR SYSTEM DIAGRAM

dsPIC33F

Primary Oscillator

DOZE<2:0>

XT, HS, EC

OSCO

OSCI

S2

XTPLL, HSPLL,

S3

ECPLL, FRCPLL

FCY

PLL⁽¹⁾

S1/S3

S1

÷ 2

FOSC

FRC

Oscillator

FRCDIVN

S7

FRCDIV<2:0>

TUN<5:0>

FRCDIV16

FRC

S6

S0

÷ 16

LPRC

SOSC

LPRC

Oscillator

S5

Secondary Oscillator

SOSCO

SOSCI

S4

LPOSCEN

Clock Switch

Reset

Clock Fail

S7

NOSC<2:0> FNOSC<2:0>

WDT, PWRT,

FSCM

Timer 1

Note 1: See Figure 7-2 for PLL details.

Preliminary

DS70283B-page 95

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

select the oscillator source that is used at a Power-on

Reset. The FRC primary oscillator is the default

(unprogrammed) selection.

7.1

CPU Clocking System

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 devices provide seven system

clock options:

The Configuration bits allow users to choose among 12

different clock modes, shown in Table 7-1.

• Fast RC (FRC) Oscillator

The output of the oscillator (or the output of the PLL if

a PLL mode has been selected) FOSC is divided by 2 to

generate the device instruction clock (FCY). FCY

defines the operating speed of the device, and speeds

• FRC Oscillator with PLL

• Primary (XT, HS or EC) Oscillator

• Primary Oscillator with PLL

• Secondary (LP) Oscillator

• Low-Power RC (LPRC) Oscillator

• FRC Oscillator with postscaler

up to

40

MHz

are

supported by

the

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

architecture.

Instruction execution speed or device operating

frequency, FCY, is given by:

7.1.1

SYSTEM CLOCK SOURCES

The Fast RC (FRC) internal oscillator runs at a nominal

frequency of 7.37 MHz. User software can tune the

FRC frequency. User software can optionally specify a

factor (ranging from 1:2 to 1:256) by which the FRC

clock frequency is divided. This factor is selected using

the FRCDIV<2:0> (CLKDIV<10:8>) bits.

EQUATION 7-1:

DEVICE OPERATING

FREQUENCY

FCY = FOSC/2

7.1.3

PLL CONFIGURATION

The primary oscillator can use one of the following as

its clock source:

The primary oscillator and internal FRC oscillator can

optionally use an on-chip PLL to obtain higher speeds

of operation. The PLL provides significant flexibility in

selecting the device operating speed. A block diagram

of the PLL is shown in Figure 7-2.

• XT (Crystal): Crystals and ceramic resonators in

the range of 3 MHz to 10 MHz. The crystal is con-

nected to the OSC1 and OSC2 pins.

• HS (High-Speed Crystal): Crystals in the range of

10 MHz to 40 MHz. The crystal is connected to

the OSC1 and OSC2 pins.

The output of the primary oscillator or FRC, denoted as

‘FIN’, is divided down by a prescale factor (N1) of 2, 3,

... or 33 before being provided to the PLL’s Voltage

Controlled Oscillator (VCO). The input to the VCO must

be selected in the range of 0.8 MHz to 8 MHz. The

prescale factor ‘N1’ is selected using the

PLLPRE<4:0> bits (CLKDIV<4:0>).

• EC (External Clock): External clock signal in the

range of 0.8 MHz to 64 MHz. The external clock

signal is directly applied to the OSC1 pin.

The secondary (LP) oscillator is designed for low power

and uses a 32.768 kHz crystal or ceramic resonator.

The LP oscillator uses the SOSCI and SOSCO pins.

The PLL Feedback Divisor, selected using the

PLLDIV<8:0> bits (PLLFBD<8:0>), provides a factor ‘M,’

by which the input to the VCO is multiplied. This factor

must be selected such that the resulting VCO output

frequency is in the range of 100 MHz to 200 MHz.

The LPRC (Low-Power RC) internal oscIllator runs at a

nominal frequency of 32.768 kHz. It is also used as a

reference clock by the Watchdog Timer (WDT) and

Fail-Safe Clock Monitor (FSCM).

The VCO output is further divided by a postscale factor

‘N2.’ This factor is selected using the PLLPOST<1:0>

bits (CLKDIV<7:6>). ‘N2’ can be either 2, 4 or 8, and

must be selected such that the PLL output frequency

(FOSC) is in the range of 12.5 MHz to 80 MHz, which

generates device operating speeds of 6.25-40 MIPS.

The clock signals generated by the FRC and primary

oscillators can be optionally applied to an on-chip

Phase Locked Loop (PLL) to provide a wide range of

output frequencies for device operation. PLL

configuration is described in Section 7.1.3 “PLL

Configuration”.

For a primary oscillator or FRC oscillator, output ‘FIN’,

the PLL output ‘FOSC’ is given by:

7.1.2

SYSTEM CLOCK SELECTION

The oscillator source used at a device Power-on

Reset event is selected using Configuration bit set-

tings. The oscillator Configuration bit settings are

located in the Configuration registers in the program

memory. (Refer to Section 20.1 “Configuration

Bits” for further details.) The Initial Oscillator Selec-

tion Configuration bits, FNOSC<2:0> (FOSC-

SEL<2:0>), and the Primary Oscillator Mode Select

Configuration bits, POSCMD<1:0> (FOSC<1:0>),

EQUATION 7-2:

FOSC CALCULATION

M

FOSC = FIN*

(_N1*N2)

DS70283B-page 96

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

For example, suppose a 10 MHz crystal is being used

with the selected oscillator mode of XT with PLL.

EQUATION 7-3:

XT WITH PLL MODE

EXAMPLE

• If PLLPRE<4:0> = 0, then N1 = 2. This yields a

VCO input of 10/2 = 5 MHz, which is within the

acceptable range of 0.8-8 MHz.

FOSC

1

2

10000000 * 32

FCY =

=

= 40 MIPS

(

)

2

2 * 2

• If PLLDIV<8:0> = 0x1E, then

M = 32. This yields a VCO output of 5 x 32 = 160

MHz, which is within the 100-200 MHz ranged

needed.

• If PLLPOST<1:0> = 0, then N2 = 2. This provides

a Fosc of 160/2 = 80 MHz. The resultant device

operating speed is 80/2 = 40 MIPS.

FIGURE 7-2:

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 PLL BLOCK DIAGRAM

0.8-8.0 MHz

Here

100-200 MHz

Here

12.5-80 MHz

Here

Source (Crystal, External Clock

or Internal RC)

FOSC

PLLPRE

VCO

PLLPOST

X

PLLDIV

Divide by

2-33

Divide by

2, 4, 8

Divide by

2-513

TABLE 7-1:

CONFIGURATION BIT VALUES FOR CLOCK SELECTION

Oscillator Mode

Oscillator Source

POSCMD<1:0>

FNOSC<2:0>

Note

1, 2

Fast RC Oscillator with Divide-by-N

(FRCDIVN)

Internal

xx

111

Internal

xx

110

1

Fast RC Oscillator with Divide-by-16

(FRCDIV16)

Low-Power RC Oscillator (LPRC)

Internal

Secondary

Primary

xx

10

101

100

011

1

Secondary (Timer1) Oscillator (SOSC)

Primary Oscillator (HS) with PLL

(HSPLL)

Primary Oscillator (XT) with PLL

(XTPLL)

Primary

01

00

011

Primary Oscillator (EC) with PLL

(ECPLL)

1

Primary Oscillator (HS)

Primary

Internal

10

01

00

xx

010

001

000

Primary Oscillator (XT)

Primary Oscillator (EC)

1

Fast RC Oscillator with PLL (FRCPLL)

Fast RC Oscillator (FRC)

Note 1: OSC2 pin function is determined by the OSCIOFNC Configuration bit.

2: This is the default oscillator mode for an unprogrammed (erased) device.

Preliminary

DS70283B-page 97

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 7-1:

OSCCON: OSCILLATOR CONTROL REGISTER

U-0

—

R-0

U-0

—

R/W-y

bit 8

COSC<2:0>

NOSC<2:0>

bit 15

R/W-0

CLKLOCK

bit 7

R/W-0

R-0

U-0

—

R/C-0

CF

U-0

—

R/W-0

IOLOCK

LOCK

LPOSCEN

OSWEN

bit 0

Legend:

y = Value set from Configuration bits on POR

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

Unimplemented: Read as ‘0’

bit 14-12

COSC<2:0>: Current Oscillator Selection bits (read-only)

000= Fast RC oscillator (FRC)

001= Fast RC oscillator (FRC) with PLL

010= Primary oscillator (XT, HS, EC)

011= Primary oscillator (XT, HS, EC) with PLL

100= Secondary oscillator (SOSC)

101= Low-Power RC oscillator (LPRC)

110= Fast RC oscillator (FRC) with Divide-by-16

111= Fast RC oscillator (FRC) with Divide-by-n

bit 11

Unimplemented: Read as ‘0’

bit 10-8

NOSC<2:0>: New Oscillator Selection bits

000= Fast RC oscillator (FRC)

001= Fast RC oscillator (FRC) with PLL

010= Primary oscillator (XT, HS, EC)

011= Primary oscillator (XT, HS, EC) with PLL

100= Secondary oscillator (SOSC)

101= Low-Power RC oscillator (LPRC)

110= Fast RC oscillator (FRC) with Divide-by-16

111= Fast RC oscillator (FRC) with Divide-by-n

bit 7

CLKLOCK: Clock Lock Enable bit

If clock switching is enabled and FSCM is disabled, (FOSC<FCKSM> = 0b01)

1= Clock switching is disabled, system clock source is locked

0= Clock switching is enabled, system clock source can be modified by clock switching

bit 6

bit 5

IOLOCK: Peripheral Pin Select Lock bit

1= Peripherial pin select is locked, write to peripheral pin select registers not allowed

0= Peripherial pin select is not locked, write to peripheral pin select registers allowed

LOCK: PLL Lock Status bit (read-only)

1= Indicates that PLL is in lock, or PLL start-up timer is satisfied

0= Indicates that PLL is out of lock, start-up timer is in progress or PLL is disabled

bit 4

bit 3

Unimplemented: Read as ‘0’

CF: Clock Fail Detect bit (read/clear by application)

1= FSCM has detected clock failure

0= FSCM has not detected clock failure

bit 2

Unimplemented: Read as ‘0’

DS70283B-page 98

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 7-1:

OSCCON: OSCILLATOR CONTROL REGISTER (CONTINUED)

bit 1

LPOSCEN: Secondary (LP) Oscillator Enable bit

1= Enable secondary oscillator

0= Disable secondary oscillator

bit 0

OSWEN: Oscillator Switch Enable bit

1= Request oscillator switch to selection specified by NOSC<2:0> bits

0= Oscillator switch is complete

Preliminary

DS70283B-page 99

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 7-2:

CLKDIV: CLOCK DIVISOR REGISTER

R/W-0

ROI

R/W-0

DOZEN⁽¹⁾

R/W-1

R/W-0

bit 8

R/W-0

DOZE<2:0>

FRCDIV<2:0>

bit 15

R/W-0

R/W-1

U-0

—

R/W-0

PLLPOST<1:0>

PLLPRE<4:0>

bit 7

bit 0

Legend:

y = Value set from Configuration bits on POR

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

ROI: Recover on Interrupt bit

1= Interrupts will clear the DOZEN bit and the processor clock/peripheral clock ratio is set to 1:1

0= Interrupts have no effect on the DOZEN bit

bit 14-12

DOZE<2:0>: Processor Clock Reduction Select bits

000= FCY/1

001= FCY/2

010= FCY/4

011= FCY/8 (default)

100= FCY/16

101= FCY/32

110= FCY/64

111= FCY/128

bit 11

DOZEN: DOZE Mode Enable bit⁽¹⁾

1= DOZE<2:0> field specifies the ratio between the peripheral clocks and the processor clocks

0= Processor clock/peripheral clock ratio forced to 1:1

bit 10-8

FRCDIV<2:0>: Internal Fast RC Oscillator Postscaler bits

000= FRC divide by 1 (default)

001= FRC divide by 2

010= FRC divide by 4

011= FRC divide by 8

100= FRC divide by 16

101= FRC divide by 32

110= FRC divide by 64

111= FRC divide by 256

bit 7-6

PLLPOST<1:0>: PLL VCO Output Divider Select bits (also denoted as ‘N2’, PLL postscaler)

00= Output/2

01= Output/4 (default)

10= Reserved

11= Output/8

bit 5

Unimplemented: Read as ‘0’

bit 4-0

PLLPRE<4:0>: PLL Phase Detector Input Divider bits (also denoted as ‘N1’, PLL prescaler)

00000= Input/2 (default)

00001= Input/3

•

11111= Input/33

Note 1: This bit is cleared when the ROI bit is set and an interrupt occurs.

DS70283B-page 100

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 7-3:

PLLFBD: PLL FEEDBACK DIVISOR REGISTER

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0⁽¹⁾

PLLDIV<8>

bit 8

bit 15

R/W-0

R/W-1

R/W-0

bit 0

PLLDIV<7:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-9

bit 8-0

Unimplemented: Read as ‘0’

PLLDIV<8:0>: PLL Feedback Divisor bits (also denoted as ‘M’, PLL multiplier)

000000000= 2

000000001= 3

000000010= 4

•

000110000= 50 (default)

•

111111111= 513

Preliminary

DS70283B-page 101

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 7-4:

OSCTUN: FRC OSCILLATOR TUNING REGISTER

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

U-0

—

U-0

—

R/W-0

TUN<5:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-6

bit 5-0

Unimplemented: Read as ‘0’

TUN<5:0>: FRC Oscillator Tuning bits

011111= Center frequency + 11.625%

011110= Center frequency + 11.25% (8.23 MHz)

•

000001= Center frequency + 0.375% (7.40 MHz)

000000= Center frequency (7.37 MHz nominal)

111111= Center frequency -0.375% (7.345 MHz)

•

100001= Center frequency -11.625% (6.52 MHz)

100000= Center frequency -12% (6.49 MHz)

DS70283B-page 102

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Once the basic sequence is completed, the system

clock hardware responds automatically as follows:

7.2

Clock Switching Operation

Applications are free to switch among any of the four

clock sources (Primary, LP, FRC and LPRC) under

software control at any time. To limit the possible side

effects of this flexibility, dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices have a safeguard lock

built into the switch process.

1. The clock switching hardware compares the

COSC status bits with the new value of the

NOSC control bits. If they are the same, the

clock switch is a redundant operation. In this

case, the OSWEN bit is cleared automatically

and the clock switch is aborted.

Note:

Primary Oscillator mode has three different

submodes (XT, HS and EC), which are

determined by the POSCMD<1:0> Config-

uration bits. While an application can

switch to and from Primary Oscillator

mode in software, it cannot switch among

the different primary submodes without

reprogramming the device.

2. If a valid clock switch has been initiated, the

LOCK

(OSCCON<5>)

and

the

CF

(OSCCON<3>) status bits are cleared.

3. The new oscillator is turned on by the hardware

if it is not currently running. If a crystal oscillator

must be turned on, the hardware waits until the

Oscillator Start-up Timer (OST) expires. If the

new source is using the PLL, the hardware waits

until a PLL lock is detected (LOCK = 1).

7.2.1

ENABLING CLOCK SWITCHING

4. The hardware waits for 10 clock cycles from the

new clock source and then performs the clock

switch.

To enable clock switching, the FCKSM1 Configuration

bit in the Configuration register must be programmed to

‘0’. (Refer to Section 20.1 “Configuration Bits” for

further details.) If the FCKSM1 Configuration bit is

unprogrammed (‘1’), the clock switching function and

Fail-Safe Clock Monitor function are disabled. This is

the default setting.

5. The hardware clears the OSWEN bit to indicate a

successful clock transition. In addition, the NOSC

bit values are transferred to the COSC status bits.

6. The old clock source is turned off at this time,

with the exception of LPRC (if WDT or FSCM

are enabled) or LP (if LPOSCEN remains set).

The NOSC control bits (OSCCON<10:8>) do not

control the clock selection when clock switching is

disabled. However, the COSC bits (OSCCON<14:12>)

reflect the clock source selected by the FNOSC

Configuration bits.

Note 1: The processor continues to execute code

throughout the clock switching sequence.

Timing-sensitive code should not be

executed during this time.

The OSWEN control bit (OSCCON<0>) has no effect

when clock switching is disabled. It is held at ‘0’ at all

times.

2: Direct clock switches between any primary

oscillator mode with PLL and FRCPLL

mode are not permitted. This applies to

clock switches in either direction. In these

instances, the application must switch to

FRC mode as a transition clock source

between the two PLL modes.

7.2.2

OSCILLATOR SWITCHING

SEQUENCE

Performing

sequence:

a

clock switch requires this basic

1. If

desired, read the COSC bits

7.3

Fail-Safe Clock Monitor (FSCM)

(OSCCON<14:12>) to determine the current

oscillator source.

The Fail-Safe Clock Monitor (FSCM) allows the device

to continue to operate even in the event of an oscillator

failure. The FSCM function is enabled by programming.

If the FSCM function is enabled, the LPRC internal

oscillator runs at all times (except during Sleep mode)

and is not subject to control by the Watchdog Timer.

2. Perform the unlock sequence to allow a write to

the OSCCON register high byte.

3. Write the appropriate value to the NOSC control

bits (OSCCON<10:8>) for the new oscillator

source.

In the event of an oscillator failure, the FSCM

generates a clock failure trap event and switches the

system clock over to the FRC oscillator. Then the

application program can either attempt to restart the

oscillator or execute a controlled shutdown. The trap

can be treated as a warm Reset by simply loading the

Reset address into the oscillator fail trap vector.

4. Perform the unlock sequence to allow a write to

the OSCCON register low byte.

5. Set the OSWEN bit (OSCCON<0>) to initiate

the oscillator switch.

If the PLL multiplier is used to scale the system clock,

the internal FRC is also multiplied by the same factor

on clock failure. Essentially, the device switches to

FRC with PLL on a clock failure.

Preliminary

DS70283B-page 103

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 104

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

8.2

Instruction-Based Power-Saving

Modes

8.0

POWER-SAVING FEATURES

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices have two special power-saving modes that are

entered through the execution of a special PWRSAV

instruction. Sleep mode stops clock operation and halts

all code execution. Idle mode halts the CPU and code

execution, but allows peripheral modules to continue

operation. The assembler syntax of the PWRSAV

instruction is shown in Example 8-1.

Note: SLEEP_MODE and IDLE_MODE are

constants defined in the assembler

include file for the selected device.

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 devices provide the ability to

manage power consumption by selectively managing

clocking to the CPU and the peripherals. In general, a

lower clock frequency and a reduction in the number of

circuits being clocked constitutes lower consumed

Sleep and Idle modes can be exited as a result of an

enabled interrupt, WDT time-out or a device Reset. When

the device exits these modes, it is said to wake-up.

power.

dsPIC33FJ32MC202/204

and

8.2.1

SLEEP MODE

dsPIC33FJ16MC304 devices can manage power con-

sumption in four different ways:

The following occur in Sleep mode:

• The system clock source is shut down. If an

on-chip oscillator is used, it is turned off.

• Clock frequency

• Instruction-based Sleep and Idle modes

• Software-controlled Doze mode

• Selective peripheral control in software

• The device current consumption is reduced to a

minimum, provided that no I/O pin is sourcing

current.

Combinations of these methods can be used to selec-

tively tailor an application’s power consumption while

still maintaining critical application features, such as

timing-sensitive communications.

• The Fail-Safe Clock Monitor does not operate,

since the system clock source is disabled.

• The LPRC clock continues to run in Sleep mode if

the WDT is enabled.

• The WDT, if enabled, is automatically cleared

prior to entering Sleep mode.

8.1

Clock Frequency and Clock

Switching

• Some device features or peripherals may continue

to operate. This includes items such as the input

change notification on the I/O ports, or peripherals

that use an external clock input.

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices allow a wide range of clock frequencies to be

selected under application control. If the system clock

configuration is not locked, users can choose low-

power or high-precision oscillators by simply changing

the NOSC bits (OSCCON<10:8>). The process of

changing a system clock during operation, as well as

limitations to the process, are discussed in more detail

in Section 7.0 “Oscillator Configuration”.

• Any peripheral that requires the system clock

source for its operation is disabled.

The device will wake-up from Sleep mode on any of the

these events:

• Any interrupt source that is individually enabled

• Any form of device Reset

• A WDT time-out

On wake-up from Sleep mode, the processor restarts

with the same clock source that was active when Sleep

mode was entered.

EXAMPLE 8-1:

PWRSAVINSTRUCTION SYNTAX

PWRSAV #SLEEP_MODE

PWRSAV #IDLE_MODE

; Put the device into SLEEP mode

; Put the device into IDLE mode

Preliminary

DS70283B-page 105

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Doze mode is enabled by setting the DOZEN bit

(CLKDIV<11>). The ratio between peripheral and core

clock speed is determined by the DOZE<2:0> bits

(CLKDIV<14:12>). There are eight possible

configurations, from 1:1 to 1:128, with 1:1 being the

default setting.

8.2.2

IDLE MODE

The following occur in Idle mode:

• The CPU stops executing instructions.

• The WDT is automatically cleared.

• The system clock source remains active. By

default, all peripheral modules continue to operate

normally from the system clock source, but can

also be selectively disabled (see Section 8.4

“Peripheral Module Disable”).

Programs can use Doze mode to selectively reduce

power consumption in event-driven applications. This

allows clock-sensitive functions, such as synchronous

communications, to continue without interruption while

the CPU idles, waiting for something to invoke an inter-

rupt routine. An automatic return to full-speed CPU

operation on interrupts can be enabled by setting the

ROI bit (CLKDIV<15>). By default, interrupt events

have no effect on Doze mode operation.

• If the WDT or FSCM is enabled, the LPRC also

remains active.

The device will wake from Idle mode on any of these

events:

• Any interrupt that is individually enabled

• Any device Reset

For example, suppose the device is operating at

20 MIPS and the CAN module has been configured for

500 kbps based on this device operating speed. If the

device is placed in Doze mode with a clock frequency

ratio of 1:4, the CAN module continues to communicate

at the required bit rate of 500 kbps, but the CPU now

starts executing instructions at a frequency of 5 MIPS.

• A WDT time-out

On wake-up from Idle mode, the clock is reapplied to

the CPU and instruction execution begins immediately,

starting with the instruction following the PWRSAV

instruction, or the first instruction in the ISR.

8.2.3

INTERRUPTS COINCIDENT WITH

POWER SAVE INSTRUCTIONS

8.4

Peripheral Module Disable

The Peripheral Module Disable (PMD) registers

provide a method to disable a peripheral module by

stopping all clock sources supplied to that module.

When a peripheral is disabled using the appropriate

PMD control bit, the peripheral is in a minimum power

consumption state. The control and status registers

associated with the peripheral are also disabled, so

writes to those registers will have no effect and read

values will be invalid.

Any interrupt that coincides with the execution of a

PWRSAV instruction is held off until entry into Sleep or

Idle mode has completed. The device then wakes up

from Sleep or Idle mode.

8.3

Doze Mode

The preferred strategies for reducing power consump-

tion are changing clock speed and invoking one of the

power-saving modes. In some circumstances, this may

not be practical. For example, it may be necessary for

an application to maintain uninterrupted synchronous

communication, even while it is doing nothing else.

Reducing system clock speed can introduce communi-

cation errors, while using a power-saving mode can

stop communications completely.

A peripheral module is enabled only if both the associ-

ated bit in the PMD register is cleared and the peripheral

is supported by the specific dsPIC^®DSC variant. If the

peripheral is present in the device, it is enabled in the

PMD register by default.

Note:

If a PMD bit is set, the corresponding mod-

ule is disabled after a delay of one instruc-

tion cycle. Similarly, if a PMD bit is cleared,

the corresponding module is enabled after

a delay of one instruction cycle (assuming

the module control registers are already

configured to enable module operation).

Doze mode is a simple and effective alternative method

to reduce power consumption while the device is still

executing code. In this mode, the system clock contin-

ues to operate from the same source and at the same

speed. Peripheral modules continue to be clocked at

the same speed, while the CPU clock speed is

reduced. Synchronization between the two clock

domains is maintained, allowing the peripherals to

access the SFRs while the CPU executes code at a

slower rate.

DS70283B-page 106

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

When a peripheral is enabled and the peripheral is

actively driving an associated pin, the use of the pin as

9.0

I/O PORTS

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

a general purpose output pin is disabled. The I/O pin

can be read, but the output driver for the parallel port bit

is disabled. If a peripheral is enabled, but the peripheral

is not actively driving a pin, that pin can be driven by a

port.

All port pins have three registers directly associated

with their operation as digital I/O. The data direction

register (TRISx) determines whether the pin is an input

or an output. If the data direction bit is a ‘1’, then the pin

is an input. All port pins are defined as inputs after a

Reset. Reads from the latch (LATx) read the latch.

Writes to the latch write the latch. Reads from the port

(PORTx) read the port pins, while writes to the port pins

write the latch.

All of the device pins (except VDD, VSS, MCLR and

OSC1/CLKI) are shared among the peripherals and the

parallel I/O ports. All I/O input ports feature Schmitt

Trigger inputs for improved noise immunity.

Any bit and its associated data and control registers

that are not valid for a particular device will be

disabled. That means the corresponding LATx and

TRISx registers and the port pin will read as zeros.

9.1

Parallel I/O (PIO) Ports

Generally a parallel I/O port that shares a pin with a

peripheral is subservient to the peripheral. The

peripheral’s output buffer data and control signals are

provided to a pair of multiplexers. The multiplexers

select whether the peripheral or the associated port

has ownership of the output data and control signals of

the I/O pin. The logic also prevents “loop through,” in

which a port’s digital output can drive the input of a

peripheral that shares the same pin. Figure 9-1 shows

how ports are shared with other peripherals and the

associated I/O pin to which they are connected.

When a pin is shared with another peripheral or func-

tion that is defined as an input only, it is nevertheless

regarded as a dedicated port because there is no

other competing source of outputs.

FIGURE 9-1:

BLOCK DIAGRAM OF A TYPICAL SHARED PORT STRUCTURE

Peripheral Module

Output Multiplexers

Peripheral Input Data

Peripheral Module Enable

I/O

Peripheral Output Enable

Peripheral Output Data

1

0

Output Enable

Output Data

1

0

PIO Module

Read TRIS

Data Bus

WR TRIS

D

Q

I/O Pin

CK

TRIS Latch

D

Q

WR LAT +

WR Port

CK

Data Latch

Read LAT

Read Port

Input Data

Preliminary

DS70283B-page 107

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

9.1.1

OPEN-DRAIN CONFIGURATION

9.2.1

I/O PORT WRITE/READ TIMING

In addition to the PORT, LAT and TRIS registers for

data control, each port pin can also be individually con-

figured for either digital or open-drain output. This is

controlled by the Open-Drain Control register, ODCx,

associated with each port. Setting any of the bits con-

figures the corresponding pin to act as an open-drain

output.

One instruction cycle is required between a port

direction change or port write operation and a read

operation of the same port. Typically this instruction

would be an NOP. An example is shown in Example 9-1.

9.3

Input Change Notification

The input change notification function of the I/O ports

allows the dsPIC33FJ32MC202/204 and

The open-drain feature allows the generation of

outputs higher than VDD (e.g., 5V) on any desired digi-

tal-only pins by using external pull-up resistors. The

maximum open-drain voltage allowed is the same as

the maximum VIH specification.

dsPIC33FJ16MC304 devices to generate interrupt

requests to the processor in response to a change-of-

state on selected input pins. This feature can detect

input change-of-states even in Sleep mode, when the

clocks are disabled. Depending on the device pin

count, up to 31 external signals (CNx pin) can be

selected (enabled) for generating an interrupt request

on a change-of-state.

9.2

Configuring Analog Port Pins

The AD1PCFG and TRIS registers control the opera-

tion of the analog-to-digital (A/D) port pins. The port

pins that are to function as analog inputs must have

their corresponding TRIS bit set (input). If the TRIS bit

is cleared (output), the digital output level (VOH or VOL)

will be converted.

Four control registers are associated with the CN mod-

ule. The CNEN1 and CNEN2 registers contain the

interrupt enable control bits for each of the CN input

pins. Setting any of these bits enables a CN interrupt

for the corresponding pins.

When the PORT register is read, all pins configured as

analog input channels will read as cleared (a low level).

Each CN pin also has a weak pull-up connected to it.

The pull-ups act as a current source connected to the

pin, and eliminate the need for external resistors when

push-button or keypad devices are connected. The

pull-ups are enabled separately using the CNPU1 and

CNPU2 registers, which contain the control bits for

each of the CN pins. Setting any of the control bits

enables the weak pull-ups for the corresponding pins.

Pins configured as digital inputs will not convert an

analog input. Analog levels on any pin defined as a dig-

ital input (including the ANx pins) can cause the input

buffer to consume current that exceeds the device

specifications.

Note:

Pull-ups on change notification pins

should always be disabled when the port

pin is configured as a digital output.

EXAMPLE 9-1:

PORT WRITE/READ EXAMPLE

MOV

NOP

0xFF00, W0

W0, TRISBB

; Configure PORTB<15:8> as inputs

; and PORTB<7:0> as outputs

; Delay 1 cycle

btss PORTB, #13

; Next Instruction

DS70283B-page 108

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Remappable peripherals are not associated with a

default I/O pin. The peripheral must always be

9.4

Peripheral Pin Select

Peripheral pin select configuration enables peripheral

set selection and placement on a wide range of I/O

pins. By increasing the pinout options available on a

particular device, programmers can better tailor the

microcontroller to their entire application, rather than

trimming the application to fit the device.

assigned to a specific I/O pin before it can be used. In

contrast, non remappable peripherals are always avail-

able on a default pin, assuming that the peripheral is

active and not conflicting with another peripheral.

9.4.2.1

Peripheral Pin Select Function

Priority

The peripheral pin select configuration feature oper-

ates over a fixed subset of digital I/O pins. Program-

mers can independently map the input and/or output of

most digital peripherals to any one of these I/O pins.

Peripheral pin select is performed in software, and gen-

erally does not require the device to be reprogrammed.

Hardware safeguards are included that prevent acci-

dental or spurious changes to the peripheral mapping,

once it has been established.

When a remappable peripheral is active on a given I/O

pin, it takes priority over all other digital I/O and digital

communication peripherals associated with the pin.

Priority is given regardless of the type of peripheral that

is mapped. Remappable peripherals never take priority

over any analog functions associated with the pin.

9.4.3

CONTROLLING PERIPHERAL PIN

SELECT

9.4.1

AVAILABLE PINS

Peripheral pin select features are controlled through

two sets of special function registers: one to map

peripheral inputs, and one to map outputs. Because

they are separately controlled, a particular peripheral’s

input and output (if the peripheral has both) can be

placed on any selectable function pin without

constraint.

The peripheral pin select feature is used with a range

of up to 26 pins. The number of available pins depends

on the particular device and its pin count. Pins that

support the peripheral pin select feature include the

designation “RPn” in their full pin designation, where

"RP" designates a remappable peripheral and “n” is the

remappable pin number.

The association of a peripheral to a peripheral select-

able pin is handled in two different ways, depending on

whether an input or output is being mapped.

9.4.2

AVAILABLE PERIPHERALS

The peripherals managed by the peripheral pin select

feature are all digital-only peripherals. These include:

9.4.3.1

Input Mapping

• General serial communications (UART and SPI)

• General purpose timer clock inputs

The inputs of the peripheral pin select options are

mapped on the basis of the peripheral. A control regis-

ter associated with a peripheral dictates the pin it will be

mapped to. The RPINRx registers are used to config-

ure peripheral input mapping (see Register 9-1 through

Register 9-13). Each register contains sets of 5-bit

fields, with each set associated with one of the remap-

pable peripherals. Programming a given peripheral’s

bit field with an appropriate 5-bit value maps the RPn

pin with that value to that peripheral. For any given

device, the valid range of values for any bit field corre-

sponds to the maximum number of peripheral pin

selections supported by the device.

• Timer-related peripherals (input capture and

output compare)

• Interrupt-on-change inputs

In comparison, some digital-only peripheral modules

are never included in the peripheral pin select feature.

This is because the peripheral’s function requires spe-

cial I/O circuitry on a specific port and cannot be easily

connected to multiple pins. These modules include I²C.

A similar requirement excludes all modules with analog

inputs, such as the Analog-to-Digital Converter (ADC).

Figure 9-2 Illustrates remappable pin selection for

U1RX input.

Preliminary

DS70283B-page 109

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 9-2:

REMAPPABLE MUX INPUT FOR U1RX

U1RXR<4:0>

0

1

2

RP0

RP1

RP2

U1RX input

to peripheral

25

RP25

TABLE 9-1:

SELECTABLE INPUT SOURCES (MAPS INPUT TO FUNCTION)⁽¹⁾

Configuration

Bits

Input Name

Function Name

Register

External Interrupt 1

External Interrupt 2

Timer 2 External Clock

Timer 3 External Clock

Input Capture 1

INT1

INT2

T2CK

T3CK

IC1

RPINR0

RPINR1

INT1R<4:0>

INT2R<4:0>

T2CKR<4:0>

T3CKR<4:0>

IC1R<4:0>

RPINR3

RPINR7

Input Capture 2

IC2

RPINR7

IC2R<4:0>

Input Capture 7

IC7

RPINR10

RPINR11

RPINR12

RPINR13

RPINR14

RPINR15

RPINR18

RPINR20

RPINR21

IC7R<4:0>

Input Capture 8

IC8

IC8R<4:0>

Output Compare Fault A

PWM1 Fault

OCFA

FLTA1

FLTA2

QEA

QEB

INDX

U1RX

U1CTS

SDI1

SCK1

SS1

OCFAR<4:0>

FLTA1R<4:0>

FLTA2R<4:0>

QEAR<4:0>

QEBR<4:0>

INDXR<4:0>

U1RXR<4:0>

U1CTSR<4:0>

SDI1R<4:0>

SCK1R<4:0>

SS1R<4:0>

PWM2 Fault

QEI Phase A

QEI Phase B

QEI Index

UART1 Receive

UART1 Clear To Send

SPI1 Data Input

SPI1 Clock Input

SPI1 Slave Select Input

Note 1: Unless otherwise noted, all inputs use the Schmitt input buffers.

DS70283B-page 110

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

value of the bit field corresponds to one of the periph-

erals, and that peripheral’s output is mapped to the pin

(see Table 9-2 and Figure 9-3).

9.4.3.2

Output Mapping

In contrast to inputs, the outputs of the peripheral pin

select options are mapped on the basis of the pin. In

this case, a control register associated with a particular

pin dictates the peripheral output to be mapped. The

RPORx registers are used to control output mapping.

Like the RPINRx registers, each register contains sets

of 5-bit fields, with each set associated with one RPn

pin (see Register 9-14 through Register 9-26). The

The list of peripherals for output mapping also includes

a null value of 00000 because of the mapping tech-

nique. This permits any given pin to remain uncon-

nected from the output of any of the pin selectable

peripherals.

FIGURE 9-3:

MULTIPLEXING OF REMAPPABLE OUTPUT FOR RPn

RPnR<4:0>

default

0

3

4

U1TX Output enable

U1RTS Output enable

Output enable

OC2 Output enable

UPDN Output enable

19

26

default

0

3

4

U1TX Output

U1RTS Output

RPn

Output Data

OC2 Output

19

26

UPDN Output

TABLE 9-2:

OUTPUT SELECTION FOR REMAPPABLE PIN (RPn)

RPnR<4:0>

Function

Output Name

NULL

U1TX

00000

00011

00100

00111

01000

01001

10010

10011

11010

RPn tied to default port pin

RPn tied to UART1 Transmit

U1RTS

SDO1

RPn tied to UART1 Ready To Send

RPn tied to SPI1 Data Output

SCK1OUT

SS1OUT

OC1

RPn tied to SPI1 Clock Output

RPn tied to SPI1 Slave Select Output

RPn tied to Output Compare 1

RPn tied to Output Compare 2

RPn tied to QEI direction (UPDN) status

OC2

UPDN

Preliminary

DS70283B-page 111

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

9.4.3.3

Peripheral Mapping

9.4.4.2

Continuous State Monitoring

The control schema of peripheral select pins is not lim-

ited to a small range of fixed peripheral configurations.

There are no mutual or hardware-enforced lockouts

between any of the peripheral mapping SFRs. Literally

any combination of peripheral mappings across any or

all of the RPn pins is possible. This includes both

many-to-one and one-to-many mappings of peripheral

inputs and outputs to pins.

In addition to being protected from direct writes, the

contents of the RPINRx and RPORx registers are con-

stantly monitored in hardware by shadow registers. If

an unexpected change in any of the registers occurs

(such as cell disturbances caused by ESD or other

external events), a configuration mismatch Reset will

be triggered.

9.4.4.3

Configuration Bit Pin Select Lock

While such mappings may be technically possible from

a configuration point of view, they may not be

supportable electrically.

As an additional level of safety, the device can be

configured to prevent more than one write session to

the RPINRx and RPORx registers. The IOL1WAY

(FOSC<IOL1WAY>) configuration bit blocks the

IOLOCK bit from being cleared after it has been set

once. If IOLOCK remains set, the register unlock

procedure will not execute, and the peripheral pin

select control registers cannot be written to. The only

way to clear the bit and re-enable peripheral remapping

is to perform a device Reset.

9.4.4

CONTROLLING CONFIGURATION

CHANGES

Because peripheral remapping can be changed during

run time, some restrictions on peripheral remapping

are needed to prevent accidental configuration

changes. dsPIC33F devices include three features to

prevent alterations to the peripheral map:

In the default (unprogrammed) state, IOL1WAY is set,

restricting users to one write session. Programming

IOL1WAY allows user applications unlimited access

(with the proper use of the unlock sequence) to the

peripheral pin select registers.

• Control register lock sequence

• Continuous state monitoring

• Configuration bit pin select lock

9.4.4.1

Control Register Lock

9.4.5

CONSIDERATIONS FOR

PERIPHERAL PIN SELECTION

Under normal operation, writes to the RPINRx and

RPORx registers are not allowed. Attempted writes

appear to execute normally, but the contents of the reg-

isters remain unchanged. To change these registers,

they must be unlocked in hardware. The register lock is

controlled by the IOLOCK bit (OSCCON<6>). Setting

IOLOCK prevents writes to the control registers;

clearing IOLOCK allows writes.

The ability to control peripheral pin selection introduces

several considerations into application design, includ-

ing several common peripherals that are available only

as remappable peripherals.

9.4.5.1

Initialization and Locks

To set or clear IOLOCK, a specific command sequence

must be executed:

The main consideration is that the peripheral pin

selects are not available on default pins in the device’s

default (Reset) state. More specifically, since all

RPINRx and RPORx registers reset to 0000h, this

means all peripheral pin select inputs are tied to RP0,

while all peripheral pin select outputs are disconnected.

This means that before any other application code is

executed, the user application must initialize the device

with the proper peripheral configuration.

1. Write 0x46 to OSCCON<7:0>.

2. Write 0x57 to OSCCON<7:0>.

3. Clear (or set) IOLOCK as a single operation.

Note:

MPLAB^®C30 provides built-in C language

functions for unlocking the OSCCON

register:

Since the IOLOCK bit resets in the unlocked state, it is

not necessary to execute the unlock sequence after the

device has come out of Reset. For the sake of applica-

tion safety, however, it is always a good idea to set

IOLOCK and lock the configuration after writing to the

control registers.

__builtin_write_OSCCONL(value)

__builtin_write_OSCCONH(value)

See MPLAB Help for more information.

Unlike the similar sequence with the oscillator’s LOCK

bit, IOLOCK remains in one state until changed. This

allows all of the peripheral pin selects to be configured

with a single unlock sequence followed by an update to

all control registers, then locked with a second lock

sequence.

The unlock sequence must be executed as an assem-

bly-language routine, in the same manner as changes

to the oscillator configuration, because the unlock

sequence is timing-critical. If the bulk of the application

is written in C or another high-level language, the

unlock sequence should be performed by writing inline

assembler.

DS70283B-page 112

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

9.4.5.2

Choosing the Configuration

EXAMPLE 9-2:

CONFIGURING UART1

INPUT AND OUTPUT

FUNCTIONS

Choosing the configuration requires review of all

peripheral pin selects and their pin assignments,

especially those that will not be used in the application.

In all cases, unused pin selectable peripherals should

be disabled completely. Unused peripherals should

have their inputs assigned to an unused RPn pin

function. I/O pins with unused RPn functions should be

configured with the null peripheral output.

//*************************************

// Unlock Registers

//*************************************

asm volatile ( "mov #OSCCONL, w1 \n"

"mov #0x46, w2

"mov #0x57, w3

"mov.b w2, [w1]

"mov.b w3, [w1]

"bclr OSCCON, 6");

\n"

The assignment of a peripheral to a particular pin does

not automatically perform any other configuration of the

pin’s I/O circuitry. This means adding a pin selectable

output to a pin can inadvertently drive an existing

peripheral input when the output is driven. Program-

mers must be familiar with the behavior of other fixed

peripherals that share a remappable pin, and know

when to enable or disable them. To be safe, fixed digital

peripherals that share the same pin should be disabled

when not in use.

//***************************

// Configure Input Functions

// (See Table 9-1)

//***************************

// Assign U1Rx To Pin RP0

//***************************

RPINR18bits.U1RXR = 0;

9.4.5.3

Pin Operation

//***************************

// Assign U1CTS To Pin RP1

//***************************

RPINR18bits.U1CTSR = 1;

Configuring a remappable pin for a specific peripheral

does not automatically turn that feature on. The periph-

eral must be specifically configured for operation and

enabled, as if it were tied to a fixed pin. Where this hap-

pens in the application code (immediately following

device Reset and peripheral configuration, or inside the

main application routine) depends on the peripheral

and its use in the application.

//***************************

// Configure Output Functions

// (See Table 9-2)

//***************************

// Assign U1Tx To Pin RP2

//***************************

RPOR1bits.RP2R = 3;

9.4.5.4

Analog Functions

A final consideration is that peripheral pin select

functions neither override analog inputs nor reconfigure

pins with analog functions for digital I/O. If a pin is con-

figured as an analog input on device Reset, it must be

explicitly reconfigured as digital I/O when used with a

peripheral pin select.

//***************************

// Assign U1RTS To Pin RP3

//***************************

RPOR1bits.RP3R = 4;

//*************************************

// Lock Registers

//*************************************

asm volatile ( "mov #OSCCONL, w1 \n"

9.4.5.5

Configuration Example

Example 9-2 shows a configuration for bidirectional

communication with flow control using UART1. The

following input and output functions are used:

"mov #0x46, w2

"mov #0x57, w3

"mov.b w2, [w1]

"mov.b w3, [w1]

"bset OSCCON, 6");

\n"

• Input Functions: U1RX, U1CTS

• Output Functions: U1TX, U1RTS

Preliminary

DS70283B-page 113

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

9.5

Peripheral Pin Select Registers

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 family of devices implement 21

registers for remappable peripheral configuration:

• Input Remappable Peripheral Registers (13)

• Output Remappable Peripheral Registers (8)

Note:

Input and Output Register values can only

be changed if OSCCON[IOLOCK] = 0.

See Section 9.4.4.1 “Control Register

Lock” for a specific command sequence.

REGISTER 9-1:

RPINR0: PERIPHERAL PIN SELECT INPUT REGISTER 0

U-0

—

U-0

—

U-0

—

R/W-1

bit 8

INT1R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

INT1R<4:0>: Assign External Interrupt 1 (INTR1) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

bit 7-0

Unimplemented: Read as ‘0’

DS70283B-page 114

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-2:

RPINR1: PERIPHERAL PIN SELECT INPUT REGISTER 1

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

U-0

—

U-0

—

U-0

—

R/W-1

INT2R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-5

bit 4-0

Unimplemented: Read as ‘0’

INTR2R<4:0>: Assign External Interrupt 2 (INTR2) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

Preliminary

DS70283B-page 115

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-3:

RPINR3: PERIPHERAL PIN SELECT INPUT REGISTER 3

U-0

—

U-0

—

U-0

—

R/W-1

bit 8

R/W-1

T3CKR<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-1

T2CKR<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

T3CKR<4:0>: Assign Timer3 External Clock (T3CK) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

T2CKR<4:0>: Assign Timer2 External Clock (T2CK) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

DS70283B-page 116

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-4:

RPINR7: PERIPHERAL PIN SELECT INPUT REGISTER 7

U-0

—

U-0

—

U-0

—

R/W-1

bit 8

R/W-1

IC2R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-1

IC1R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

IC2R<4:0>: Assign Input Capture 2 (IC2) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

IC1R<4:0>: Assign Input Capture 1 (IC1) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

Preliminary

DS70283B-page 117

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-5:

RPINR10: PERIPHERAL PIN SELECT INPUT REGISTERS 10

U-0

—

U-0

—

U-0

—

R/W-1

bit 8

R/W-1

IC8R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-1

IC7R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

IC8R<4:0>: Assign Input Capture 8 (IC8) to the corresponding pin RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

IC7R<4:0>: Assign Input Capture 7 (IC7) to the corresponding pin RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

DS70283B-page 118

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-6:

RPINR11: PERIPHERAL PIN SELECT INPUT REGISTER 11

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

U-0

—

U-0

—

U-0

—

R/W-1

OCFAR<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-5

bit 4-0

Unimplemented: Read as ‘0’

OCFAR<4:0>: Assign Output Capture A (OCFA) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

REGISTER 9-7:

RPINR12: PERIPHERAL PIN SELECT INPUT REGISTER 12

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

U-0

—

U-0

—

U-0

—

R/W-1

bit 0

FLTA1R<4:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-5

bit 4-0

Unimplemented: Read as ‘0’

FLTA1R<4:0>: Assign PWM1 Fault (FLTA1) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

Preliminary

DS70283B-page 119

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-8:

RPINR13: PERIPHERAL PIN SELECT INPUT REGISTER 13

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

U-0

—

U-0

—

U-0

—

R/W-1

FLTA2R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-5

bit 4-0

Unimplemented: Read as ‘0’

FLTA2R<4:0>: Assign PWM2 Fault (FLTA2) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

DS70283B-page 120

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-9:

RPINR14: PERIPHERAL PIN SELECT OUTPUT REGISTERS 14

U-0

—

U-0

—

U-0

—

R/W-1

bit 8

R/W-1

QEA1R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-1

QEB1R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

QEA1R<4:0>: Assign B (QEB) to the corresponding pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

QEB1R<4:0>: Assign A(QEA) to the corresponding pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

Preliminary

DS70283B-page 121

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-10: RPINR15: PERIPHERAL PIN SELECT INPUT REGISTER 15

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

U-0

—

U-0

—

U-0

—

R/W-1

INDX1R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-5

bit 4-0

Unimplemented: Read as ‘0’

INDX1R<4:0>: Assign QEI INDEX (INDX) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

DS70283B-page 122

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-11: RPINR18: PERIPHERAL PIN SELECT INPUT REGISTER 18

U-0

—

U-0

—

U-0

—

R/W-1

bit 8

R/W-1

U1CTSR<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-1

U1RXR<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

U1CTSR<4:0>: Assign UART1 Clear to Send (U1CTS) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

U1RXR<4:0>: Assign UART1 Receive (U1RX) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

Preliminary

DS70283B-page 123

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-12: RPINR20: PERIPHERAL PIN SELECT INPUT REGISTER 20

U-0

—

U-0

—

U-0

—

R/W-1

bit 8

R/W-1

SCK1R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-1

SDI1R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

SCK1R<4:0>: Assign SPI1 Clock Input (SCK1IN) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

SDI1R<4:0>: Assign SPI1 Data Input (SDI1) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

DS70283B-page 124

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-13: RPINR21: PERIPHERAL PIN SELECT INPUT REGISTER 21

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

U-0

—

U-0

—

U-0

—

R/W-1

SS1R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-5

bit 4-0

Unimplemented: Read as ‘0’

SS1R<4:0>: Assign SPI1 Slave Select Input (SS1IN) to the corresponding RPn pin bits

11111= Input tied VSS

11001= Input tied to RP25

.

00001= Input tied to RP1

00000= Input tied to RP0

Preliminary

DS70283B-page 125

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-14: RPOR0: PERIPHERAL PIN SELECT OUTPUT REGISTERS 0

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

RP1R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

RP0R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP1R<4:0>: Peripheral Output Function is Assigned to RP1 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP0R<4:0>: Peripheral Output Function is Assigned to RP0 Output Pin bits (see Table 9-2 for

peripheral function numbers)

REGISTER 9-15: RPOR1: PERIPHERAL PIN SELECT OUTPUT REGISTERS 1

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

RP3R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

bit 0

RP2R<4:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP3R<4:0>: Peripheral Output Function is Assigned to RP3 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP2R<4:0>: Peripheral Output Function is Assigned to RP2 Output Pin bits (see Table 9-2 for

peripheral function numbers)

DS70283B-page 126

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-16: RPOR2: PERIPHERAL PIN SELECT OUTPUT REGISTERS 2

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

RP5R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

RP4R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP5R<4:0>: Peripheral Output Function is Assigned to RP5 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP4R<4:0>: Peripheral Output Function is Assigned to RP4 Output Pin bits (see Table 9-2 for

peripheral function numbers)

REGISTER 9-17: RPOR3: PERIPHERAL PIN SELECT OUTPUT REGISTERS 3

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

RP7R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

bit 0

RP6R<4:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP7R<4:0>: Peripheral Output Function is Assigned to RP7 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP6R<4:0>: Peripheral Output Function is Assigned to RP6 Output Pin bits (see Table 9-2 for

peripheral function numbers)

Preliminary

DS70283B-page 127

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-18: RPOR4: PERIPHERAL PIN SELECT OUTPUT REGISTERS 0

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

RP9R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

RP8R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP9R<4:0>: Peripheral Output Function is Assigned to RP9 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP8R<4:0>: Peripheral Output Function is Assigned to RP8 Output Pin bits (see Table 9-2 for

peripheral function numbers)

REGISTER 9-19: RPOR5: PERIPHERAL PIN SELECT OUTPUT REGISTERS 5

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

RP11R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

bit 0

RP10R<4:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP11R<4:0>: Peripheral Output Function is Assigned to RP11 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP10R<4:0>: Peripheral Output Function is Assigned to RP10 Output Pin bits (see Table 9-2 for

peripheral function numbers)

DS70283B-page 128

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-20: RPOR6: PERIPHERAL PIN SELECT OUTPUT REGISTERS 6

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

RP13R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

RP12R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP13R<4:0>: Peripheral Output Function is Assigned to RP13 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP12R<4:0>: Peripheral Output Function is Assigned to RP12 Output Pin bits (see Table 9-2 for

peripheral function numbers)

REGISTER 9-21: RPOR7: PERIPHERAL PIN SELECT OUTPUT REGISTERS 7

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

RP15R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

bit 0

RP14R<4:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP15R<4:0>: Peripheral Output Function is Assigned to RP15 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP14R<4:0>: Peripheral Output Function is Assigned to RP14 Output Pin bits (see Table 9-2 for

peripheral function numbers)

Preliminary

DS70283B-page 129

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-22: RPOR8: PERIPHERAL PIN SELECT OUTPUT REGISTERS 8

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

RP17R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

RP16R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP17R<4:0>: Peripheral Output Function is Assigned to RP17 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP16R<4:0>: Peripheral Output Function is Assigned to RP16 Output Pin bits (see Table 9-2 for

peripheral function numbers)

REGISTER 9-23: RPOR9: PERIPHERAL PIN SELECT OUTPUT REGISTERS 9

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

RP19R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

bit 0

RP18R<4:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP19R<4:0>: Peripheral Output Function is Assigned to RP19 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP18R<4:0>: Peripheral Output Function is Assigned to RP18 Output Pin bits (see Table 9-2 for

peripheral function numbers)

DS70283B-page 130

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-24: RPOR10: PERIPHERAL PIN SELECT OUTPUT REGISTERS 10

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

RP21R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

RP20R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP21R<4:0>: Peripheral Output Function is Assigned to RP21 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP20R<4:0>: Peripheral Output Function is Assigned to RP20 Output Pin bits (see Table 9-2 for

peripheral function numbers)

REGISTER 9-25: RPOR11: PERIPHERAL PIN SELECT OUTPUT REGISTERS 11

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

RP23R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

bit 0

RP22R<4:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP23R<4:0>: Peripheral Output Function is Assigned to RP23 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP22R<4:0>: Peripheral Output Function is Assigned to RP22 Output Pin bits (see Table 9-2 for

peripheral function numbers)

Preliminary

DS70283B-page 131

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 9-26: RPOR12: PERIPHERAL PIN SELECT OUTPUT REGISTERS 12

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

RP25R<4:0>

bit 15

U-0

—

U-0

—

U-0

—

R/W-0

RP24R<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12-8

Unimplemented: Read as ‘0’

RP25R<4:0>: Peripheral Output Function is Assigned to RP25 Output Pin bits (see Table 9-2 for

peripheral function numbers)

bit 7-5

bit 4-0

Unimplemented: Read as ‘0’

RP24R<4:0>: Peripheral Output Function is Assigned to RP24 Output Pin bits (see Table 9-2 for

peripheral function numbers)

DS70283B-page 132

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Figure 10-1 presents a block diagram of the 16-bit

timer module.

10.0 TIMER1

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

To configure Timer1 for operation:

1. Set the TON bit (= 1) in the T1CON register.

2. Select the timer prescaler ratio using the

TCKPS<1:0> bits in the T1CON register.

3. Set the Clock and Gating modes using the TCS

and TGATE bits in the T1CON register.

4. Set or clear the TSYNC bit in T1CON to select

synchronous or asynchronous operation.

5. Load the timer period value into the PR1

register.

The Timer1 module is a 16-bit timer, which can serve

as the time counter for the real-time clock, or operate

as a free-running interval timer/counter. Timer1 can

operate in three modes:

6. If interrupts are required, set the interrupt enable

bit, T1IE. Use the priority bits, T1IP<2:0>, to set

the interrupt priority.

• 16-bit Timer

• 16-bit Synchronous Counter

• 16-bit Asynchronous Counter

Timer1 also supports these features:

• Timer gate operation

• Selectable prescaler settings

• Timer operation during CPU Idle and Sleep

modes

• Interrupt on 16-bit Period register match or falling

edge of external gate signal

FIGURE 10-1:

16-BIT TIMER1 MODULE BLOCK DIAGRAM

TCKPS<1:0>

TON

2

SOSCO/

1x

01

00

T1CK

Prescaler

1, 8, 64, 256

Gate

Sync

SOSCEN

SOSCI

TCY

TGATE

TCS

TGATE

1

0

Q

D

Set T1IF

CK

0

Reset

Equal

TMR1

1

Sync

TSYNC

Comparator

PR1

Preliminary

DS70283B-page 133

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 10-1: T1CON: TIMER1 CONTROL REGISTER

R/W-0

TON

U-0

—

R/W-0

TSIDL

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

bit 0

U-0

—

R/W-0

U-0

—

R/W-0

TCS

U-0

—

TGATE

TCKPS<1:0>

TSYNC

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

TON: Timer1 On bit

1= Starts 16-bit Timer1

0= Stops 16-bit Timer1

bit 14

bit 13

Unimplemented: Read as ‘0’

TSIDL: Stop in Idle Mode bit

1= Discontinue module operation when device enters Idle mode

0= Continue module operation in Idle mode

bit 12-7

bit 6

Unimplemented: Read as ‘0’

TGATE: Timer1 Gated Time Accumulation Enable bit

When T1CS = 1:

This bit is ignored.

When T1CS = 0:

1= Gated time accumulation enabled

0= Gated time accumulation disabled

bit 5-4

TCKPS<1:0> Timer1 Input Clock Prescale Select bits

11 = 1:256

10 = 1:64

01 = 1:8

00 = 1:1

bit 3

bit 2

Unimplemented: Read as ‘0’

TSYNC: Timer1 External Clock Input Synchronization Select bit

When TCS = 1:

1= Synchronize external clock input

0= Do not synchronize external clock input

When TCS = 0:

This bit is ignored.

bit 1

bit 0

TCS: Timer1 Clock Source Select bit

1= External clock from pin T1CK (on the rising edge)

0= Internal clock (FCY)

Unimplemented: Read as ‘0’

DS70283B-page 134

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

11.1 32-bit Operation

11.0 TIMER2/3 FEATURE

To configure the Timer2/3 feature timers for 32-bit

operation:

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

1. Set the T32 control bit.

2. Select the prescaler ratio for Timer2 using the

TCKPS<1:0> bits.

3. Set the Clock and Gating modes using the

corresponding TCS and TGATE bits.

4. Load the timer period value. PR3 contains the

most significant word of the value, while PR2

contains the least significant word.

The Timer2/3 feature has three 2-bit timers that can

also be configured as two independent 16-bit timers

with selectable operating modes.

5. If interrupts are required, set the interrupt enable

bit, T3IE. Use the priority bits, T3IP<2:0>, to set

the interrupt priority. While Timer2 controls the

timer, the interrupt appears as a Timer3

interrupt.

As a 32-bit timer, the Timer2/3 feature permits

operation in three modes:

6. Set the corresponding TON bit.

• Two Independent 16-bit timers (e.g., Timer2 and

Timer3) with all 16-bit operating modes (except

Asynchronous Counter mode)

The timer value at any point is stored in the register

pair, TMR3:TMR2, which always contains the most sig-

nificant word of the count, while TMR2 contains the

least significant word.

• Single 32-bit timer (Timer2/3)

• Single 32-bit synchronous counter (Timer2/3)

The Timer2/3 feature also supports:

11.2 16-bit Operation

• Timer gate operation

To configure any of the timers for individual 16-bit

operation:

• Selectable prescaler settings

• Timer operation during Idle and Sleep modes

• Interrupt on a 32-bit period register match

1. Clear the T32 bit corresponding to that timer.

2. Select the timer prescaler ratio using the

TCKPS<1:0> bits.

• Time base for Input Capture and Output Compare

modules (Timer2 and Timer3 only)

3. Set the Clock and Gating modes using the TCS

and TGATE bits.

• ADC1 event trigger (Timer2/3 only)

Individually, all eight of the 16-bit timers can function as

synchronous timers or counters. They also offer the

features listed above, except for the event trigger. The

operating modes and enabled features are determined

by setting the appropriate bit(s) in the T2CON, T3CON

registers. T2CON registers are shown in generic form

in Register 11-1. T3CON registers are shown in

Register 11-2.

4. Load the timer period value into the PRx

register.

5. If interrupts are required, set the interrupt enable

bit, TxIE. Use the priority bits, TxIP<2:0>, to set

the interrupt priority.

6. Set the TON bit.

For 32-bit timer/counter operation, Timer2 is the least

significant word, and Timer3 is the most significant

word of the 32-bit timers.

Note:

For 32-bit operation, T3CON control bits

are ignored. Only T2CON control bits are

used for setup and control. Timer2 clock

and gate inputs are used for the 32-bit

timer modules, but an interrupt is

generated with the Timer3 interrupt flags.

Preliminary

DS70283B-page 135

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 11-1:

TIMER2/3 (32-BIT) BLOCK DIAGRAM⁽¹⁾

TCKPS<1:0>

2

TON

1x

01

00

T2CK

Gate

Sync

Prescaler

1, 8, 64, 256

TCY

TGATE

TCS

TGATE

1

Q

D

Set T3IF

CK

0

PR2

PR3

(2)

ADC Event Trigger

Equal

Reset

Comparator

MSb

LSb

TMR3

TMR2

Sync

16

Read TMR2

Write TMR2

16

TMR3HLD

16

Data Bus<15:0>

Note 1: The 32-bit timer control bit, T32, must be set for 32-bit timer/counter operation. All control bits are respective

to the T2CON register.

2: The ADC event trigger is available only on Timer2/3.

DS70283B-page 136

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 11-2:

TIMER2 (16-BIT) BLOCK DIAGRAM

TCKPS<1:0>

2

TON

T2CK

1x

01

00

Prescaler

1, 8, 64, 256

Gate

Sync

TGATE

TCS

TGATE

TCY

1

0

Q

D

Set T2IF

CK

Reset

Equal

TMR2

Sync

Comparator

PR2

Preliminary

DS70283B-page 137

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 11-1: T2CON CONTROL REGISTER

R/W-0

TON

U-0

—

R/W-0

TSIDL

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

bit 0

U-0

—

R/W-0

T32⁽¹⁾

U-0

—

R/W-0

TCS

U-0

—

TGATE

TCKPS<1:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

TON: Timer2 On bit

When T32 = 1:

1= Starts 32-bit Timer2/3

0= Stops 32-bit Timer2/3

When T32 = 0:

1= Starts 16-bit Timer2

0= Stops 16-bit Timer2

bit 14

bit 13

Unimplemented: Read as ‘0’

TSIDL: Stop in Idle Mode bit

1= Discontinue module operation when device enters Idle mode

0= Continue module operation in Idle mode

bit 12-7

bit 6

Unimplemented: Read as ‘0’

TGATE: Timer2 Gated Time Accumulation Enable bit

When TCS = 1:

This bit is ignored.

When TCS = 0:

1= Gated time accumulation enabled

0= Gated time accumulation disabled

bit 5-4

bit 3

TCKPS<1:0>: Timer2 Input Clock Prescale Select bits

11= 1:256

10= 1:64

01= 1:8

00= 1:1

T32: 32-bit Timer Mode Select bit⁽¹⁾

1= Timer2 and Timer3 form a single 32-bit timer

0= Timer2 and Timer3 act as two 16-bit timers

bit 2

bit 1

Unimplemented: Read as ‘0’

TCS: Timer2 Clock Source Select bit

1= External clock from pin T2CK (on the rising edge)

0= Internal clock (FCY)

bit 0

Unimplemented: Read as ‘0’

Note 1: In 32-bit mode, T3CON control bits do not affect 32-bit timer operation.

DS70283B-page 138

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 11-2: T3CON CONTROL REGISTER

R/W-0

TON⁽¹⁾

U-0

—

R/W-0

TSIDL⁽¹⁾

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

bit 0

U-0

—

R/W-0

TGATE⁽¹⁾

R/W-0

TCKPS<1:0>⁽¹⁾

R/W-0

U-0

—

U-0

—

R/W-0

TCS⁽¹⁾

U-0

—

bit 7

Legend:

R = Readable bit

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

-n = Value at POR

bit 15

TON: Timer3 On bit⁽¹⁾

1= Starts 16-bit Timer3

0= Stops 16-bit Timer3

bit 14

bit 13

Unimplemented: Read as ‘0’

TSIDL: Stop in Idle Mode bit⁽¹⁾

1= Discontinue module operation when device enters Idle mode

0= Continue module operation in Idle mode

bit 12-7

bit 6

Unimplemented: Read as ‘0’

TGATE: Timer3 Gated Time Accumulation Enable bit⁽¹⁾

When TCS = 1:

This bit is ignored.

When TCS = 0:

1= Gated time accumulation enabled

0= Gated time accumulation disabled

bit 5-4

TCKPS<1:0>: Timer3 Input Clock Prescale Select bits⁽¹⁾

11= 1:256

10= 1:64

01= 1:8

00= 1:1

bit 3-2

bit 1

Unimplemented: Read as ‘0’

TCS: Timer3 Clock Source Select bit⁽¹⁾

1= External clock from pin T3CK (on the rising edge)

0= Internal clock (FCY)

bit 0

Unimplemented: Read as ‘0’

Note 1: When 32-bit operation is enabled (T2CON<3> = 1), these bits have no effect on Timer3 operation; all timer

functions are set through T2CON.

Preliminary

DS70283B-page 139

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 140

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

3. Prescaler Capture Event modes:

12.0 INPUT CAPTURE

- Capture timer value on every 4th rising edge

of input at ICx pin

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

- Capture timer value on every 16th rising

edge of input at ICx pin

Each input capture channel can select one of two

16-bit timers (Timer2 or Timer3) for the time base.

The selected timer can use either an internal or

external clock.

Other operational features include:

• Device wake-up from capture pin during CPU

Sleep and Idle modes

The input capture module is useful in applications

requiring frequency (period) and pulse measurement.

• Interrupt on input capture event

The

dsPIC33FJ32MC202/204

and

• 4-word FIFO buffer for capture values

dsPIC33FJ16MC304 devices support up to eight input

capture channels.

- Interrupt optionally generated after 1, 2, 3 or

4 buffer locations are filled

The input capture module captures the 16-bit value of

the selected Time Base register when an event occurs

at the ICx pin. The events that cause a capture event

are listed below in three categories:

• Use of input capture to provide additional sources

of external interrupts

1. Simple Capture Event modes:

- Capture timer value on every falling edge of

input at ICx pin

- Capture timer value on every rising edge of

input at ICx pin

2. Capture timer value on every edge (rising and

falling)

FIGURE 12-1:

INPUT CAPTURE BLOCK DIAGRAM

From 16-bit Timers

TMR2 TMR3

16

ICTMR

(ICxCON<7>)

1

0

Edge Detection Logic

and

Clock Synchronizer

FIFO

R/W

Logic

Prescaler

Counter

(1, 4, 16)

ICx Pin

ICM<2:0> (ICxCON<2:0>)

3

Mode Select

ICOV, ICBNE (ICxCON<4:3>)

ICxBUF

ICxI<1:0>

Interrupt

Logic

ICxCON

System Bus

Set Flag ICxIF

(in IFSn Register)

Note: An ‘x’ in a signal, register or bit name denotes the number of the capture channel.

Preliminary

DS70283B-page 141

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

12.1 Input Capture Registers

REGISTER 12-1: ICxCON: INPUT CAPTURE x CONTROL REGISTER

U-0

—

U-0

—

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

ICSIDL

bit 15

bit 8

R/W-0

R-0, HC

ICOV

R-0, HC

ICBNE

R/W-0

bit 0

ICTMR

ICI<1:0>

ICM<2:0>

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-14

bit 13

Unimplemented: Read as ‘0’

ICSIDL: Input Capture Module Stop in Idle Control bit

1= Input capture module will halt in CPU Idle mode

0= Input capture module will continue to operate in CPU Idle mode

bit 12-8

bit 7

Unimplemented: Read as ‘0’

ICTMR: Input Capture Timer Select bits

1= TMR2 contents are captured on capture event

0= TMR3 contents are captured on capture event

bit 6-5

ICI<1:0>: Select Number of Captures per Interrupt bits

11= Interrupt on every fourth capture event

10= Interrupt on every third capture event

01= Interrupt on every second capture event

00= Interrupt on every capture event

bit 4

ICOV: Input Capture Overflow Status Flag bit (read-only)

1= Input capture overflow occurred

0= No input capture overflow occurred

bit 3

ICBNE: Input Capture Buffer Empty Status bit (read-only)

1= Input capture buffer is not empty, at least one more capture value can be read

0= Input capture buffer is empty

bit 2-0

ICM<2:0>: Input Capture Mode Select bits

111=Input capture functions as interrupt pin only when device is in Sleep or Idle mode

(Rising edge detect only, all other control bits are not applicable.)

110=Unused (module disabled)

101=Capture mode, every 16th rising edge

100=Capture mode, every 4th rising edge

011=Capture mode, every rising edge

010=Capture mode, every falling edge

001=Capture mode, every edge (rising and falling)

(ICI<1:0> bits do not control interrupt generation for this mode.)

000=Input capture module turned off

DS70283B-page 142

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

and then issue a write to set the OCM bits to ‘100’.

13.0 OUTPUT COMPARE

Disabling and re-enabling the timer, and clearing

the TMRy register, are not required, but may be

advantageous for defining a pulse from a known

event time boundary.

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

The output compare module does not have to be dis-

abled after the falling edge of the output pulse. Another

pulse can be initiated by rewriting the value of the

OCxCON register.

13.2 Setup for Continuous Output

Pulse Generation

When the OCM control bits (OCxCON<2:0>) are set to

‘101’, the selected output compare channel initializes

the OCx pin to the low state and generates output

pulses on each and every compare match event.

13.1 Setup for Single Output Pulse

Generation

When the OCM control bits (OCxCON<2:0>) are set to

‘100’, the selected output compare channel initializes

the OCx pin to the low state and generates a single

output pulse.

To configure the module for generation of a continuous

stream of output pulses, the following steps are

required. These steps assume timer source is initially

turned off but this is not a requirement for the module

operation.

To generate a single output pulse, the following steps

are required. These steps assume timer source is

initially turned off but this is not a requirement for the

module operation.

1. Determine the instruction clock cycle time. Take

into account the frequency of the external clock to

the timer source (if one is used) and the timer

prescaler settings.

1. Determine the instruction clock cycle time. Take

into account the frequency of the external clock to

the timer source (if one is used) and the timer

prescaler settings.

2. Calculate time to the rising edge of the output

pulse relative to the TMRy start value (0000h).

2. Calculate time to the rising edge of the output

pulse relative to the TMRy start value (0000h).

3. Calculate the time to the falling edge of the pulse,

based on the desired pulse width and the time to

the rising edge of the pulse.

3. Calculate the time to the falling edge of the pulse

based on the desired pulse width and the time to

the rising edge of the pulse.

4. Write the values computed in step 2 into the Out-

put Compare register, OCxR, and value computed

in step 3 into the Output Compare Secondary

register, OCxRS.

4. Write the value computed in step 2 into the Output

Compare register, OCxR, and the value computed

in step 3 into the Output Compare Secondary

register, OCxRS.

5. Set Timer Period register, PRy, to a value equal to

or greater than value in OCxRS, the Output

Compare Secondary register.

5. Set Timer Period register, PRy, to a value equal to

or greater than value in OCxRS, the Output

Compare Secondary register.

6. Set the OCM bits to ‘101’ and the OCTSEL bit to

the desired timer source. The OCx pin state will

now be driven low.

6. Set the OCM bits to ‘100’ and the OCTSEL

(OCxCON<3>) bit to the desired timer source. The

OCx pin state will now be driven low.

7. Enable the compare time base by setting the TON

(TyCON<15>) bit to ‘1’. Upon the first match

between TMRy and OCxR, the OCx pin will be

driven high.

7. Set the TON (TyCON<15>) bit to ‘1’, which

enables the compare time base to count. Upon the

first match between TMRy and OCxR, the OCx pin

will be driven high.

When the compare time base, TMRy, matches the

Output Compare Secondary register, OCxRS, the

second and trailing edge (high-to-low) of the pulse

is driven onto the OCx pin.

When the incrementing timer, TMRy, matches the

Output Compare Secondary register, OCxRS, the

second and trailing edge (high-to-low) of the pulse

is driven onto the OCx pin. No additional pulses

are driven onto the OCx pin and it remains at low.

As a result of the second compare match event,

the OCxIF interrupt flag bit is set. This will result in

an interrupt if it is enabled by setting the OCxIE bit.

For further information on peripheral interrupts,

refer to Section 6.0 “Interrupt Controller”.

As a result of the second compare match event,

the OCxIF interrupt flag bit is set. When the com-

pare time base and the value in its respective

Timer Period register match, the TMRy register

resets to 0x0000 and resumes counting.

These events repeat and a continuous stream of

pulses is generated indefinitely. The OCxIF flag is

set on each OCxRS-TMRy compare match event.

8. To initiate another single pulse output, change the

Timer and Compare register settings, if needed,

Preliminary

DS70283B-page 143

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

EQUATION 13-1: CALCULATING THE PWM

PERIOD

13.3 Pulse-Width Modulation Mode

Use the following steps when configuring the output

compare module for PWM operation:

PWM Period = [(PRy) + 1] • TCY • (Timer Prescale Value)

where:

1. Set the PWM period by writing to the selected

Timer Period register (PRy).

PWM Frequency = 1/[PWM Period]

2. Set the PWM duty cycle by writing to the OCxRS

register.

Note: A PRy value of N will produce a PWM

period of N + 1 time base count cycles. For

example, a value of 7 written into the PRy

register will yield a period consisting of

eight time base cycles.

3. Write the OxCR register with the initial duty cycle.

4. Enable interrupts, if required, for the timer and

output compare modules. The output compare

interrupt is required for PWM Fault pin utilization.

5. Configure the output compare module for one of

two PWM operation modes by writing to the

Output Compare Mode bits, OCM<2:0>

(OCxCON<2:0>).

13.3.2

PWM DUTY CYCLE

Specify the PWM duty cycle by writing to the OCxRS reg-

ister. The OCxRS register can be written to at any time,

but the duty cycle value is not latched into OCxR until a

match between PRy and TMRy occurs (i.e., the period is

complete). This provides a double buffer for the PWM duty

cycle and is essential for glitchless PWM operation. In the

PWM mode, OCxR is a read-only register.

6. Set the TMRy prescale value and enable the

time base by setting TON = 1(TxCON<15>).

Note: The OCxR register should be initialized

before the output compare module is first

enabled. The OCxR register becomes a

read-only duty cycle register when the

module is operated in the PWM modes.

The value held in OCxR will become the

PWM duty cycle for the first PWM period.

The contents of the Output Compare

Secondary register, OCxRS, will not be

transferred into OCxR until a time base

period match occurs.

Some important boundary parameters of the PWM duty

cycle include:

• If the Output Compare register, OCxR, is loaded

with 0000h, the OCx pin will remain low (0% duty

cycle).

• If OCxR is greater than PRy (Timer Period register),

the pin will remain high (100% duty cycle).

• If OCxR is equal to PRy, the OCx pin will be low

for one time base count value and high for all

other count values.

13.3.1

PWM PERIOD

The PWM period is specified by writing to PRy, the

Timer Period register. The PWM period can be

calculated using Equation 13-1:

See Example 13-1 for PWM mode timing details.

Tables 13-1 through 13-3 show example PWM fre-

quencies and resolutions for a device operating at 4,

16, and 40 MIPS.

EQUATION 13-2: CALCULATION FOR MAXIMUM PWM RESOLUTION

FCY

log₁₀

(_FPWM)

bits

Maximum PWM Resolution (bits) =

log₁₀(2)

EXAMPLE 13-1:

PWM PERIOD AND DUTY CYCLE CALCULATIONS

1. Find the Timer Period register value for a desired PWM frequency that is 52.08 kHz, where FCY = 16 MHz and a Timer2

prescaler setting of 1:1.

TCY

= 62.5 ns

PWM Period = 1/PWM Frequency = 1/52.08 kHz = 19.2 μs

PWM Period = (PR2 + 1) • TCY • (Timer2 Prescale Value)

19.2 μs

PR2

= (PR2 + 1) • 62.5 ns • 1

= 306

2. Find the maximum resolution of the duty cycle that can be used with a 52.08 kHz frequency and a 32 MHz device clock rate:

PWM Resolution

=

log₁₀(FCY/FPWM)/log₁₀2) bits

(log₁₀(16 MHz/52.08 kHz)/log₁₀2) bits

8.3 bits

DS70283B-page 144

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 13-1: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 4 MIPS (FCY = 4 MHz)

PWM Frequency

7.6 Hz

61 Hz

122 Hz

977 Hz

3.9 kHz

31.3 kHz

125 kHz

Timer Prescaler Ratio

Period Register Value

Resolution (bits)

8

1

FFFFh

16

1

007Fh

7

1

001Fh

5

FFFFh

16

7FFFh

15

0FFFh

12

03FFh

10

TABLE 13-2: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 16 MIPS (FCY = 16 MHz)

PWM Frequency

30.5 Hz

244 Hz

488 Hz

3.9 kHz

15.6 kHz

125 kHz

500 kHz

Timer Prescaler Ratio

Period Register Value

Resolution (bits)

8

1

FFFFh

16

1

007Fh

7

1

001Fh

5

FFFFh

16

7FFFh

15

0FFFh

12

03FFh

10

TABLE 13-3: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MIPS (FCY = 40 MHz)

PWM Frequency

76 Hz

610 Hz

1.22 Hz

9.77 kHz

39 kHz

313 kHz 1.25 MHz

Timer Prescaler Ratio

Period Register Value

Resolution (bits)

8

1

FFFFh

16

1

007Fh

7

1

001Fh

5

FFFFh

16

7FFFh

15

0FFFh

12

03FFh

10

FIGURE 13-1:

OUTPUT COMPARE MODULE BLOCK DIAGRAM

Set Flag bit

(1)

OCxIF

(1)

OCxRS

S

R

Q

Output

Logic

(1)

OCxR

OCx

Output Enable

3

OCM2:OCM0

Mode Select

(2)

OCFA

Comparator

0

OCTSEL

1

0

1

16

TMR register inputs

from time bases

Period match signals

from time bases

(3)

Note 1: Where ‘x’ is shown, reference is made to the registers associated with the respective output compare

channels 1 through 8.

2: OCFA pin controls OC1-OC2 channels.

3: TMR2/TMR3 can be selected via OCTSEL (OCxCON<3>) bit.

Preliminary

DS70283B-page 145

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 13-1: OCxCON: OUTPUT COMPARE x CONTROL REGISTER

U-0

—

U-0

—

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

OCSIDL

bit 15

bit 8

U-0

—

U-0

—

U-0

—

R-0 HC

OCFLT

R/W-0

bit 0

OCTSEL

OCM<2:0>

bit 7

Legend:

HC = Cleared in Hardware

W = Writable bit

HS = Set in Hardware

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

R = Readable bit

-n = Value at POR

‘1’ = Bit is set

bit 15-14

bit 13

Unimplemented: Read as ‘0’

OCSIDL: Stop Output Compare in Idle Mode Control bit

1= Output Compare x will halt in CPU Idle mode

0= Output Compare x will continue to operate in CPU Idle mode

bit 12-5

bit 4

Unimplemented: Read as ‘0’

OCFLT: PWM Fault Condition Status bit

1= PWM Fault condition has occurred (cleared in hardware only)

0= No PWM Fault condition has occurred

(This bit is only used when OCM<2:0> = 111.)

bit 3

OCTSEL: Output Compare Timer Select bit

1= Timer3 is the clock source for Compare x

0= Timer2 is the clock source for Compare x

bit 2-0

OCM<2:0>: Output Compare Mode Select bits

111= PWM mode on OCx, Fault pin enabled

110= PWM mode on OCx, Fault pin disabled

101= Initialize OCx pin low, generate continuous output pulses on OCx pin

100= Initialize OCx pin low, generate single output pulse on OCx pin

011= Compare event toggles OCx pin

010= Initialize OCx pin high, compare event forces OCx pin low

001= Initialize OCx pin low, compare event forces OCx pin high

000= Output compare channel is disabled

DS70283B-page 146

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

14.1 PWM1: 6-Channel PWM Module

14.0 MOTOR CONTROL PWM

MODULE

This module simplifies the task of generating multiple

synchronized PWM outputs. The following power and

motion control applications are supported by the PWM

module:

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

• 3-Phase AC Induction Motor

• Switched Reluctance (SR) Motor

• Brushless DC (BLDC) Motor

• Uninterruptible Power Supply (UPS)

This module contains three duty cycle generators,

numbered 1 through 3. The module has six PWM out-

put pins, numbered PWM1H1/PWM1L1 through

PWM1H3/PWM1L3. The six I/O pins are grouped into

high/low numbered pairs, denoted by the suffix H or L,

respectively. For complementary loads, the low PWM

pins are always the complement of the corresponding

high I/O pin.

The

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 device supports up to two dedi-

cated Pulse Width Modulation (PWM) modules. The

PWM1 module is a 6-channel PWM generator, and the

PWM2 module is a 2-channel PWM generator.

The PWM module has the following features:

14.2 PWM2: 2-Channel PWM Module

• Up to 16-bit resolution

• On-the-fly PWM frequency changes

• Edge and Center-Aligned Output modes

• Single Pulse Generation mode

This module provides an additional pair of complimen-

tary PWM outputs that can be used for:

• Independent PFC correction in a motor system

• Induction cooking

• Interrupt support for asymmetrical updates in

Center-Aligned mode

This module contains a duty cycle generator that pro-

vides two PWM outputs, numbered PWM2H1/

PWM2L1.

• Output override control for Electrically

Commutative Motor (ECM) operation or BLDC

• Special Event comparator for scheduling other

peripheral events

• Fault pins to optionally drive each of the PWM

output pins to a defined state

Duty cycle updates configurable to be immediate or

synchronized to the PWM time base

Preliminary

DS70283B-page 147

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 14-1:

6-CHANNEL PWM MODULE BLOCK DIAGRAM (PWM1)

PWM1CON1

PWM Enable and Mode SFRs

PWM1CON2

P1DTCON1

P1DTCON2

P1FLTACON

P1OVDCON

Dead-Time Control SFRs

Fault Pin Control SFRs

PWM Manual

Control SFR

PWM Generator # 3

P1DC3 Buffer

P1DC3

Comparator

PWM1H3

PWM1L3

Channel 3 Dead-Time

Generator and

Override Logic

PWM Generator

#2

PWM1H2

PWM1L2

P1TMR

Comparator

P1TPER

Channel 2 Dead-Time

Generator and

Output

Driver

Block

Override Logic

PWM Generator

#1

PWM1H1

PWM1L1

Channel 1 Dead-Time

Generator and

Override Logic

P1TPER Buffer

P1TCON

FLTA1

Special Event

Postscaler

Comparator

P1SECMP

Special Event Trigger

SEVTDIR

PTDIR

PWM Time Base

Note:

Details of PWM Generator #1and #2 not shown for clarity.

DS70283B-page 148

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 14-2:

2-CHANNEL PWM MODULE BLOCK DIAGRAM (PWM2)

PWM2CON1

PWM Enable and Mode SFRs

PWM2CON2

P2DTCON1

P2DTCON2

P2FLTACON

P2OVDCON

Dead-Time Control SFRs

Fault Pin Control SFRs

PWM Manual

Control SFR

PWM Generator # 1

P2DC1Buffer

P2DC1

Comparator

PWM2H1

PWM2L1

Channel 1 Dead-Time

Generator and

Override Logic

P2TMR

Comparator

P2TPER

Output

Driver

Block

P2TPER Buffer

P2TCON

FLTA2

Special Event

Postscaler

Comparator

P2SECMP

Special Event Trigger

SEVTDIR

PTDIR

PWM Time Base

Preliminary

DS70283B-page 149

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

14.3.1

FREE-RUNNING MODE

14.3 PWM Time Base

In Free-Running mode, the PWM time base counts

upwards until the value in the PWM Time Base Period

register (PXTPER) is matched. The PXTMR register is

reset on the following input clock edge, and the time

base will continue to count upward as long as the PTEN

bit remains set.

The PWM time base is provided by a 15-bit timer with

a prescaler and postscaler. The time base is accessible

via the PXTMR SFR. PXTMR<15> is a read-only status

bit, PTDIR, that indicates the present count direction of

the PWM time base.

• If PTDIR is cleared, PXTMR is counting upward.

• If PTDIR is set, PxTMR is counting downward.

When the PWM time base is in the Free-Running mode

(PTMOD<1:0> = 00), an interrupt event is generated

each time a match with the PXTPER register occurs

and the PXTMR register is reset to zero. The postscaler

selection bits can be used in this mode of the timer to

reduce the frequency of interrupt events.

The PWM time base is configured using the PxTCON

SFR. The time base is enabled or disabled by setting

or clearing the PTEN bit in the PXTCON SFR. PXTMR

is not cleared when the PTEN bit is cleared in software.

The PXTPER SFR sets the counting period for

PXTMR. The user application must write a 15-bit value

to PXTPER<14:0>. When the value in PXTMR<14:0>

matches the value in PXTPER<14:0>, the time base

will either reset to ‘0’ or reverse the count direction on

the next occurring clock cycle. The action taken

depends on the operating mode of the time base.

14.3.2

SINGLE-SHOT MODE

In Single-Shot mode, the PWM time base begins

counting upward when the PTEN bit is set. When the

value in the PXTMR register matches the PXTPER reg-

ister, the PXTMR register will be reset on the following

input clock edge, and the PTEN bit will be cleared by

the hardware to halt the time base.

Note:

If the PWM Period register is set to

0x0000, the timer will stop counting and

the interrupt and Special Event Trigger will

not be generated, even if the special event

value is also 0x0000. The module will not

update the PWM Period register if it is

already at 0x0000; therefore, the user

application must disable the module in to

update the PWM Period register.

When the PWM time base is in Single-Shot mode

(PTMOD<1:0> = 01), an interrupt event is generated

when a match with the PXTPER register occurs. The

PxTMR register is reset to zero on the following input

clock edge and the PTEN bit is cleared. The postscaler

selection bits have no effect in this mode of the timer.

14.3.3

CONTINUOUS UP/DOWN COUNT

MODES

The PWM time base can be configured for four different

modes of operation:

In Continuous Up/Down Count modes, the PWM time

base counts upward until the value in the PXTPER reg-

ister is matched. The timer will begin counting down-

wards on the following input clock edge. The PTDIR bit

in the PXTMR SFR is read-only and indicates the

counting direction. The PTDIR bit is set when the timer

counts downward.

• Free-Running mode

• Single-Shot mode

• Continuous Up/Down Count mode

• Continuous Up/Down Count mode with interrupts

for double updates

These four modes are selected by the PTMOD<1:0>

bits in the PXTCON SFR. The Up/Down Count modes

support center-aligned PWM generation. The Single-

Shot mode allows the PWM module to support pulse

control of certain Electronically Commutative Motors

(ECMs).

In the Up/Down Count mode (PTMOD<1:0> = 10), an

interrupt event is generated each time the value of the

PXTMR register becomes zero and the PWM time base

begins to count upward. The postscaler selection bits

can be used in this mode of the timer to reduce the

frequency of interrupt events.

The interrupt signals generated by the PWM time base

depend on the mode selection bits (PTMOD<1:0>) and

the postscaler bits (PTOPS<3:0>) in the PXTCON SFR.

DS70283B-page 150

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

14.3.4

DOUBLE UPDATE MODE

14.4 PWM Period

In Double Update mode (PTMOD<1:0> = 11), an inter-

rupt event is generated each time the PXTMR register

is equal to zero, as well as each time a period match

occurs. The postscaler selection bits have no effect in

this mode of the timer.

PXTPER is a 15-bit register used to set the counting

period for the PWM time base. PXTPER is a double-

buffered register. The PXTPER buffer contents are

loaded into the PXTPER register at the following instants:

• Free-Running and Single-Shot modes: When the

PXTMR register is reset to zero after a match with

the PxTPER register.

Double Update mode provides two additional functions:

• The control loop bandwidth is doubled because

the PWM duty cycles can be updated twice per

period.

• Up/Down Count modes: When the PxTMR

register is zero.

• Asymmetrical center-aligned PWM waveforms can

be generated, which can be useful for minimizing

output waveform distortion in certain motor control

applications.

The value held in the PxTPER buffer is automatically

loaded into the PxTPER register when the PWM time

base is disabled (PTEN = 0).

The PWM period can be determined using

Equation 14-1:

Note:

Programming a value of 0x0001 in the

PWM Period register could generate a

continuous interrupt pulse and must be

avoided.

EQUATION 14-1: PWM PERIOD

14.3.5

PWM TIME BASE PRESCALER

TPWM =

TCY • (PXTPER + 1) • (PXTMR Prescale Value)

The input clock to PXTMR (FOSC/4) has prescaler

options of 1:1, 1:4, 1:16 or 1:64, selected by control bits

PTCKPS<1:0> in the PXTCON SFR. The prescaler

counter is cleared when any of the following occur:

If the PWM time base is configured for one of the Up/

Down Count modes, the PWM period will be twice the

value provided by Equation 14-1.

• A write to the PXTMR register

• A write to the PXTCON register

• Any device Reset

The maximum resolution (in bits) for a given device

oscillator and PWM frequency can be determined using

Equation 14-2:

The PXTMR register is not cleared when PXTCON is

written.

EQUATION 14-2: PWM RESOLUTION

14.3.6

PWM TIME BASE POSTSCALER

log (2 • TPWM/TCY)

Resolution =

log (2)

The match output of PXTMR can optionally be post-

scaled through a 4-bit postscaler (which gives a 1:1 to

1:16 scaling).

14.5 Edge-Aligned PWM

The postscaler counter is cleared when any of the

following occur:

Edge-aligned PWM signals are produced by the module

when the PWM time base is in Free-Running or Single-

Shot mode. For edge-aligned PWM outputs, the output

has a period specified by the value in PxTPER and a

duty cycle specified by the appropriate Duty Cycle reg-

ister (see Figure 14-3). The PWM output is driven active

at the beginning of the period (PxTMR = 0) and is driven

inactive when the value in the Duty Cycle register

matches PxTMR.

• A write to the PXTMR register

• A write to the PXTCON register

• Any device Reset

The PXTMR register is not cleared when PXTCON is writ-

ten.

If the value in a particular Duty Cycle register is zero,

the output on the corresponding PWM pin is inactive

for the entire PWM period. In addition, the output on

the PWM pin is active for the entire PWM period if the

value in the Duty Cycle register is greater than the

value held in the PxTPER register.

Preliminary

DS70283B-page 151

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 14-3:

EDGE-ALIGNED PWM

14.7 PWM Duty Cycle Comparison

Units

New Duty Cycle Latched

Three 16-bit Special Function Registers (PxDC1,

PxDC2, PxDC3) are used to specify duty cycle values

for the PWM module.

PxTPER

PXTMR

The value in each Duty Cycle register determines the

amount of time that the PWM output is active. The Duty

Cycle registers are 16 bits wide. The Least Significant

bit (LSb) of a Duty Cycle register determines whether

the PWM edge occurs in the beginning. Thus the PWM

resolution is effectively doubled.

Value

0

Duty Cycle

14.7.1

DUTY CYCLE REGISTER BUFFERS

The three PWM Duty Cycle registers are double-

buffered to allow glitchless updates of the PWM

outputs. For each duty cycle, there is a Duty Cycle

register that is accessible by the user application and a

second Duty Cycle register that holds the actual com-

pare value used in the present PWM period.

Period

14.6 Center-Aligned PWM

Center-aligned PWM signals are produced by the

module when the PWM time base is configured in an

Up/Down Count mode (see Figure 14-4).

For edge-aligned PWM output, a new duty cycle value

will be updated whenever a match with the PxTPER

register occurs and PxTMR is reset. The contents of

the duty cycle buffers are automatically loaded into the

Duty Cycle registers when the PWM time base is

disabled (PTEN = 0) and the UDIS bit is cleared in

PWMxCON2.

The PWM compare output is driven to the active state

when the value of the Duty Cycle register matches the

value of PxTMR and the PWM time base is counting

downward (PTDIR = 1). The PWM compare output is

driven to the inactive state when the PWM time base is

counting upward (PTDIR = 0) and the value in the

PxTMR register matches the duty cycle value.

When the PWM time base is in the Up/Down Count

mode, new duty cycle values are updated when the

value of the PxTMR register is zero, and the PWM time

base begins to count upward. The contents of the duty

cycle buffers are automatically loaded into the Duty

Cycle registers when the PWM time base is disabled

(PTEN = 0).

If the value in a particular Duty Cycle register is zero,

the output on the corresponding PWM pin is inactive for

the entire PWM period. In addition, the output on the

PWM pin is active for the entire PWM period if the value

in the Duty Cycle register is equal to the value held in

the PxTPER register.

When the PWM time base is in the Up/Down Count

mode with double updates, new duty cycle values are

updated when the value of the PxTMR register is zero,

and when the value of the PxTMR register matches the

value in the PxTPER register. The contents of the duty

cycle buffers are automatically loaded into the Duty

Cycle registers when the PWM time base is disabled

(PTEN = 0).

FIGURE 14-4:

CENTER-ALIGNED PWM

Period/2

PxTPER

PTMR

Value

Duty

Cycle

0

Period

DS70283B-page 152

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Complementary mode is selected for each PWM I/O

pin pair by clearing the appropriate PMODx bit in the

PWMxCON1 SFR. The PWM I/O pins are set to

Complementary mode by default upon a device Reset.

14.7.2

DUTY CYCLE IMMEDIATE UPDATES

When the Immediate Update Enable bit is set (IUE = 1),

any write to the Duty Cycle registers updates the new

duty cycle value immediately. This feature gives pro-

grammers the option to allow immediate updates of the

active PWM Duty Cycle registers instead of waiting for

the end of the current time base period. Duty cycle

update effects are as follows:

14.9 Dead-Time Generators

Dead-time generation can be provided when any of the

PWM I/O pin pairs are operating in Complementary Out-

put mode. The PWM outputs use push-pull drive circuits.

Power output devices cannot switch instantaneously, so

some amount of time must be provided between the

turn-off event of one PWM output in a complementary

pair and the turn-on event of the other transistor.

• If the PWM output is active at the time the new

duty cycle is written and the new duty cycle is less

than the current time base value, the PWM pulse

width will be shortened.

• If the PWM output is active at the time the new

duty cycle is written and the new duty cycle is

greater than the current time base value, the

PWM pulse width will be lengthened.

The PWM module allows two different dead times to be

programmed. These two dead times can be used in

one of two methods to increase user flexibility:

• If the PWM output is inactive at the time the new

duty cycle is written and the new duty cycle is

greater than the current time base value, the

PWM output will become active immediately and

will remain active for the new written duty cycle

value.

• The PWM output signals can be optimized for

different turn-off times in the high side and low

side transistors in a complementary pair of tran-

sistors. The first dead time is inserted between

the turn-off event of the lower transistor of the

complementary pair and the turn-on event of the

upper transistor. The second dead time is inserted

between the turn-off event of the upper transistor

and the turn-on event of the lower transistor.

System stability is improved in closed-loop servo appli-

cations by reducing the delay between system obser-

vation and the issuance of system corrective

commands when immediate updates are enabled

(IUE = 1).

• The two dead times can be assigned to individual

PWM I/O pin pairs. This operating mode allows

the PWM module to drive different transistor/load

combinations with each complementary PWM I/O

pin pair.

14.8 Complementary PWM Operation

In the Complementary mode of operation, each pair of

PWM outputs is obtained by a complementary PWM

signal. A dead time can be inserted during device

switching, when both outputs are inactive for a short

period (refer to Section 14.9 “Dead-Time Genera-

tors”).

14.9.1

DEAD-TIME GENERATORS

Each complementary output pair for the PWM module

has a 6-bit down counter that is used to produce the

dead-time insertion. As shown in Figure 14-5, each

dead-time unit has a rising and falling edge detector

connected to the duty cycle comparison output.

In Complementary mode, the duty cycle comparison

units are assigned to the PWM outputs as follows:

• PxDC1 register controls PWM1H/PWM1L outputs

• PxDC2 register controls PWM2H/PWM2L outputs

• PxDC3 register controls PWM3H/PWM3L outputs

FIGURE 14-5:

DEAD-TIME TIMING DIAGRAM

Duty Cycle Generator

PWMxH

PWMxL

Time Selected by DTSxA bit (A or B)

Time Selected by DTSxI bit (A or B)

Preliminary

DS70283B-page 153

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

14.9.2

DEAD-TIME ASSIGNMENT

14.10 Independent PWM Output

The PxDTCON2 SFR contains control bits that allow

the dead times to be assigned to each of the comple-

mentary outputs. Table 14-1 summarizes the function

of each dead-time selection control bit.

Independent PWM Output mode is required for driving

certain types of loads. A particular PWM output pair is

in the Independent Output mode when the correspond-

ing PMODx bit in the PWMxCON1 register is set. No

dead-time control is implemented between adjacent

PWM I/O pins when the module is operating in the

Independent PWM Output mode and both I/O pins are

allowed to be active simultaneously.

TABLE 14-1: DEAD-TIME SELECTION BITS

Bit

Function

DTS1A Selects PWMxL1/PWMxH1 active edge

dead time.

In the Independent PWM Output mode, each duty cycle

generator is connected to both of the PWM I/O pins in

an output pair. By using the associated Duty Cycle reg-

ister and the appropriate bits in the PxOVDCON regis-

ter, the programmer can select the following signal

output options for each PWM I/O pin operating in this

mode:

DTS1I Selects PWMxL1/PWMxH1 inactive edge

dead time.

DTS2A Selects PWMxL2/PWMxH2 active edge

dead time.

DTS2I Selects PWMxL2/PWMxH2 inactive edge

dead time.

• I/O pin outputs PWM signal

• I/O pin inactive

DTS3A Selects PWMxL3/PWMxH3 active edge

dead time.

• I/O pin active

DTS3I Selects PWMxL3/PWMxH3 inactive edge

dead time.

14.11 Single Pulse PWM Operation

The PWM module produces single pulse outputs when

the PxTCON control bits PTMOD<1:0> = 10. Only

edge-aligned outputs can be produced in the Single

Pulse mode. In Single Pulse mode, the PWM I/O pin(s)

are driven to the active state when the PTEN bit is set.

When a match with a Duty Cycle register occurs, the

PWM I/O pin is driven to the inactive state. When a

match with the PxTPER register occurs, the PxTMR

register is cleared, all active PWM I/O pins are driven

to the inactive state, the PTEN bit is cleared and an

interrupt is generated.

14.9.3

DEAD-TIME RANGES

The amount of dead time provided by each dead-time

unit is selected by specifying the input clock prescaler

value and a 6-bit unsigned value. The amount of dead

time provided by each unit can be set independently.

Four input clock prescaler selections have been pro-

vided to allow a suitable range of dead times, based on

the device operating frequency. The clock prescaler

option can be selected independently for each of the

two dead-time values. The dead-time clock prescaler

values are selected using the DTAPS<1:0> and

DTBPS<1:0> control bits in the PxDTCON1 SFR. One

of four clock prescaler options (TCY, 2 TCY, 4 TCY or 8

TCY) can be selected for each of the dead-time values.

14.12 PWM Output Override

The PWM output override bits allow the user applica-

tion to manually drive the PWM I/O pins to specified

logic states, independent of the duty cycle comparison

units.

After the prescaler values are selected, the dead time

for each unit is adjusted by loading two 6-bit unsigned

values into the PxDTCON1 SFR.

All control bits associated with the PWM output over-

ride function are contained in the PxOVDCON register.

The upper half of the PxOVDCON register contains

eight bits, POVDxH<4:1> and POVDxL<4:1>, that

determine which PWM I/O pins will be overridden. The

lower half of the PxOVDCON register contains eight

bits, POUTxH<4:1> and POUTxL<4:1>, that determine

the state of the PWM I/O pins when a particular output

is overridden via the POVD bits.

The dead-time unit prescalers are cleared on the

following events:

• On a load of the down timer due to a duty cycle

comparison edge event.

• On a write to the PxDTCON1 or PxDTCON2

registers.

• On any device Reset.

Note:

The user application should not modify the

PxDTCON1 or PxDTCON2 values while

the PWM module is operating (PTEN = 1).

Unexpected results can occur.

14.12.1 COMPLEMENTARY OUTPUT MODE

When a PWMxL pin is driven active via the PxOVD-

CON register, the output signal is forced to be the com-

plement of the corresponding PWMxH pin in the pair.

Dead-time insertion is still performed when PWM

channels are overridden manually.

DS70283B-page 154

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

14.12.2 OVERRIDE SYNCHRONIZATION

14.14.1 FAULT PIN ENABLE BITS

If the OSYNC bit in the PWMxCON2 register is set, all

output overrides performed via the PxOVDCON regis-

ter are synchronized to the PWM time base.

Synchronous output overrides occur at the

following times:

The PxFLTACON SFR have four control bits that deter-

mine whether a particular pair of PWM I/O pins is to be

controlled by the Fault input pin. To enable a specific

PWM I/O pin pair for Fault overrides, the corresponding

bit should be set in the PxFLTACON register.

• Edge-Aligned mode – When PxTMR is zero

If all enable bits are cleared in the PxFLTACON regis-

ter, the corresponding Fault input pin has no effect on

the PWM module and the pin can be used as a general

purpose interrupt or I/O pin.

• Center-Aligned modes – When PxTMR is zero

and the value of PxTMR matches PxTPER

14.13 PWM Output and Polarity Control

Note:

The Fault pin logic can operate indepen-

dent of the PWM logic. If all the enable bits

in the PxFLTACON registers are cleared,

then the Fault pin(s) could be used as gen-

eral purpose interrupt pin(s). Each Fault

pin has an interrupt vector, interrupt flag bit

and interrupt priority bits associated with it.

Three device Configuration bits are associated with the

PWM module that provide PWM output pin control:

• HPOL Configuration bit

• LPOL Configuration bit

• PWMPIN Configuration bit

These three bits in the FPOR Configuration register

(see Section 20.0 “Special Features”) work in con-

junction with the eight PWM Enable bits (PENxH<4:1>,

PENxL<4:1>) located in the PWMxCON1 SFR. The

Configuration bits and PWM Enable bits ensure that

the PWM pins are in the correct states after a device

Reset occurs.

14.14.2 FAULT STATES

The PxFLTACON Special Function Registers have

eight bits each that determine the state of each PWM

I/O pin when it is overridden by a Fault input. When

these bits are cleared, the PWM I/O pin is driven to the

inactive state. If the bit is set, the PWM I/O pin is

driven to the active state. The active and inactive

states are referenced to the polarity defined for each

PWM I/O pin (HPOL and LPOL polarity control bits).

The PWMPIN configuration fuse allows the PWM mod-

ule outputs to be optionally enabled on a device Reset.

If PWMPIN = 0, the PWM outputs are driven to their

inactive states at Reset. If PWMPIN = 1(default), the

PWM outputs will be tri-stated. The HPOL bit specifies

the polarity for the PWMxH outputs. The LPOL bit

specifies the polarity for the PWMxL outputs.

A special case exists when a PWM module I/O pair is

in the Complementary mode and both pins are pro-

grammed to be active on a Fault condition. The

PWMxH pin always has priority in the Complementary

mode, so that both I/O pins cannot be driven active

simultaneously.

14.13.1 OUTPUT PIN CONTROL

The PENxH<4:1> and PENxL<4:1> control bits in the

PWMxCON1 SFR enable each high PWM output pin

and each low PWM output pin, respectively. If a partic-

ular PWM output pin is not enabled, it is treated as a

general purpose I/O pin.

14.14.3 FAULT PIN PRIORITY

If both Fault input pins have been assigned to control a

particular PWM I/O pin, the Fault state programmed for

the Fault A input pin takes priority over the Fault B input

pin.

14.14 PWM Fault Pins

There is one Fault pin (FLTAx) associated with the

PWM module. When asserted, this pin can optionally

drive each of the PWM I/O pins to a defined state.

Preliminary

DS70283B-page 155

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

The PWM Special Event Trigger has an SFR named

PxSECMP, and five control bits to control its operation.

The PxTMR value for which a Special Event Trigger

should occur is loaded into the PxSECMP register.

14.14.4 FAULT INPUT MODES

Each of the Fault input pins has two modes of

operation:

• Latched Mode: When the Fault pin is driven low,

the PWM outputs go to the states defined in the

PxFLTACON registers. The PWM outputs remain

in this state until the Fault pin is driven high and

the corresponding interrupt flag has been cleared

in software. When both of these actions have

occurred, the PWM outputs return to normal oper-

ation at the beginning of the next PWM cycle or

half-cycle boundary. If the interrupt flag is cleared

before the Fault condition ends, the PWM module

waits until the Fault pin is no longer asserted to

restore the outputs.

When the PWM time base is in Up/Down Count mode,

an additional control bit is required to specify the count-

ing phase for the Special Event Trigger. The count

phase is selected using the SEVTDIR control bit in the

PxSECMP SFR:

• If the SEVTDIR bit is cleared, the Special Event

Trigger occurs on the upward counting cycle of

the PWM time base.

• If the SEVTDIR bit is set, the Special Event Trig-

ger occurs on the downward count cycle of the

PWM time base.

• Cycle-by-Cycle Mode: When the Fault input pin

is driven low, the PWM outputs remain in the

defined Fault states for as long as the Fault pin is

held low. After the Fault pin is driven high, the

PWM outputs return to normal operation at the

beginning of the following PWM cycle or

half-cycle boundary.

The SEVTDIR control bit has no effect unless the PWM

time base is configured for an Up/Down Count mode.

14.16.1 SPECIAL EVENT TRIGGER

POSTSCALER

The PWM Special Event Trigger has a postscaler that

allows a 1:1 to 1:16 postscale ratio. The postscaler is

configured by writing the SEVOPS<3:0> control bits in

the PWMxCON2 SFR.

The operating mode for each Fault input pin is selected

using the FLTAM control bits in the PxFLTACON

Special Function Registers.

The special event output postscaler is cleared on the

following events:

Each of the Fault pins can be controlled manually in

software.

• Any write to the PxSECMP register

• Any device Reset

14.15 PWM Update Lockout

For a complex PWM application, the user application

may need to write up to three Duty Cycle registers and

the PWM Time Base Period register, PxTPER, at a

given time. In some applications, it is important that all

buffer registers be written before the new duty cycle

and period values are loaded for use by the module.

14.17 PWM Operation During CPU Sleep

Mode

The Fault A and Fault B input pins can wake the CPU

from Sleep mode. The PWM module generates an

interrupt if either of the Fault pins is driven low while in

Sleep mode.

The PWM update lockout feature is enabled by setting

the UDIS control bit in the PWM1CON2 SFR. The

UDIS bit affects all Duty Cycle Buffer registers and the

PWM Time Base Period register, PxTPER. No duty

cycle changes or period value changes will have effect

while UDIS = 1.

14.18 PWM Operation During CPU Idle

Mode

The PxTCON SFR contains a PTSIDL control bit. This

bit determines if the PWM module will continue to

operate or stop when the device enters Idle mode. If

PTSIDL = 0, the module will continue to operate. If

PTSIDL = 1, the module will stop operation as long as

the CPU remains in Idle mode.

If the IUE bit is set, any change to the Duty Cycle

registers will be immediately updated regardless of the

UDIS bit state. The PWM Period register (PxTPER)

updates are not affected by the IUE control bit.

14.16 PWM Special Event Trigger

The PWM module has a Special Event Trigger that

allows ADC conversions to be synchronized to the

PWM time base. The ADC sampling and conversion

time can be programmed to occur at any point within

the PWM period. The Special Event Trigger allows the

programmer to minimize the delay between the time

when ADC conversion results are acquired and the

time when the duty cycle value is updated.

DS70283B-page 156

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-1: PxTCON: PWM TIME BASE CONTROL REGISTER

R/W-0

PTEN

U-0

—

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

PTSIDL

bit 15

bit 8

R/W-0

PTOPS<3:0>

PTCKPS<1:0>

PTMOD<1:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

PTEN: PWM Time Base Timer Enable bit

1= PWM time base is on

0= PWM time base is off

bit 14

bit 13

Unimplemented: Read as ‘0’

PTSIDL: PWM Time Base Stop in Idle Mode bit

1= PWM time base halts in CPU Idle mode

0= PWM time base runs in CPU Idle mode

bit 12-8

bit 7-4

Unimplemented: Read as ‘0’

PTOPS<3:0>: PWM Time Base Output Postscale Select bits

1111= 1:16 postscale

•

0001= 1:2 postscale

0000= 1:1 postscale

bit 3-2

bit 1-0

PTCKPS<1:0>: PWM Time Base Input Clock Prescale Select bits

11= PWM time base input clock period is 64 TCY (1:64 prescale)

10= PWM time base input clock period is 16 TCY (1:16 prescale)

01= PWM time base input clock period is 4 TCY (1:4 prescale)

00= PWM time base input clock period is TCY (1:1 prescale)

PTMOD<1:0>: PWM Time Base Mode Select bits

11= PWM time base operates in a Continuous Up/Down Count mode with interrupts for double

PWM updates

10= PWM time base operates in a Continuous Up/Down Count mode

01= PWM time base operates in Single Pulse mode

00= PWM time base operates in a Free-Running mode

Preliminary

DS70283B-page 157

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-2: PxTMR: PWM TIMER COUNT VALUE REGISTER

R-0

R/W-0

bit 8

R/W-0

PTDIR

PTMR<14:8>

bit 15

R/W-0

PTMR<7:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

PTDIR: PWM Time Base Count Direction Status bit (read-only)

1= PWM time base is counting down

0= PWM time base is counting up

bit 14-0

PTMR <14:0>: PWM Time Base Register Count Value bits

REGISTER 14-3: PxTPER: PWM TIME BASE PERIOD REGISTER

U-0

—

R/W-0

bit 8

PTPER<14:8>

bit 15

R/W-0

bit 7

R/W-0

bit 0

PTPER<7:0>

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

Unimplemented: Read as ‘0’

PTPER<14:0>: PWM Time Base Period Value bits

bit 14-0

DS70283B-page 158

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-4: PxSECMP: SPECIAL EVENT COMPARE REGISTER

R/W-0

SEVTDIR⁽¹⁾

bit 15

R/W-0

SEVTCMP<14:8>⁽²⁾

R/W-0

bit 8

R/W-0

bit 7

R/W-0

SEVTCMP<7:0>⁽²⁾

R/W-0

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

SEVTDIR: Special Event Trigger Time Base Direction bit⁽¹⁾

1= A Special Event Trigger will occur when the PWM time base is counting downward

0= A Special Event Trigger will occur when the PWM time base is counting upward

bit 14-0

SEVTCMP<14:0>: Special Event Compare Value bits⁽²⁾

Note 1: SEVTDIR is compared with PTDIR (PXTMR<15>) to generate the Special Event Trigger.

2: PxSECMP<14:0> is compared with PXTMR<14:0> to generate the Special Event Trigger.

Preliminary

DS70283B-page 159

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-5: PWMxCON1: PWM CONTROL REGISTER 1⁽²⁾

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

PMOD3

PMOD2

PMOD1

bit 15

bit 8

U-0

—

R/W-1

PEN3H⁽¹⁾

R/W-1

PEN2H⁽¹⁾

R/W-1

PEN1H⁽¹⁾

U-0

—

R/W-1

PEN3L⁽¹⁾

R/W-1

PEN2L⁽¹⁾

R/W-1

PEN1L⁽¹⁾

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

-n = Value at POR

bit 15-11

bit 10-8

Unimplemented: Read as ‘0’

PMOD4:PMOD1: PWM I/O Pair Mode bits

1= PWM I/O pin pair is in the Independent PWM Output mode

0= PWM I/O pin pair is in the Complementary Output mode

bit 7

Unimplemented: Read as ‘0’

bit 6-4

PEN3H:PEN1H: PWMxH I/O Enable bits⁽¹⁾

1= PWMxH pin is enabled for PWM output

0= PWMxH pin disabled, I/O pin becomes general purpose I/O

bit 3

Unimplemented: Read as ‘0’

bit 2-0

PEN3L:PEN1L: PWMxL I/O Enable bits⁽¹⁾

1= PWMxL pin is enabled for PWM output

0= PWMxL pin disabled, I/O pin becomes general purpose I/O

Note 1: Reset condition of the PENxH and PENxL bits depends on the value of the PWMPIN Configuration bit in

the FPOR Configuration register.

2: PWM2 supports only 1 PWM I/O pin pair.

DS70283B-page 160

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-6: PWMxCON2: PWM CONTROL REGISTER 2

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

bit 8

SEVOPS<3:0>

bit 15

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

IUE

R/W-0

UDIS

OSYNC

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-12

bit 11-8

Unimplemented: Read as ‘0’

SEVOPS<3:0>: PWM Special Event Trigger Output Postscale Select bits

1111= 1:16 postscale

•

0001= 1:2 postscale

0000= 1:1 postscale

bit 7-3

bit 2

Unimplemented: Read as ‘0’

IUE: Immediate Update Enable bit

1= Updates to the active PxDC registers are immediate

0= Updates to the active PxDC registers are synchronized to the PWM time base

bit 1

bit 0

OSYNC: Output Override Synchronization bit

1= Output overrides via the PxOVDCON register are synchronized to the PWM time base

0= Output overrides via the PxOVDCON register occur on next TCY boundary

UDIS: PWM Update Disable bit

1= Updates from Duty Cycle and Period Buffer registers are disabled

0= Updates from Duty Cycle and Period Buffer registers are enabled

Preliminary

DS70283B-page 161

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-7: PxDTCON1: DEAD-TIME CONTROL REGISTER 1

R/W-0

DTB<5:0>

R/W-0

bit 8

R/W-0

DTBPS<1:0>

bit 15

R/W-0

DTAPS<1:0>

R/W-0

R/W-0 R/W-0

DTA<5:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-14

DTBPS<1:0>: Dead-Time Unit B Prescale Select bits

11= Clock period for Dead-Time Unit B is 8 TCY

10= Clock period for Dead-Time Unit B is 4 TCY

01= Clock period for Dead-Time Unit B is 2 TCY

00= Clock period for Dead-Time Unit B is TCY

bit 13-8

bit 7-6

DTB<5:0>: Unsigned 6-bit Dead-Time Value for Dead-Time Unit B bits

DTAPS<1:0>: Dead-Time Unit A Prescale Select bits

11= Clock period for Dead-Time Unit A is 8 TCY

10= Clock period for Dead-Time Unit A is 4 TCY

01= Clock period for Dead-Time Unit A is 2 TCY

00= Clock period for Dead-Time Unit A is TCY

bit 5-0

DTA<5:0>: Unsigned 6-bit Dead-Time Value for Dead-Time Unit A bits

DS70283B-page 162

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-8: PxDTCON2: DEAD-TIME CONTROL REGISTER 2 ⁽¹⁾

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

bit 15

bit 8

U-0

—

U-0

—

R/W-0

DTS3I

R/W-0

DTS2I

R/W-0

DTS1I

DTS3A

DTS2A

DTS1A

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-6

bit 5

Unimplemented: Read as ‘0’

DTS3A: Dead-Time Select for PWM3 Signal Going Active bit

1= Dead time provided from Unit B

0= Dead time provided from Unit A

bit 4

bit 3

bit 2

bit 1

bit 0

DTS3I: Dead-Time Select for PWM3 Signal Going Inactive bit

1= Dead time provided from Unit B

0= Dead time provided from Unit A

DTS2A: Dead-Time Select for PWM2 Signal Going Active bit

1= Dead time provided from Unit B

0= Dead time provided from Unit A

DTS2I: Dead-Time Select for PWM2 Signal Going Inactive bit

1= Dead time provided from Unit B

0= Dead time provided from Unit A

DTS1A: Dead-Time Select for PWM1 Signal Going Active bit

1= Dead time provided from Unit B

0= Dead time provided from Unit A

DTS1I: Dead-Time Select for PWM1 Signal Going Inactive bit

1= Dead time provided from Unit B

0= Dead time provided from Unit A

Note 1: PWM2 supports only 1 PWM I/O pin pair.

Preliminary

DS70283B-page 163

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-9: PxFLTACON: FAULT A CONTROL REGISTER⁽¹⁾

U-0

—

U-0

—

R/W-0

FAOV3H

FAOV3L

FAOV2H

FAOV2L

FAOV1H

FAOV1L

bit 15

bit 8

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

FLTAM

FAEN3

FAEN2

FAEN1

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-14

bit 13-8

Unimplemented: Read as ‘0’

FAOVxH<3:1>:FAOVxL<3:1>: Fault Input A PWM Override Value bits

1= The PWM output pin is driven active on an external Fault input event

0= The PWM output pin is driven inactive on an external Fault input event

bit 7

FLTAM: Fault A Mode bit

1= The Fault A input pin functions in the Cycle-by-Cycle mode

0= The Fault A input pin latches all control pins to the programmed states in PxFLTACON<13:8>

bit 6-3

bit 2

Unimplemented: Read as ‘0’

FAEN3: Fault Input A Enable bit

1= PWMxH3/PWMxL3 pin pair is controlled by Fault Input A

0= PWMxH3/PWMxL3 pin pair is not controlled by Fault Input A

bit 1

bit 0

FAEN2: Fault Input A Enable bit

1= PWMxH2/PWMxL2 pin pair is controlled by Fault Input A

0= PWMxH2/PWMxL2 pin pair is not controlled by Fault Input A

FAEN1: Fault Input A Enable bit

1= PWMxH1/PWMxL1 pin pair is controlled by Fault Input A

0= PWMxH1/PWMxL1 pin pair is not controlled by Fault Input A

Note 1: PWM2 supports only 1 PWM I/O pin pair.

DS70283B-page 164

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-10: PxOVDCON: OVERRIDE CONTROL REGISTER⁽¹⁾

U-0

—

U-0

—

R/W-1

POVD3H

POVD3L

POVD2H

POVD2L

POVD1H

POVD1L

bit 15

bit 8

U-0

—

U-0

—

R/W-0

POUT3H

POUT3L

POUT2H

POUT2L

POUT1H

POUT1L

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-14

bit 13-8

Unimplemented: Read as ‘0’

POVDxH<3:1>:POVDxL<3:1>: PWM Output Override bits

1= Output on PWMx I/O pin is controlled by the PWM generator

0= Output on PWMx I/O pin is controlled by the value in the corresponding POUTxH:POUTxL bit

bit 7-6

bit 5-0

Unimplemented: Read as ‘0’

POUTxH<3:1>:POUTxL<3:1>: PWM Manual Output bits

1= PWMx I/O pin is driven active when the corresponding POVDxH:POVDxL bit is cleared

0= PWMx I/O pin is driven inactive when the corresponding POVDxH:POVDxL bit is cleared

Note 1: PWM2 supports only 1 PWM I/O pin pair.

Preliminary

DS70283B-page 165

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-11: PxDC1: PWM DUTY CYCLE REGISTER 1

R/W-0

bit 15

R/W-0

bit 8

R/W-0

PDC1<15:8>

R/W-0

PDC1<7:0>

R/W-0

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-0

PDC1<15:0>: PWM Duty Cycle #1 Value bits

REGISTER 14-12: P1DC2: PWM DUTY CYCLE REGISTER 2

R/W-0

bit 15

R/W-0

bit 8

R/W-0

PDC2<15:8>

R/W-0

PDC2<7:0>

R/W-0

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-0

PDC2<15:0>: PWM Duty Cycle #2 Value bits

DS70283B-page 166

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 14-13: P1DC3: PWM DUTY CYCLE REGISTER 3

R/W-0

bit 15

R/W-0

bit 8

R/W-0

PDC3<15:8>

R/W-0

PDC3<7:0>

R/W-0

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-0

PDC3<15:0>: PWM Duty Cycle #3 Value bits

Preliminary

DS70283B-page 167

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 168

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

The operational features of the QEI include:

15.0 QUADRATURE ENCODER

• Three input channels for two phase signals and

index pulse

INTERFACE (QEI) MODULE

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

• 16-bit up/down position counter

• Count direction status

• Position Measurement (x2 and x4) mode

• Programmable digital noise filters on inputs

• Alternate 16-bit Timer/Counter mode

• Quadrature Encoder Interface interrupts

These operating modes are determined by setting the

appropriate bits, QEIM<2:0> in (QEICON<10:8>).

Figure 15-1 depicts the Quadrature Encoder Interface

block diagram.

This section describes the Quadrature Encoder Inter-

face (QEI) module and associated operational modes.

The QEI module provides the interface to incremental

encoders for obtaining mechanical position data.

FIGURE 15-1:

QUADRATURE ENCODER INTERFACE BLOCK DIAGRAM

TQCKPS<1:0>

Sleep Input

TQCS

2

TCY

0

1

Synchronize

Det

Prescaler

1, 8, 64, 256

1

0

QEIM<2:0>

QEIIF

Event

Flag

D

Q

TQGATE

CK

16-bit Up/Down Counter

(POSCNT)

2

Programmable

Digital Filter

QEA

Reset

Equal

Quadrature

Encoder

Interface Logic

UPDN_SRC

Comparator/

Zero Detect

QEICON<11>

0

1

3

QEIM<2:0>

Mode Select

Max Count Register

(MAXCNT)

Programmable

Digital Filter

QEB

Programmable

Digital Filter

INDX

3

PCDOUT

Existing Pin Logic

0

UPDN

Up/Down

1

Preliminary

DS70283B-page 169

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

If the POSRES bit is set to ‘1’, the position counter is

reset when the index pulse is detected. If the POSRES

bit is set to ‘0’, the position counter is not reset when

15.1 Quadrature Encoder Interface

Logic

A typical incremental (or optical) encoder has three out-

puts: Phase A, Phase B and an index pulse. These sig-

nals are useful and often required in position and speed

control of ACIM and SR motors.

the index pulse is detected. The position counter con-

tinues counting up or down, and is reset on the rollover

or underflow condition.

The interrupt is still generated on the detection of the

index pulse and not on the position counter overflow/

underflow.

The two channels, Phase A (QEA) and Phase B (QEB),

have a unique relationship. If Phase A leads Phase B,

the direction of the motor is deemed positive or for-

ward. If Phase A lags Phase B, the direction of the

motor is deemed negative or reverse.

15.2.3

COUNT DIRECTION STATUS

The QEI logic generates a UPDN signal, based upon

the relationship between Phase A and Phase B. In

addition to the output pin, the state of this internal

UPDN signal is supplied to an SFR bit, UPDN

(QEICON<11>), as a read-only bit. To place the state of

this signal on an I/O pin, the SFR bit, PCDOUT

(QEICON<6>), must be set to ‘1’.

A third channel, termed index pulse, occurs once per

revolution and is used as a reference to establish an

absolute position. The index pulse coincides with

Phase A and Phase B, both low.

15.2 16-bit Up/Down Position

Counter Mode

15.3 Position Measurement Mode

The 16-bit up/down counter counts up or down on

every count pulse, which is generated by the difference

of the Phase A and Phase B input signals. The counter

acts as an integrator whose count value is proportional

to position. The direction of the count is determined by

the UPDN signal, which is generated by the

Quadrature Encoder Interface logic.

Two measurement modes are supported, x2 and x4.

These modes are selected by the QEIM<2:0> mode

select bits located in SFR QEICON<10:8>.

When control bits QEIM<2:0> = 100 or 101, the x2

Measurement mode is selected and the QEI logic only

looks at the Phase A input for the position counter

increment rate. Every rising and falling edge of the

Phase A signal causes the position counter to be incre-

mented or decremented. The Phase B signal is still

used for the determination of the counter direction.

15.2.1

POSITION COUNTER ERROR

CHECKING

Position counter error checking in the QEI is provided

for and indicated by the CNTERR bit (QEICON<15>).

The error checking applies only when the position

counter is configured for Reset on the Index Pulse

modes (QEIM<2:0> = 110or 100). In these modes, the

contents of the POSCNT register are compared with

the values (0xFFFF or MAXCNT + 1, depending on

direction).

Within the x2 Measurement mode, there are two

variations of how the position counter is reset:

• Position counter reset by detection of index pulse,

QEIM<2:0> = 100

• Position counter reset by match with MAXCNT,

QEIM<2:0> = 101

When control bits QEIM<2:0> = 110 or 111, the x4

Measurement mode is selected and the QEI logic looks

at both edges of the Phase A and Phase B input sig-

nals. Every edge of both signals causes the position

counter to increment or decrement.

If these values are detected, the CNTERR bit is set,

generating an error condition, and a QEI counter error

interrupt is generated. The QEI counter error interrupt

can be disabled by setting the CEID bit

(DFLTCON<8>).

Within the x4 Measurement mode, the position counter

can be reset two ways:

The position counter continues to count encoder edges

after an error has been detected. The POSCNT regis-

ter continues to count up/down until a natural rollover/

underflow. No interrupt is generated for the natural roll-

over/underflow event.

• Position counter reset by detection of index pulse,

QEIM<2:0> = 110.

• Position counter reset by match with MAXCNT,

QEIM<2:0> = 111.

The CNTERR bit is a read/write bit and is reset in soft-

ware by the user application.

The x4 Measurement mode provides for finer resolu-

tion data (more position counts) for determining motor

position.

15.2.2

POSITION COUNTER RESET

The Position Counter Reset Enable bit, POSRES

(QEI<2>), controls whether the position counter is reset

when the index pulse is detected. This bit is applicable

only when QEIM<2:0> = 100or 110.

DS70283B-page 170

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

In addition, control bit UPDN_SRC, (in QEICON<0>),

15.4 Programmable Digital Noise

determines whether the timer count direction state is

based on the logic state written into the UPDN control/

status bit (QEICON<11>) or the QEB pin state:

Filters

The digital noise filter section of the module is

responsible for rejecting noise on the incoming capture

or quadrature signals. Schmitt Trigger inputs and a 3-

clock cycle delay filter combine to reject low-level noise

and large, short-duration noise spikes that typically

occur in noise prone applications, such as a motor

system.

• When UPDN_SRC = 1, the timer count direction

is controlled from the QEB pin.

• When UPDN_SRC = 0, the timer count direction

is controlled by the UPDN bit.

Note:

This alternate timer does not support the

External Asynchronous Counter mode of

operation. If the program uses an external

clock source, the clock will automatically

be synchronized to the internal instruction

cycle.

The filter ensures that the filtered output signal is not

permitted to change until a stable value has been

registered for three consecutive clock cycles.

For the QEA, QEB and INDX pins, the clock divide

frequency for the digital filter is programmed by bits

QECK<2:0> (DFLTCON<6:4>), and are derived from

the base instruction cycle, TCY.

15.6 QEI Module Operation During CPU

Sleep Mode

To enable the filter output for channels QEA, QEB and

INDX, the QEOUT bit must be ‘1’. The filter network for

all channels is disabled on POR.

During CPU Sleep mode, the following are true for the

QEI module:

• The QEI module is halted.

15.5 Alternate 16-bit Timer/Counter

• The timer does not operate because the internal

clocks are disabled.

When the QEI module is not configured for the QEI

mode, QEIM<2:0> = 001, the module can be con-

figured as a simple 16-bit timer/counter. The setup and

control of the auxiliary timer is accomplished through

the QEICON SFR register. This timer functions identi-

cally to Timer1. The QEA pin is used as the timer clock

input.

15.7 QEI Module Operation During CPU

Idle Mode

Since the QEI module can function as a Quadrature

Encoder Interface, or as a 16-bit timer, this section

describes operation of the module in both modes.

When configured as a timer, the POSCNT register

serves as the Timer Count register, and the MAXCNT

register serves as the Period register. When a Timer/

Period register match occurs, the QEI interrupt flag is

asserted.

15.7.1

QEI OPERATION DURING CPU

IDLE MODE

When the CPU is placed in Idle mode, the QEI module

will operate if QEISIDL (QEICON<13>) = 0. This bit

defaults to a logic ‘0’ upon executing POR. To halt the

QEI module during CPU Idle mode, QEISIDL should

be set to ‘1’.

The only difference between the general purpose

timers and this timer is the external up/down input

select. When the UPDN pin is asserted high, the timer

increments up. When the UPDN pin is asserted low, the

timer is decremented.

Note:

Changing the operational mode (for exam-

ple, from QEI to timer or vice versa) will not

affect the Timer/Position Count register

contents.

The UPDN control/status bit (QEICON<11>) can be

used to select the count direction state of the Timer

register. When UPDN = 1, the timer counts up. When

UPDN = 0, the timer counts down.

Preliminary

DS70283B-page 171

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

15.7.2

TIMER OPERATION DURING CPU

IDLE MODE

15.9 Control and Status Registers

The QEI module has four user-accessible registers,

accessible in either Byte or Word mode:

When the CPU is placed in Idle mode and the QEI mod-

ule is configured in 16-bit Timer mode, the 16-bit timer

will operate if QEISIDL (QEICON<13>) = 0. This bit

defaults to a logic ‘0’ upon executing POR. To halt the

timer module during CPU Idle mode, QEISIDL should

be set to ‘1’.

• Control/Status Register (QEICON) – Allows con-

trol of the QEI operation and status flags indicat-

ing the module state.

• Digital Filter Control Register (DFLTCON) –

Allows control of the digital input filter operation.

If the QEISIDL bit is cleared, the timer will function

normally as if CPU Idle mode had not been entered.

• Position Count Register (POSCNT) – Allows

reading and writing of the 16-bit position counter.

• Maximum Count Register (MAXCNT) – Holds a

value that is compared to the POSCNT counter in

some operations.

15.8 Quadrature Encoder Interface

Interrupts

The Quadrature Encoder Interface can generate an

interrupt on occurrence of the following events:

Note:

The POSCNT register allows byte

accesses,. However, reading the register

in Byte mode can result in partially

updated values in subsequent reads.

Either use Word mode reads/writes, or

ensure that the counter is not counting

during Byte operations.

• 16-bit up/down position counter rollover/underflow

• Detection of qualified index pulse

• CNTERR bit is set

• Timer period match event (overflow/underflow)

• Gate accumulation event

The QEI Interrupt Flag bit, QEIIF in the IFS3 register, is

asserted upon occurrence of any of these events. The

QEIIF bit must be cleared in software.

Enabling an interrupt is accomplished via the respec-

tive enable bit, QEIIE, in the IEC3 register.

DS70283B-page 172

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 15-1: QEICON: QEI CONTROL REGISTER

R/W-0

U-0

—

R/W-0

R-0

R/W-0

UPDN

R/W-0

bit 8

CNTERR

QEISIDL

INDEX

QEIM<2:0>

bit 15

R/W-0

TQCS

R/W-0

UPDN_SRC

bit 0

SWPAB

PCDOUT

TQGATE

TQCKPS<1:0>

POSRES

bit 7

Legend:

R = Readable bit

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

-n = Value at POR

bit 15

CNTERR: Count Error Status Flag bit

1= Position count error has occurred

0= No position count error has occurred

Note:

CNTERR flag only applies when QEIM<2:0> = ‘110’ or ‘100’.

bit 14

bit 13

Unimplemented: Read as ‘0’

QEISIDL: Stop in Idle Mode bit

1= Discontinue module operation when device enters Idle mode

0= Continue module operation in Idle mode

bit 12

bit 11

INDEX: Index Pin State Status bit (Read-Only)

1= Index pin is High

0= Index pin is Low

UPDN: Position Counter Direction Status bit

1= Position Counter Direction is positive (+)

0= Position Counter Direction is negative (-)

(Read-only bit when QEIM<2:0> = ‘1XX’)

(Read/Write bit when QEIM<2:0> = ‘001’)

bit 10-8

QEIM<2:0>: Quadrature Encoder Interface Mode Select bits

111= Quadrature Encoder Interface enabled (x4 mode) with position counter reset by match

(MAXCNT)

110= Quadrature Encoder Interface enabled (x4 mode) with Index Pulse reset of position counter

101= Quadrature Encoder Interface enabled (x2 mode) with position counter reset by match

(MAXCNT)

100= Quadrature Encoder Interface enabled (x2 mode) with Index Pulse reset of position counter

011= Unused (Module disabled)

010= Unused (Module disabled)

001= Starts 16-bit Timer

000= Quadrature Encoder Interface/Timer off

bit 7

bit 6

bit 5

SWPAB: Phase A and Phase B Input Swap Select bit

1= Phase A and Phase B inputs swapped

0= Phase A and Phase B inputs not swapped

PCDOUT: Position Counter Direction State Output Enable bit

1= Position Counter Direction Status Output Enable (QEI logic controls state of I/O pin)

0= Position Counter Direction Status Output Disabled (Normal I/O pin operation)

TQGATE: Timer Gated Time Accumulation Enable bit

1= Timer gated time accumulation enabled

0= Timer gated time accumulation disabled

Preliminary

DS70283B-page 173

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 15-1: QEICON: QEI CONTROL REGISTER (CONTINUED)

bit 4-3

TQCKPS<1:0>: Timer Input Clock Prescale Select bits

11= 1:256 prescale value

10= 1:64 prescale value

01= 1:8 prescale value

00= 1:1 prescale value

(Prescaler utilized for 16-bit Timer mode only)

POSRES: Position Counter Reset Enable bit

1= Index Pulse resets Position Counter

0= Index Pulse does not reset Position Counter

bit 2

Note:

Bit applies only when QEIM<2:0> = 100or 110.

bit 1

bit 0

TQCS: Timer Clock Source Select bit

1 = External clock from pin QEA (on the rising edge)

0= Internal clock (TCY)

UPDN_SRC: Position Counter Direction Selection Control bit

1= QEB pin state defines position counter direction

0= Control/Status bit, UPDN (QEICON<11>), defines timer counter (POSCNT) direction

Note:

When configured for QEI mode, control bit is a ‘don’t care’.

DS70283B-page 174

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 15-2: DFLTCON: DIGITAL FILTER CONTROL REGISTER

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

CEID

IMV<2:0>

bit 15

bit 8

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

QEOUT

QECK<2:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-11

bit 10-9

Unimplemented: Read as ‘0’

IMV<1:0>: Index Match Value bits – These bits allow the user application to specify the state of the

QEA and QEB input pins during an Index pulse when the POSCNT register is to be reset.

In 4X Quadrature Count Mode:

IMV1= Required State of Phase B input signal for match on index pulse

IMV0= Required State of Phase A input signal for match on index pulse

In 2X Quadrature Count Mode:

IMV1= Selects Phase input signal for Index state match (0= Phase A, 1= Phase B)

IMV0= Required state of the selected Phase input signal for match on index pulse

bit 8

CEID: Count Error Interrupt Disable bit

1= Interrupts due to count errors are disabled

0= Interrupts due to count errors are enabled

bit 7

QEOUT: QEA/QEB/INDX Pin Digital Filter Output Enable bit

1= Digital filter outputs enabled

0= Digital filter outputs disabled (normal pin operation)

bit 6-4

QECK<2:0>: QEA/QEB/INDX Digital Filter Clock Divide Select Bits

111= 1:256 Clock Divide

110= 1:128 Clock Divide

101= 1:64 Clock Divide

100= 1:32 Clock Divide

011= 1:16 Clock Divide

010= 1:4 Clock Divide

001= 1:2 Clock Divide

000= 1:1 Clock Divide

bit 3-0

Unimplemented: Read as ‘0’

Preliminary

DS70283B-page 175

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 176

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

16.3 Transmit Operations

16.0 SERIAL PERIPHERAL

INTERFACE (SPI)

Transmit writes are also double-buffered. The user appli-

cation writes to SPIxBUF. When the Master or Slave

transfer is completed, the contents of the shift register

(SPIxSR) are moved to the receive buffer. If any transmit

data has been written to the buffer register, the contents

of the transmit buffer are moved to SPIxSR. The received

data is thus placed in SPIxBUF and the transmit data in

SPIxSR is ready for the next transfer.

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

Note:

Both the transmit buffer (SPIxTXB) and

the receive buffer (SPIxRXB) are mapped

to the same register address, SPIxBUF.

Do not perform read-modify-write opera-

tions (such as bit-oriented instructions) on

the SPIxBUF register.

The Serial Peripheral Interface (SPI) module is a syn-

chronous serial interface useful for communicating with

other peripheral or microcontroller devices. These

peripheral devices can be serial EEPROMs, shift regis-

ters, display drivers, analog-to-digital converters, etc.

The SPI module is compatible with SPI and SIOP from

Motorola^®.

16.4 SPI Setup: Master Mode

To set up the SPI module for the Master mode of

operation:

Each SPI module consists of a 16-bit shift register,

SPIxSR (where x = 1 or 2), used for shifting data in and

out, and a buffer register, SPIxBUF. A control register,

SPIxCON, configures the module. Additionally, a status

register, SPIxSTAT, indicates status conditions.

1. If using interrupts:

a) Clear the SPIxIF bit in the respective IFSn

register.

b) Set the SPIxIE bit in the respective IECn

register.

The serial interface consists of 4 pins:

c) Write the SPIxIP bits in the respective IPCn

register to set the interrupt priority.

• SDIx (serial data input)

• SDOx (serial data output)

• SCKx (shift clock input or output)

• SSx (active low slave select).

2. Write the desired settings to the SPIxCON

register with MSTEN (SPIxCON1<5>) = 1.

3. Clear the SPIROV bit (SPIxSTAT<6>).

In Master mode operation, SCK is a clock output. In

Slave mode, it is a clock input.

4. Enable SPI operation by setting the SPIEN bit

(SPIxSTAT<15>).

5. Write the data to be transmitted to the SPIxBUF

register. Transmission (and reception) will start as

soon as data is written to the SPIxBUF register.

16.1 Interrupts

A series of 8 or 16 clock pulses shift out bits from the

SPIxSR to SDOx pin and simultaneously shift in data

from the SDIx pin. An interrupt is generated when the

transfer is complete and the corresponding interrupt flag

bit (SPI1IF) is set. This interrupt can be disabled through

an interrupt enable bit (SPI1IE).

16.2 Receive Operations

The receive operation is double-buffered. When a com-

plete byte is received, it is transferred from SPIxSR to

SPIxBUF.

If the receive buffer is full when new data is being trans-

ferred from SPIxSR to SPIxBUF, the module sets the

SPIROV bit, indicating an overflow condition. The trans-

fer of the data from SPIxSR to SPIxBUF is not com-

pleted, and the new data is lost. The module will not

respond to SCL transitions while SPIROV is ‘1’, effec-

tively disabling the module until SPIxBUF is read by user

software.

Preliminary

DS70283B-page 177

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

3. Write the desired settings to the SPIxCON1 and

16.5 SPI Setup: Slave Mode

SPIxCON2

registers

with

MSTEN

To set up the SPI module for the Slave mode of operation:

(SPIxCON1<5>) = 0.

1. Clear the SPIxBUF register.

2. If using interrupts:

4. Clear the SMP bit.

5. If the CKE bit is set, then set the SSEN bit

(SPIxCON1<7>) to enable the SSx pin.

a) Clear the SPIxIF bit in the respective IFSn

register.

6. Clear the SPIROV bit (SPIxSTAT<6>).

b) Set the SPIxIE bit in the respective IECn

register.

7. Enable SPI operation by setting the SPIEN bit

(SPIxSTAT<15>).

c) Write the SPIxIP bits in the respective IPCn

register to set the interrupt priority.

The SPI module generates an interrupt indicating com-

pletion of a byte or word transfer, as well as a separate

interrupt for all SPI error conditions.

FIGURE 16-1:

SPI MODULE BLOCK DIAGRAM

SCKx

1:1 to 1:8

Secondary

Prescaler

1:1/4/16/64

Primary

Prescaler

FCY

SSx

Sync

Control

Select

Edge

Control

Clock

SPIxCON1<1:0>

SPIxCON1<4:2>

Shift Control

SDOx

SDIx

Enable

Master Clock

bit 0

SPIxSR

Transfer

SPIxRXB SPIxTXB

SPIxBUF

Write SPIxBUF

Read SPIxBUF

16

Internal Data Bus

DS70283B-page 178

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 16-2:

SPI MASTER/SLAVE CONNECTION

PROCESSOR 1 (SPI Master)

PROCESSOR 2 (SPI Slave)

SDOx

SDIx

Serial Receive Buffer

(SPIxRXB)

Serial Receive Buffer

(SPIxRXB)

SDIx

SDOx

Shift Register

(SPIxSR)

Shift Register

(SPIxSR)

LSb

MSb

LSb

Serial Transmit Buffer

(SPIxTXB)

Serial Transmit Buffer

(SPIxTXB)

Serial Clock

SCKx

SSx⁽¹⁾

SPI Buffer

(SPIxBUF)⁽²⁾

(MSTEN (SPIxCON1<5>) = 1)

(SSEN (SPIxCON1<7>) = 1and MSTEN (SPIxCON1<5>) = 0)

Note 1: Using the SSx pin in Slave mode of operation is optional.

2: User application must write transmit data to or read received data from SPIxBUF. The SPIxTXB and SPIxRXB regis-

ters are memory mapped to SPIxBUF.

FIGURE 16-3:

SPI MASTER, FRAME MASTER CONNECTION DIAGRAM

dsPIC33F

PROCESSOR 2

SDIx

SDOx

SDIx

SDOx

Serial Clock

SCKx

SSx

SCKx

SSx

Frame Sync

Pulse

FIGURE 16-4:

SPI MASTER, FRAME SLAVE CONNECTION DIAGRAM

dsPIC33F

PROCESSOR 2

SDOx

SDIx

SDOx

Serial Clock

SCKx

SSx

SCKx

SSx

Frame Sync

Pulse

Preliminary

DS70283B-page 179

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 16-5:

SPI SLAVE, FRAME MASTER CONNECTION DIAGRAM

dsPIC33F

PROCESSOR 2

SDOx

SDIx

SDOx

Serial Clock

SCKx

SSx

SCKx

SSx

Frame Sync

Pulse

FIGURE 16-6:

SPI SLAVE, FRAME SLAVE CONNECTION DIAGRAM

dsPIC33F

PROCESSOR 2

SDOx

SDIx

SDOx

Serial Clock

SCKx

SSx

SCKx

SSx

Frame Sync

Pulse

EQUATION 16-1: RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED

FCY

FSCK =

Primary Prescaler * Secondary Prescaler

TABLE 16-1: SAMPLE SCKx FREQUENCIES

Secondary Prescaler Settings

FCY = 40 MHz

1:1

2:1

4:1

6:1

8:1

Primary Prescaler Settings

1:1

4:1

Invalid

10000

2500

625

Invalid

5000

10000

2500

6666.67

1666.67

416.67

104.17

5000

1250

16:1

64:1

1250

625

312.50

78.125

312.5

156.25

FCY = 5 MHz

Primary Prescaler Settings

1:1

4:1

5000

1250

313

78

2500

625

156

39

1250

313

78

833

208

52

625

156

39

16:1

64:1

20

13

10

Note: SCKx frequencies shown in kHz.

DS70283B-page 180

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 16-1: SPIxSTAT: SPIx STATUS AND CONTROL REGISTER

R/W-0

SPIEN

U-0

—

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

SPISIDL

bit 15

bit 8

U-0

—

R/C-0

U-0

—

U-0

—

U-0

—

U-0

—

R-0

SPIROV

SPITBF

SPIRBF

bit 0

bit 7

Legend:

C = Clearable bit

W = Writable bit

‘1’ = Bit is set

R = Readable bit

-n = Value at POR

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

SPIEN: SPIx Enable bit

1= Enables module and configures SCKx, SDOx, SDIx and SSx as serial port pins

0= Disables module

bit 14

bit 13

Unimplemented: Read as ‘0’

SPISIDL: Stop in Idle Mode bit

1= Discontinue module operation when device enters Idle mode

0= Continue module operation in Idle mode

bit 12-7

bit 6

Unimplemented: Read as ‘0’

SPIROV: Receive Overflow Flag bit

1= A new byte/word is completely received and discarded. The user software has not read the

previous data in the SPIxBUF register.

0= No overflow has occurred.

bit 5-2

bit 1

Unimplemented: Read as ‘0’

SPITBF: SPIx Transmit Buffer Full Status bit

1= Transmit not yet started, SPIxTXB is full

0= Transmit started, SPIxTXB is empty

Automatically set in hardware when CPU writes SPIxBUF location, loading SPIxTXB

Automatically cleared in hardware when SPIx module transfers data from SPIxTXB to SPIxSR

bit 0

SPIRBF: SPIx Receive Buffer Full Status bit

1= Receive complete, SPIxRXB is full

0= Receive is not complete, SPIxRXB is empty

Automatically set in hardware when SPIx transfers data from SPIxSR to SPIxRXB

Automatically cleared in hardware when core reads SPIxBUF location, reading SPIxRXB

Preliminary

DS70283B-page 181

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 16-2: SPIXCON1: SPIx CONTROL REGISTER 1

U-0

—

U-0

—

U-0

—

R/W-0

SMP

R/W-0

CKE⁽¹⁾

DISSCK

DISSDO

MODE16

bit 15

bit 8

R/W-0

SSEN

R/W-0

CKP

R/W-0

MSTEN

SPRE<2:0>

PPRE<1:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

bit 12

Unimplemented: Read as ‘0’

DISSCK: Disable SCKx pin bit (SPI Master modes only)

1= Internal SPI clock is disabled, pin functions as I/O

0= Internal SPI clock is enabled

bit 11

bit 10

bit 9

DISSDO: Disable SDOx pin bit

1= SDOx pin is not used by module; pin functions as I/O

0= SDOx pin is controlled by the module

MODE16: Word/Byte Communication Select bit

1= Communication is word-wide (16 bits)

0= Communication is byte-wide (8 bits)

SMP: SPIx Data Input Sample Phase bit

Master mode:

1= Input data sampled at end of data output time

0= Input data sampled at middle of data output time

Slave mode:

SMP must be cleared when SPIx is used in Slave mode.

bit 8

bit 7

bit 6

bit 5

CKE: SPIx Clock Edge Select bit⁽¹⁾

1= Serial output data changes on transition from active clock state to Idle clock state (see bit 6)

0= Serial output data changes on transition from Idle clock state to active clock state (see bit 6)

SSEN: Slave Select Enable bit (Slave mode)

1= SSx pin used for Slave mode

0= SSx pin not used by module. Pin controlled by port function.

CKP: Clock Polarity Select bit

1= Idle state for clock is a high level; active state is a low level

0= Idle state for clock is a low level; active state is a high level

MSTEN: Master Mode Enable bit

1= Master mode

0= Slave mode

Note 1: The CKE bit is not used in the Framed SPI modes. Program this bit to ‘0’ for the Framed SPI modes

(FRMEN = 1).

DS70283B-page 182

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 16-2: SPIXCON1: SPIx CONTROL REGISTER 1 (CONTINUED)

bit 4-2

SPRE<2:0>: Secondary Prescale bits (Master mode)

111= Secondary prescale 1:1

110= Secondary prescale 2:1

.

000= Secondary prescale 8:1

bit 1-0

PPRE<1:0>: Primary Prescale bits (Master mode)

11= Primary prescale 1:1

10= Primary prescale 4:1

01= Primary prescale 16:1

00= Primary prescale 64:1

Note 1: The CKE bit is not used in the Framed SPI modes. Program this bit to ‘0’ for the Framed SPI modes

(FRMEN = 1).

Preliminary

DS70283B-page 183

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 16-3: SPIxCON2: SPIx CONTROL REGISTER 2

R/W-0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

FRMEN

SPIFSD

FRMPOL

bit 15

bit 8

bit 0

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

U-0

—

FRMDLY

bit 7

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

bit 14

bit 13

FRMEN: Framed SPIx Support bit

1= Framed SPIx support enabled (SSx pin used as frame sync pulse input/output)

0= Framed SPIx support disabled

SPIFSD: Frame Sync Pulse Direction Control bit

1= Frame sync pulse input (slave)

0= Frame sync pulse output (master)

FRMPOL: Frame Sync Pulse Polarity bit

1= Frame sync pulse is active-high

0= Frame sync pulse is active-low

bit 12-2

bit 1

Unimplemented: Read as ‘0’

FRMDLY: Frame Sync Pulse Edge Select bit

1= Frame sync pulse coincides with first bit clock

0= Frame sync pulse precedes first bit clock

bit 0

Unimplemented: This bit must not be set to ‘1’ by the user application.

DS70283B-page 184

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

2

17.2 I C Registers

17.0 INTER-INTEGRATED CIRCUIT

2

(I C)

I2CxCON and I2CxSTAT are control and status

registers, respectively. The I2CxCON register is

readable and writable. The lower six bits of I2CxSTAT

are read-only. The remaining bits of the I2CSTAT are

read/write:

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

• I2CxRSR is the shift register used for shifting

data.

• I2CxRCV is the receive buffer and the register to

which data bytes are written, or from which data

bytes are read.

• I2CxTRN is the transmit register to which bytes

are written during a transmit operation.

The Inter-Integrated Circuit (I²C) module provides

complete hardware support for both Slave and Multi-

Master modes of the I²C serial communication

standard, with a 16-bit interface.

• The I2CxADD register holds the slave address.

• A status bit, ADD10, indicates 10-bit Address

mode.

The I²C module has a 2-pin interface:

• The I2CxBRG acts as the Baud Rate Generator

(BRG) reload value.

• The SCLx pin is clock.

• The SDAx pin is data.

The I²C module offers the following key features:

• I²C interface supporting both Master and Slave

modes of operation.

In receive operations, I2CxRSR and I2CxRCV together

form a double-buffered receiver. When I2CxRSR

receives a complete byte, it is transferred to I2CxRCV,

and an interrupt pulse is generated.

• I²C Slave mode supports 7 and 10-bit address.

• I²C Master mode supports 7 and 10-bit address.

• I²C port allows bidirectional transfers between

master and slaves.

• Serial clock synchronization for I²C port can be

used as a handshake mechanism to suspend and

resume serial transfer (SCLREL control).

2

17.3 I C Interrupts

The I²C module generates two interrupt flags:

• MI2CxIF (I²C Master Events Interrupt flag)

• SI2CxIF (I²C Slave Events Interrupt flag).

A separate interrupt is generated for all I²C error

conditions.

• I²C supports multi-master operation, detects bus

collision and arbitrates accordingly.

17.4 Baud Rate Generator

In I²C Master mode, the reload value for the Baud Rate

Generator (BRG) is located in the I2CxBRG register.

When the BRG is loaded with this value, the BRG

counts down to zero and stops until another reload has

taken place. If clock arbitration is taking place, for

example, the BRG is reloaded when the SCLx pin is

sampled high.

As per the I²C standard, FSCL can be 100 kHz or

400 kHz. However, the user application can specify any

baud rate up to 1 MHz. I2CxBRG values of ‘0’ or ‘1’ are

illegal.

17.1 Operating Modes

The hardware fully implements all the master and slave

functions of the I²C Standard and Fast mode

specifications, as well as 7 and 10-bit addressing.

The I²C module can operate either as a slave or a

master on an I²C bus.

The following types of I²C operation are supported:

• I²C slave operation with 7-bit address

• I²C slave operation with 10-bit address

• I²C master operation with 7 or 10-bit address

EQUATION 17-1: SERIAL CLOCK RATE

For details about the communication sequence in each

of these modes, refer to the “dsPIC33F Family

Reference Manual”. Please see the Microchip web site

(www.microchip.com) for the latest dsPIC33F Family

Reference Manual sections.

FCY

FSCL

FCY

10,000,000

– 1

–

I2CxBRG =

)

(

Preliminary

DS70283B-page 185

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 17-1:

I²C™ BLOCK DIAGRAM (X = 1)

Internal

Data Bus

I2CxRCV

Read

Shift

Clock

SCLx

SDAx

I2CxRSR

LSb

Address Match

Write

Read

Match Detect

I2CxMSK

Write

Read

I2CxADD

Start and Stop

Bit Detect

Write

Start and Stop

Bit Generation

I2CxSTAT

I2CxCON

Read

Write

Collision

Detect

Acknowledge

Generation

Read

Clock

Stretching

Write

Read

I2CxTRN

LSb

Shift Clock

Reload

Control

Write

Read

BRG Down Counter

TCY/2

I2CxBRG

DS70283B-page 186

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

2

17.5 I C Module Addresses

17.8 General Call Address Support

The 10-bit I2CxADD register contains the Slave mode

addresses.

The general call address can address all devices.

When this address is used, all devices should, in

theory, respond with an Acknowledgement.

If the A10M bit (I2CxCON<10>) is ‘0’, the address is

interpreted by the module as a 7-bit address. When an

address is received, it is compared to the 7 Least

Significant bits of the I2CxADD register.

The general call address is one of eight addresses

reserved for specific purposes by the I²C protocol. It

consists of all ‘0’s with R_W = 0.

If the A10M bit is ‘1’, the address is assumed to be a

10-bit address. When an address is received, it is com-

pared with the binary value, ‘11110 A9 A8’ (where A9

and A8 are two Most Significant bits of I2CxADD). If

that value matches, the next address will be compared

with the Least Significant 8 bits of I2CxADD, as

specified in the 10-bit addressing protocol.

The general call address is recognized when the General

Call Enable (GCEN) bit is set (I2CxCON<7> = 1). When

the interrupt is serviced, the source for the interrupt can

be checked by reading the contents of the I2CxRCV to

determine if the address was device-specific or a general

call address.

17.9 Automatic Clock Stretch

TABLE 17-1: 7-BIT I²C™ SLAVE

ADDRESSES SUPPORTED BY

dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304

In Slave modes, the module can synchronize buffer

reads and write to the master device by clock stretching.

17.9.1

TRANSMIT CLOCK STRETCHING

0x00

General call address or Start byte

Reserved

Both 10-bit and 7-bit Transmit modes implement clock

stretching by asserting the SCLREL bit after the falling

edge of the ninth clock, if the TBF bit is cleared,

indicating the buffer is empty.

0x01-0x03

0x04-0x07

0x08-0x77

0x78-0x7b

Hs mode Master codes

Valid 7-bit addresses

In Slave Transmit modes, clock stretching is always

performed, irrespective of the STREN bit. The user’s

ISR must set the SCLREL bit before transmission is

allowed to continue. By holding the SCLx line low, the

user application has time to service the ISR and load

the contents of the I2CxTRN before the master device

can initiate another transmit sequence.

Valid 10-bit addresses

(lower 7 bits)

0x7c-0x7f

Reserved

17.6 Slave Address Masking

The I2CxMSK register (Register 17-3) designates

address bit positions as “don’t care” for both 7-bit and

10-bit Address modes. Setting a particular bit location

(= 1) in the I2CxMSK register causes the slave module

to respond, whether the corresponding address bit

value is a ‘0’ or ‘1’. For example, when I2CxMSK is set

to ‘00100000’, the Slave module will detect both

addresses, ‘0000000’ and ‘00100000’.

17.9.2

RECEIVE CLOCK STRETCHING

The STREN bit in the I2CxCON register can be used to

enable clock stretching in Slave Receive mode. When

the STREN bit is set, the SCLx pin will be held low at

the end of each data receive sequence.

The user’s ISR must set the SCLREL bit before recep-

tion is allowed to continue. By holding the SCLx line

low, the user application has time to service the ISR

and read the contents of the I2CxRCV before the mas-

ter device can initiate another receive sequence. This

prevents buffer overruns.

To enable address masking, the IPMI (Intelligent

Peripheral Management Interface) must be disabled by

clearing the IPMIEN bit (I2CxCON<11>).

17.7 IPMI Support

The control bit IPMIEN enables the module to support

the Intelligent Peripheral Management Interface (IPMI).

When this bit is set, the module accepts and acts upon

all addresses.

17.10 Software Controlled Clock

Stretching (STREN = 1)

When the STREN bit is ‘1’, the software can clear the

SCLREL bit to allow software to control the clock

stretching.

If the STREN bit is ‘0’, a software write to the SCLREL

bit is disregarded and has no effect on the SCLREL bit.

Preliminary

DS70283B-page 187

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

17.11 Slope Control

17.13 Multi-Master Communication, Bus

Collision and Bus Arbitration

The I²C standard requires slope control on the SDAx

and SCLx signals for Fast mode (400 kHz). The control

bit, DISSLW, enables the user application to disable

slew rate control if desired. It is necessary to disable

the slew rate control for 1 MHz mode.

Multi-Master mode support is achieved by bus

arbitration. When the master outputs address/data bits

onto the SDAx pin, arbitration takes place when the

master outputs a ‘1’ on SDAx by letting SDAx float high

while another master asserts a ‘0’. When the SCLx pin

floats high, data should be stable. If the expected data

on SDAx is a ‘1’ and the data sampled on the

SDAx pin = 0, then a bus collision has taken place. The

master sets the I²C master events interrupt flag and

resets the master portion of the I²C port to its Idle state.

17.12 Clock Arbitration

Clock arbitration occurs when the master deasserts the

SCLx pin (SCLx allowed to float high) during any

receive, transmit or Restart/Stop condition. When the

SCLx pin is allowed to float high, the Baud Rate Gen-

erator (BRG) is suspended from counting until the

SCLx pin is actually sampled high. When the SCLx pin

is sampled high, the BRG is reloaded with the contents

of I2CxBRG and begins counting. This process

ensures that the SCLx high time will always be at least

one BRG rollover count in the event that the clock is

held low by an external device.

17.14 Peripheral Pin Select Limitations

The I²C module has limited peripheral pin select func-

tionality. When the ALTI2C bit in the FPOR configura-

tion register is set to ‘1’, I²C module uses SDAx/SLCx

pins. When ALTI2C bit is ‘0’, I²C module uses ASDAx/

ASCLx pins.

DS70283B-page 188

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 17-1: I2CxCON: I2Cx CONTROL REGISTER

R/W-0

I2CEN

U-0

—

R/W-0

R/W-1 HC

SCLREL

R/W-0

A10M

R/W-0

SMEN

I2CSIDL

IPMIEN

DISSLW

bit 15

bit 8

R/W-0

GCEN

R/W-0

R/W-0 HC

ACKEN

R/W-0 HC

RCEN

R/W-0 HC

PEN

R/W-0 HC

RSEN

R/W-0 HC

SEN

STREN

ACKDT

bit 7

bit 0

Legend:

U = Unimplemented bit, read as ‘0’

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

HS = Set in hardware

‘0’ = Bit is cleared

HC = Cleared in hardware

x = Bit is unknown

bit 15

I2CEN: I2Cx Enable bit

1= Enables the I2Cx module and configures the SDAx and SCLx pins as serial port pins

0= Disables the I2Cx module. All I²C pins are controlled by port functions.

bit 14

bit 13

Unimplemented: Read as ‘0’

I2CSIDL: Stop in Idle Mode bit

1= Discontinue module operation when device enters an Idle mode

0= Continue module operation in Idle mode

bit 12

SCLREL: SCLx Release Control bit (when operating as I²C slave)

1= Release SCLx clock

0= Hold SCLx clock low (clock stretch)

If STREN = 1:

Bit is R/W (i.e., software can write ‘0’ to initiate stretch and write ‘1’ to release clock). Hardware clear

at beginning of slave transmission. Hardware clear at end of slave reception.

If STREN = 0:

Bit is R/S (i.e., software can only write ‘1’ to release clock). Hardware clear at beginning of slave

transmission.

bit 11

bit 10

bit 9

IPMIEN: Intelligent Peripheral Management Interface (IPMI) Enable bit

1= IPMI mode is enabled; all addresses Acknowledged

0= IPMI mode disabled

A10M: 10-bit Slave Address bit

1= I2CxADD is a 10-bit slave address

0= I2CxADD is a 7-bit slave address

DISSLW: Disable Slew Rate Control bit

1= Slew rate control disabled

0= Slew rate control enabled

bit 8

SMEN: SMbus Input Levels bit

1= Enable I/O pin thresholds compliant with SMbus specification

0= Disable SMbus input thresholds

bit 7

GCEN: General Call Enable bit (when operating as I²C slave)

1= Enable interrupt when a general call address is received in the I2CxRSR

(module is enabled for reception)

0= General call address disabled

bit 6

STREN: SCLx Clock Stretch Enable bit (when operating as I²C slave)

Used in conjunction with SCLREL bit.

1= Enable software or receive clock stretching

0= Disable software or receive clock stretching

Preliminary

DS70283B-page 189

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 17-1: I2CxCON: I2Cx CONTROL REGISTER (CONTINUED)

bit 5

ACKDT: Acknowledge Data bit (when operating as I²C master, applicable during master receive)

Value that will be transmitted when the software initiates an Acknowledge sequence.

1= Send NACK during Acknowledge

0= Send ACK during Acknowledge

bit 4

ACKEN: Acknowledge Sequence Enable bit

(when operating as I²C master, applicable during master receive)

1= Initiate Acknowledge sequence on SDAx and SCLx pins and transmit ACKDT data bit.

Hardware clear at end of master Acknowledge sequence.

0= Acknowledge sequence not in progress

bit 3

bit 2

bit 1

RCEN: Receive Enable bit (when operating as I²C master)

1= Enables Receive mode for I²C. Hardware clear at end of eighth bit of master receive data byte.

0= Receive sequence not in progress

PEN: Stop Condition Enable bit (when operating as I²C master)

1= Initiate Stop condition on SDAx and SCLx pins. Hardware clear at end of master Stop sequence.

0= Stop condition not in progress

RSEN: Repeated Start Condition Enable bit (when operating as I²C master)

1= Initiate Repeated Start condition on SDAx and SCLx pins. Hardware clear at end of

master Repeated Start sequence.

0= Repeated Start condition not in progress

bit 0

SEN: Start Condition Enable bit (when operating as I²C master)

1= Initiate Start condition on SDAx and SCLx pins. Hardware clear at end of master Start sequence.

0= Start condition not in progress

DS70283B-page 190

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 17-2: I2CxSTAT: I2Cx STATUS REGISTER

R-0 HSC

TRSTAT

U-0

—

U-0

—

U-0

—

R/C-0 HS

BCL

R-0 HSC

GCSTAT

R-0 HSC

ADD10

ACKSTAT

bit 15

bit 8

R/C-0 HS

IWCOL

R/C-0 HS

I2COV

R-0 HSC

D_A

R/C-0 HSC R/C-0 HSC

R-0 HSC

R_W

R-0 HSC

RBF

R-0 HSC

TBF

P

S

bit 7

bit 0

Legend:

U = Unimplemented bit, read as ‘0’

R = Readable bit

W = Writable bit

‘1’ = Bit is set

HS = Set in hardware

‘0’ = Bit is cleared

HSC = Hardware set/cleared

x = Bit is unknown

-n = Value at POR

bit 15

bit 14

ACKSTAT: Acknowledge Status bit

(when operating as I²C master, applicable to master transmit operation)

1= NACK received from slave

0= ACK received from slave

Hardware set or clear at end of slave Acknowledge.

TRSTAT: Transmit Status bit (when operating as I²C master, applicable to master transmit operation)

1= Master transmit is in progress (8 bits + ACK)

0= Master transmit is not in progress

Hardware set at beginning of master transmission. Hardware clear at end of slave Acknowledge.

bit 13-11

bit 10

Unimplemented: Read as ‘0’

BCL: Master Bus Collision Detect bit

1= A bus collision has been detected during a master operation

0= No collision

Hardware set at detection of bus collision.

bit 9

bit 8

bit 7

bit 6

bit 5

bit 4

GCSTAT: General Call Status bit

1= General call address was received

0= General call address was not received

Hardware set when address matches general call address. Hardware clear at Stop detection.

ADD10: 10-bit Address Status bit

1= 10-bit address was matched

0= 10-bit address was not matched

Hardware set at match of 2nd byte of matched 10-bit address. Hardware clear at Stop detection.

IWCOL: Write Collision Detect bit

1= An attempt to write the I2CxTRN register failed because the I²C module is busy

0= No collision

Hardware set at occurrence of write to I2CxTRN while busy (cleared by software).

I2COV: Receive Overflow Flag bit

1= A byte was received while the I2CxRCV register is still holding the previous byte

0= No overflow

Hardware set at attempt to transfer I2CxRSR to I2CxRCV (cleared by software).

D_A: Data/Address bit (when operating as I²C slave)

1= Indicates that the last byte received was data

0= Indicates that the last byte received was device address

Hardware clear at device address match. Hardware set by reception of slave byte.

P: Stop bit

1= Indicates that a Stop bit has been detected last

0= Stop bit was not detected last

Hardware set or clear when Start, Repeated Start or Stop detected.

Preliminary

DS70283B-page 191

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 17-2: I2CxSTAT: I2Cx STATUS REGISTER (CONTINUED)

bit 3

bit 2

bit 1

S: Start bit

1= Indicates that a Start (or Repeated Start) bit has been detected last

0= Start bit was not detected last

Hardware set or clear when Start, Repeated Start or Stop detected.

R_W: Read/Write Information bit (when operating as I²C slave)

1= Read – indicates data transfer is output from slave

0= Write – indicates data transfer is input to slave

Hardware set or clear after reception of I²C device address byte.

RBF: Receive Buffer Full Status bit

1= Receive complete, I2CxRCV is full

0= Receive not complete, I2CxRCV is empty

Hardware set when I2CxRCV is written with received byte. Hardware clear when software

reads I2CxRCV.

bit 0

TBF: Transmit Buffer Full Status bit

1= Transmit in progress, I2CxTRN is full

0= Transmit complete, I2CxTRN is empty

Hardware set when software writes I2CxTRN. Hardware clear at completion of data transmission.

DS70283B-page 192

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 17-3: I2CxMSK: I2Cx SLAVE MODE ADDRESS MASK REGISTER

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

AMSK9

AMSK8

bit 15

bit 8

R/W-0

AMSK7

AMSK6

AMSK5

AMSK4

AMSK3

AMSK2

AMSK1

AMSK0

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-10

bit 9-0

Unimplemented: Read as ‘0’

AMSKx: Mask for Address bit x Select bit

1= Enable masking for bit x of incoming message address; bit match not required in this position

0= Disable masking for bit x; bit match required in this position

Preliminary

DS70283B-page 193

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 194

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

• Hardware flow control option with UxCTS and

UxRTS pins

18.0 UNIVERSAL ASYNCHRONOUS

RECEIVER TRANSMITTER

(UART)

• Fully integrated Baud Rate Generator with 16-bit

prescaler

• Baud rates ranging from 1 Mbps to 15 Mbps at

16 MIPS

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

• 4-deep First-In First-Out (FIFO) Transmit Data

buffer

• 4-deep FIFO Receive Data buffer

• Parity, framing and buffer overrun error detection

• Support for 9-bit mode with Address Detect

(9th bit = 1)

• Transmit and Receive interrupts

• A separate interrupt for all UART error conditions

• Loopback mode for diagnostic support

• Support for sync and break characters

• Support for automatic baud rate detection

• IrDA encoder and decoder logic

The Universal Asynchronous Receiver Transmitter

(UART) module is one of the serial I/O modules avail-

able

in

the

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 device family. The UART is a full-

duplex asynchronous system that can communicate

with peripheral devices, such as personal computers,

LIN, RS-232 and RS-485 interfaces. The module also

supports a hardware flow control option with the

UxCTS and UxRTS pins and also includes an IrDA^®

encoder and decoder.

• 16x baud clock output for IrDA support

A simplified block diagram of the UART module is

shown in Figure 18-1. The UART module consists of

these key hardware elements:

• Baud Rate Generator

The primary features of the UART module are:

• Asynchronous Transmitter

• Asynchronous Receiver

• Full-Duplex, 8- or 9-bit Data Transmission through

the UxTX and UxRX pins

• Even, Odd or No Parity Options (for 8-bit data)

• One or two stop bits

FIGURE 18-1:

UART SIMPLIFIED BLOCK DIAGRAM

Baud Rate Generator

IrDA^®

BCLK

Hardware Flow Control

UART Receiver

UxRTS

UxCTS

UxRX

UxTX

UART Transmitter

Preliminary

DS70283B-page 195

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Equation 18-2 shows the formula for computation of

the baud rate with BRGH = 1.

18.1 UART Baud Rate Generator (BRG)

The UART module includes a dedicated 16-bit Baud

Rate Generator (BRG). The BRGx register controls the

period of a free-running 16-bit timer. Equation 18-1

shows the formula for computation of the baud rate

EQUATION 18-2: UART BAUD RATE WITH

BRGH = 1

with BRGH = 0.

FCY

Baud Rate =

4 • (BRGx + 1)

EQUATION 18-1: UART BAUD RATE WITH

BRGH = 0

FCY

4 • Baud Rate

– 1

BRGx =

FCY

Baud Rate =

16 • (BRGx + 1)

Note: FCY denotes the instruction cycle clock

frequency (FOSC/2).

FCY

– 1

BRGx =

16 • Baud Rate

The maximum baud rate (BRGH = 1) possible is FCY/4

(for BRGx = 0), and the minimum baud rate possible is

FCY/(4 * 65536).

Note: FCY denotes the instruction cycle clock

frequency (FOSC/2).

Writing a new value to the BRGx register causes the

BRG timer to be reset (cleared). This ensures the BRG

does not wait for a timer overflow before generating the

new baud rate.

Example 18-1 shows the calculation of the baud rate

error for the following conditions:

• FCY = 4 MHz

• Desired Baud Rate = 9600

The maximum baud rate (BRGH = 0) possible is

FCY/16 (for BRGx = 0), and the minimum baud rate

possible is FCY/(16 * 65536).

EXAMPLE 18-1:

BAUD RATE ERROR CALCULATION (BRGH = 0)

Desired Baud Rate

=

FCY/(16 (BRGx + 1))

Solving for BRGx Value:

BRGx

=

((FCY/Desired Baud Rate)/16) – 1

((4000000/9600)/16) – 1

25

Calculated Baud Rate

=

4000000/(16 (25 + 1))

9615

Error

=

(Calculated Baud Rate – Desired Baud Rate)

Desired Baud Rate

=

(9615 – 9600)/9600

0.16%

DS70283B-page 196

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

18.2 Transmitting in 8-bit Data Mode

18.5 Receiving in 8-bit or 9-bit Data

Mode

1. Set up the UART:

a) Write appropriate values for data, parity and

Stop bits.

1. Set up the UART (as described in Section 18.2

“Transmitting in 8-bit Data Mode”).

b) Write appropriate baud rate value to the

BRGx register.

2. Enable the UART.

A receive interrupt will be generated when one

or more data characters have been received as

per interrupt control bits, URXISEL<1:0>.

c) Set up transmit and receive interrupt enable

and priority bits.

2. Enable the UART.

3. Read the OERR bit to determine if an overrun

error has occurred. The OERR bit must be reset

in software.

3. Set the UTXEN bit (causes a transmit interrupt).

4. Write data byte to lower byte of UxTXREG word.

The value will be immediately transferred to the

Transmit Shift Register (TSR) and the serial bit

stream will start shifting out with the next rising

edge of the baud clock.

4. Read UxRXREG.

The act of reading the UxRXREG character will move

the next character to the top of the receive FIFO,

including a new set of PERR and FERR values.

Alternately, the data byte can be transferred

while UTXEN = 0, and then the user application

can set UTXEN. This causes the serial bit

stream to begin immediately, because the baud

clock starts from a cleared state.

18.6 Flow Control Using UxCTS and

UxRTS Pins

UARTx Clear to Send (UxCTS) and Request to Send

(UxRTS) are the two hardware controlled active-low

pins associated with the UART module. The UEN<1:0>

bits in the UxMODE register configures these pins.

A transmit interrupt will be generated as per the

interrupt control bits, UTXISEL<1:0>.

These two pins allow the UART to operate in Simplex

and Flow Control modes. They are implemented to

control the transmission and the reception between the

Data Terminal Equipment (DTE).

18.3 Transmitting in 9-bit Data Mode

1. Set up the UART (as described in Section 18.2

“Transmitting in 8-bit Data Mode”).

2. Enable the UART.

18.7 Infrared Support

3. Set the UTXEN bit (causes a transmit interrupt).

4. Write UxTXREG as a 16-bit value only.

The UART module provides two types of infrared UART

support:

A word write to UxTXREG triggers the transfer

of the 9-bit data to the TSR. The serial bit stream

will start shifting out with the first rising edge of

the baud clock.

• IrDA clock output to support external IrDA

encoder and decoder device (legacy module

support)

• Full implementation of the IrDA encoder and

decoder.

A transmit interrupt will be generated as per the

setting of control bits, UTXISEL<1:0>.

18.7.1

EXTERNAL IrDA SUPPORT – IrDA

CLOCK OUTPUT

18.4 Break and Sync Transmit

Sequence

To support external IrDA encoder and decoder devices,

the BCLK pin (same as the UxRTS pin) can be

configured to generate the 16x baud clock. With

UEN<1:0> = 11, the BCLK pin will output the 16x baud

clock if the UART module is enabled. The pin can be

used to support the IrDA codec chip.

The following sequence will send a message frame

header made up of a Break, followed by an auto-baud

Sync byte.

1. Configure the UART for the desired mode.

2. Set UTXEN and UTXBRK, which sets up the

Break character.

18.7.2

BUILT-IN IrDA ENCODER AND

DECODER

3. Load the UxTXREG register with a dummy

character to initiate transmission (value is

ignored).

The UART module includes full implementation of the

IrDA encoder and decoder. The built-in IrDA encoder

and decoder functionality is enabled using the IREN bit

(UxMODE<12>). When enabled (IREN = 1), the

receive pin (UxRX) acts as the input from the infrared

receiver. The transmit pin (UxTX) acts as the output to

the infrared transmitter.

Write 0x55 to UxTXREG, which loads the Sync charac-

ter into the transmit FIFO. After the Break has been

sent, the UTXBRK bit is reset by hardware. The Sync

character now transmits.

Preliminary

DS70283B-page 197

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 18-1: UxMODE: UARTx MODE REGISTER

R/W-0

U-0

—

R/W-0

USIDL

R/W-0

IREN⁽¹⁾

R/W-0

U-0

—

R/W-0

UARTEN

RTSMD

UEN<1:0>

bit 15

bit 8

R/W-0 HC

WAKE

R/W-0

R/W-0 HC

ABAUD

R/W-0

BRGH

R/W-0

LPBACK

URXINV

PDSEL<1:0>

STSEL

bit 7

bit 0

Legend:

HC = Hardware cleared

W = Writable bit

R = Readable bit

-n = Value at POR

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

‘1’ = Bit is set

bit 15

UARTEN: UARTx Enable bit

1= UARTx is enabled; all UARTx pins are controlled by UARTx as defined by UEN<1:0>

0= UARTx is disabled; all UARTx pins are controlled by port latches; UARTx power consumption

minimal

bit 14

bit 13

Unimplemented: Read as ‘0’

USIDL: Stop in Idle Mode bit

1= Discontinue module operation when device enters Idle mode

0= Continue module operation in Idle mode

bit 12

bit 11

IREN: IrDA Encoder and Decoder Enable bit⁽¹⁾

1= IrDA encoder and decoder enabled

0= IrDA encoder and decoder disabled

RTSMD: Mode Selection for UxRTS Pin bit

1= UxRTS pin in Simplex mode

0= UxRTS pin in Flow Control mode

bit 10

Unimplemented: Read as ‘0’

UEN<1:0>: UARTx Enable bits

bit 9-8

11= UxTX, UxRX and BCLK pins are enabled and used; UxCTS pin controlled by port latches

10= UxTX, UxRX, UxCTS and UxRTS pins are enabled and used

01= UxTX, UxRX and UxRTS pins are enabled and used; UxCTS pin controlled by port latches

00= UxTX and UxRX pins are enabled and used; UxCTS and UxRTS/BCLK pins controlled by

port latches

bit 7

WAKE: Wake-up on Start bit Detect During Sleep Mode Enable bit

1= UARTx will continue to sample the UxRX pin; interrupt generated on falling edge; bit cleared

in hardware on following rising edge

0= No wake-up enabled

bit 6

bit 5

LPBACK: UARTx Loopback Mode Select bit

1= Enable Loopback mode

0= Loopback mode is disabled

ABAUD: Auto-Baud Enable bit

1= Enable baud rate measurement on the next character – requires reception of a Sync field (55h)

before other data; cleared in hardware upon completion

0= Baud rate measurement disabled or completed

bit 4

URXINV: Receive Polarity Inversion bit

1= UxRX Idle state is ‘0’

0= UxRX Idle state is ‘1’

Note 1: This feature is only available for the 16x BRG mode (BRGH = 0).

DS70283B-page 198

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 18-1: UxMODE: UARTx MODE REGISTER (CONTINUED)

bit 3

BRGH: High Baud Rate Enable bit

1= BRG generates 4 clocks per bit period (4x baud clock, High-Speed mode)

0= BRG generates 16 clocks per bit period (16x baud clock, Standard mode)

bit 2-1

PDSEL<1:0>: Parity and Data Selection bits

11= 9-bit data, no parity

10= 8-bit data, odd parity

01= 8-bit data, even parity

00= 8-bit data, no parity

bit 0

STSEL: Stop Bit Selection bit

1= Two Stop bits

0= One Stop bit

Note 1: This feature is only available for the 16x BRG mode (BRGH = 0).

Preliminary

DS70283B-page 199

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 18-2: UxSTA: UARTx STATUS AND CONTROL REGISTER

R/W-0

UTXINV⁽¹⁾

R/W-0

U-0

—

R/W-0 HC

UTXBRK

R/W-0

R-0

R-1

UTXISEL1

UTXISEL0

UTXEN

UTXBF

TRMT

bit 15

bit 8

R/W-0

R-1

R-0

R/C-0

R-0

URXISEL<1:0>

ADDEN

RIDLE

PERR

FERR

OERR

URXDA

bit 7

bit 0

Legend:

HC = Hardware cleared

W = Writable bit

R = Readable bit

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

-n = Value at POR

‘1’ = Bit is set

bit 15,13

UTXISEL<1:0>: Transmission Interrupt Mode Selection bits

11= Reserved; do not use

10= Interrupt when a character is transferred to the Transmit Shift Register, and as a result, the

transmit buffer becomes empty

01= Interrupt when the last character is shifted out of the Transmit Shift Register; all transmit

operations are completed

00= Interrupt when a character is transferred to the Transmit Shift Register (this implies there is

at least one character open in the transmit buffer)

®

bit 14

UTXINV: IrDA Encoder Transmit Polarity Inversion bit⁽¹⁾

1= IrDA encoded, UxTX Idle state is ‘1’

0= IrDA encoded, UxTX Idle state is ‘0’

bit 12

bit 11

Unimplemented: Read as ‘0’

UTXBRK: Transmit Break bit

1= Send Sync Break on next transmission – Start bit, followed by twelve ‘0’ bits, followed by Stop bit;

cleared by hardware upon completion

0= Sync Break transmission disabled or completed

bit 10

UTXEN: Transmit Enable bit

1= Transmit enabled, UxTX pin controlled by UARTx

0= Transmit disabled, any pending transmission is aborted and buffer is reset. UxTX pin controlled

by port.

bit 9

UTXBF: Transmit Buffer Full Status bit (read-only)

1= Transmit buffer is full

0= Transmit buffer is not full, at least one more character can be written

bit 8

TRMT: Transmit Shift Register Empty bit (read-only)

1= Transmit Shift Register is empty and transmit buffer is empty (the last transmission has completed)

0= Transmit Shift Register is not empty, a transmission is in progress or queued

bit 7-6

URXISEL<1:0>: Receive Interrupt Mode Selection bits

11= Interrupt is set on UxRSR transfer making the receive buffer full (i.e., has 4 data characters)

10= Interrupt is set on UxRSR transfer making the receive buffer 3/4 full (i.e., has 3 data characters)

0x= Interrupt is set when any character is received and transferred from the UxRSR to the receive

buffer. Receive buffer has one or more characters.

bit 5

ADDEN: Address Character Detect bit (bit 8 of received data = 1)

1= Address Detect mode enabled. If 9-bit mode is not selected, this does not take effect.

0= Address Detect mode disabled

Note 1: Value of bit only affects the transmit properties of the module when the IrDA encoder is enabled

(IREN = 1).

DS70283B-page 200

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 18-2: UxSTA: UARTx STATUS AND CONTROL REGISTER (CONTINUED)

bit 4

bit 3

bit 2

RIDLE: Receiver Idle bit (read-only)

1= Receiver is Idle

0= Receiver is active

PERR: Parity Error Status bit (read-only)

1= Parity error has been detected for the current character (character at the top of the receive FIFO)

0= Parity error has not been detected

FERR: Framing Error Status bit (read-only)

1= Framing error has been detected for the current character (character at the top of the receive

FIFO)

0= Framing error has not been detected

bit 1

bit 0

OERR: Receive Buffer Overrun Error Status bit (read/clear only)

1= Receive buffer has overflowed

0= Receive buffer has not overflowed. Clearing a previously set OERR bit (1→ 0transition) will reset

the receiver buffer and the UxRSR to the empty state.

URXDA: Receive Buffer Data Available bit (read-only)

1= Receive buffer has data, at least one more character can be read

0= Receive buffer is empty

Note 1: Value of bit only affects the transmit properties of the module when the IrDA encoder is enabled

(IREN = 1).

Preliminary

DS70283B-page 201

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 202

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Depending on the particular device pinout, the ADC

19.0 10-BIT/12-BIT ANALOG-TO-

can have up to 9 analog input pins, designated AN0

through AN8. In addition, there are two analog input

pins for external voltage reference connections. These

voltage reference inputs can be shared with other

analog input pins.

DIGITAL CONVERTER (ADC)

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

The actual number of analog input pins and external

voltage reference input configuration will depend on the

specific device. Refer to the device data sheet for

further details.

A block diagram of the ADC is shown in Figure 19-1.

19.2 ADC Initialization

The

dsPIC33FJ32MC202/204

and

To configure the ADC module:

dsPIC33FJ16MC304 devices have up to 9 Analog-to-

Digital Converter (ADC) module input channels.

1. Select

port

pins

as

analog

inputs

(AD1PCFGH<15:0> or AD1PCFGL<15:0>).

The AD12B bit (AD1CON1<10>) allows each of the

ADC modules to be configured as either a 10-bit, 4

sample-and-hold ADC (default configuration), or a

12-bit, 1 sample-and-hold ADC.

2. Select voltage reference source to match

expected

range

on

analog

inputs

(AD1CON2<15:13>).

3. Select the analog conversion clock to match the

desired data rate with the processor clock

(AD1CON3<5:0>).

Note:

The ADC module must be disabled before

the AD12B bit can be modified.

4. Determine how many sample-and-hold chan-

nels will be used (AD1CON2<9:8> and

AD1PCFGH<15:0> or AD1PCFGL<15:0>).

19.1 Key Features

The 10-bit ADC configuration has the following key

features:

5. Select the appropriate sample/conversion

sequence

AD1CON3<12:8>).

(AD1CON1<7:5>

and

• Successive Approximation (SAR) conversion

• Conversion speeds of up to 1.1 Msps

• Up to 9 analog input pins

6. Select the way conversion results are presented

in the buffer (AD1CON1<9:8>).

• External voltage reference input pins

7. Turn on the ADC module (AD1CON1<15>).

8. Configure ADC interrupt (if required):

a) Clear the AD1IF bit.

• Simultaneous sampling of up to four analog input

pins

• Automatic Channel Scan mode

• Selectable conversion trigger source

• Selectable Buffer Fill modes

b) Select the ADC interrupt priority.

• Four result alignment options (signed/unsigned,

fractional/integer)

• Operation during CPU Sleep and Idle modes

• 16-word conversion result buffer

The 12-bit ADC configuration supports all the above

features, except:

• In the 12-bit configuration, conversion speeds of

up to 500 ksps are supported

• There is only 1 sample-and-hold amplifier in the

12-bit configuration, so simultaneous sampling of

multiple channels is not supported.

Preliminary

DS70283B-page 203

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 19-1:

ADC1 MODULE BLOCK DIAGRAM FOR dsPIC33FJ16MC304 AND

dsPIC33FJ32MC204 DEVICES

AVDD

AVSS

VREF+⁽¹⁾

VREF-⁽¹⁾

AN0

AN3

AN0

AN1

AN2

+

CH1⁽²⁾

CH2⁽²⁾

CH3⁽²⁾

S/H

ADC1

AN6

-

VREF-

Conversion Logic

Conversion

Result

AN1

AN4

+

S/H

AN7

-

16-bit

ADC Output

Buffer

VREF-

AN2

AN5

+

S/H

AN8

CH1,CH2,

CH3,CH0

-

Sample/Sequence

Control

VREF-

Sample

00000

00001

00010

00011

Input

Switches

Input MUX

Control

AN3

00100

00101

00110

00111

01000

AN4

AN5

AN6

AN7

AN8

+

CH0

VREF-

AN1

S/H

-

Note 1: VREF+, VREF- inputs may be multiplexed with other analog inputs.

2: Channels 1, 2 and 3 are not applicable for the 12-bit mode of operation.

DS70283B-page 204

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 19-2:

ADC1 MODULE BLOCK DIAGRAM FOR dsPIC33FJ32MC202 DEVICES

AVDD

AVSS

VREF+⁽¹⁾

VREF-⁽¹⁾

AN0

AN3

AN0

AN1

AN2

+

CH1⁽²⁾

CH2⁽²⁾

CH3⁽²⁾

S/H

ADC1

-

VREF-

Conversion Logic

Conversion

Result

AN1

AN4

+

S/H

-

16-bit

ADC Output

Buffer

VREF-

AN2

AN5

+

S/H

CH1,CH2,

CH3,CH0

-

Sample/Sequence

Control

VREF-

Sample

00000

00001

00010

00011

Input

Switches

Input MUX

Control

AN3

00100

00101

AN4

AN5

+

CH0

VREF-

AN1

S/H

-

Note 1: VREF+, VREF- inputs may be multiplexed with other analog inputs.

2: Channels 1, 2 and 3 are not applicable for the 12-bit mode of operation.

Preliminary

DS70283B-page 205

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

EQUATION 19-1: ADC CONVERSION CLOCK PERIOD

TCY(ADCS + 1)

TAD =

TAD

TCY

– 1

ADCS =

FIGURE 19-3:

ADC TRANSFER FUNCTION (10-BIT EXAMPLE)

Output Code

11 1111 1111 (= 1023)

11 1111 1110 (= 1022)

10 0000 0011 (= 515)

10 0000 0010 (= 514)

10 0000 0001 (= 513)

10 0000 0000 (= 512)

01 1111 1111 (= 511)

01 1111 1110 (= 510)

01 1111 1101 (= 509)

00 0000 0001 (= 1)

00 0000 0000 (= 0)

VREFL

VREFH

VREFH – VREFL

1024

512 * (VREFH – VREFL)

1024

1023 * (VREFH – VREFL)

1024

VREFL +

(VINH – VINL)

FIGURE 19-4:

ADC CONVERSION CLOCK PERIOD BLOCK DIAGRAM

AD1CON3<15>

ADC Internal

RC Clock

0

1

TAD

AD1CON3<5:0>

6

ADC Conversion

Clock Multiplier

TCY

(1)

X2

TOSC

1, 2, 3, 4, 5,..., 64

Note:

Refer to Figure 7-2 for the derivation of FOSC when the PLL is enabled. If the PLL is not used, FOSC is equal

to the clock frequency. TOSC = 1/FOSC.

DS70283B-page 206

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-1: AD1CON1: ADC1 CONTROL REGISTER 1

R/W-0

ADON

U-0

—

R/W-0

U-0

—

U-0

—

R/W-0

ADSIDL

AD12B

FORM<1:0>

bit 15

bit 8

R/W-0

U-0

—

R/W-0

ASAM

R/W-0

HC,HS

R/C-0

HC, HS

SSRC<2:0>

SIMSAM

SAMP

DONE

bit 7

bit 0

Legend:

HC = Cleared by hardware

W = Writable bit

HS = Set by hardware

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

R = Readable bit

-n = Value at POR

‘1’ = Bit is set

bit 15

ADON: ADC Operating Mode bit

1= ADC module is operating

0= ADC is off

bit 14

bit 13

Unimplemented: Read as ‘0’

ADSIDL: Stop in Idle Mode bit

1= Discontinue module operation when device enters Idle mode

0= Continue module operation in Idle mode

bit 12-11

bit 10

Unimplemented: Read as ‘0’

AD12B: 10-bit or 12-bit Operation Mode bit

1= 12-bit, 1-channel ADC operation

0= 10-bit, 4-channel ADC operation

bit 9-8

FORM<1:0>: Data Output Format bits

For 10-bit operation:

11= Signed fractional (DOUT = sddd dddd dd00 0000, where s= .NOT.d<9>)

10= Fractional (DOUT = dddd dddd dd00 0000)

01= Signed integer (DOUT = ssss sssd dddd dddd, where s= .NOT.d<9>)

00= Integer (DOUT = 0000 00dd dddd dddd)

For 12-bit operation:

11= Signed fractional (DOUT = sddd dddd dddd 0000, where s= .NOT.d<11>)

10= Fractional (DOUT = dddd dddd dddd 0000)

01= Signed Integer (DOUT = ssss sddd dddd dddd, where s= .NOT.d<11>)

00= Integer (DOUT = 0000 dddd dddd dddd)

bit 7-5

SSRC<2:0>: Sample Clock Source Select bits

111= Internal counter ends sampling and starts conversion (auto-convert)

110= Reserved

101= Motor Control PWM2 interval ends sampling and starts conversion

100= Reserved

011= Motor Control PWM1 interval ends sampling and starts conversion

010= GP timer 3 compare ends sampling and starts conversion

001= Active transition on INT0 pin ends sampling and starts conversion

000= Clearing sample bit ends sampling and starts conversion

bit 4

bit 3

Unimplemented: Read as ‘0’

SIMSAM: Simultaneous Sample Select bit (applicable only when CHPS<1:0> = 01or 1x)

When AD12B = 1, SIMSAM is: U-0, Unimplemented, Read as ‘0’

1= Samples CH0, CH1, CH2, CH3 simultaneously (when CHPS<1:0> = 1x); or

Samples CH0 and CH1 simultaneously (when CHPS<1:0> = 01)

0= Samples multiple channels individually in sequence

Preliminary

DS70283B-page 207

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-1: AD1CON1: ADC1 CONTROL REGISTER 1 (CONTINUED)

bit 2

bit 1

ASAM: ADC Sample Auto-Start bit

1= Sampling begins immediately after last conversion. SAMP bit is auto-set.

0= Sampling begins when SAMP bit is set

SAMP: ADC Sample Enable bit

1= ADC sample-and-hold amplifiers are sampling

0= ADC sample-and-hold amplifiers are holding

If ASAM = 0, software can write ‘1’ to begin sampling. Automatically set by hardware if ASAM = 1.

If SSRC = 000, software can write ‘0’ to end sampling and start conversion. If SSRC ≠ 000,

automatically cleared by hardware to end sampling and start conversion.

bit 0

DONE: ADC Conversion Status bit

1= ADC conversion cycle is completed

0= ADC conversion not started or in progress

Automatically set by hardware when ADC conversion is complete. Software can write ‘0’ to clear

DONE status (software not allowed to write ‘1’). Clearing this bit will NOT affect any operation in

progress. Automatically cleared by hardware at start of a new conversion.

DS70283B-page 208

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-2: AD1CON2: ADC1 CONTROL REGISTER 2

R/W-0

U-0

—

U-0

—

R/W-0

VCFG<2:0>

CSCNA

CHPS<1:0>

bit 15

bit 8

R-0

U-0

—

R/W-0

BUFM

R/W-0

ALTS

BUFS

SMPI<3:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-13

VCFG<2:0>: Converter Voltage Reference Configuration bits

ADREF+

ADREF-

000

001

010

011

1xx

AVDD

External VREF+

AVDD

AVSS

External VREF-

AVSS

External VREF+

AVDD

bit 12-11

bit 10

Unimplemented: Read as ‘0’

CSCNA: Scan Input Selections for CH0+ during Sample A bit

1= Scan inputs

0= Do not scan inputs

bit 9-8

bit 7

CHPS<1:0>: Select Channels Utilized bits

When AD12B = 1, CHPS<1:0> is: U-0, Unimplemented, Read as ‘0’

1x=Converts CH0, CH1, CH2 and CH3

01=Converts CH0 and CH1

00=Converts CH0

BUFS: Buffer Fill Status bit (valid only when BUFM = 1)

1= ADC is currently filling second half of buffer, user should access data in the first half

0= ADC is currently filling first half of buffer, user application should access data in the second half

bit 6

Unimplemented: Read as ‘0’

bit 5-2

SMPI<3:0>: Sample/Convert Sequences Per Interrupt Selection bits

1111=Interrupts at the completion of conversion for each 16th sample/convert sequence

1110=Interrupts at the completion of conversion for each 15th sample/convert sequence

• • •

0001=Interrupts at the completion of conversion for each 2nd sample/convert sequence

0000=Interrupts at the completion of conversion for each sample/convert sequence

bit 1

bit 0

BUFM: Buffer Fill Mode Select bit

1= Starts filling first half of buffer on first interrupt and the second half of buffer on next interrupt

0= Always starts filling buffer from the beginning

ALTS: Alternate Input Sample Mode Select bit

1= Uses channel input selects for Sample A on first sample and Sample B on next sample

0= Always uses channel input selects for Sample A

Preliminary

DS70283B-page 209

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-3: AD1CON3: ADC1 CONTROL REGISTER 3

R/W-0

ADRC

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

SAMC<4:0>

bit 15

U-0

—

U-0

—

R/W-0

ADCS<5:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

ADRC: ADC Conversion Clock Source bit

1= ADC internal RC clock

0= Clock derived from system clock

bit 14-13

bit 12-8

Unimplemented: Read as ‘0’

SAMC<4:0>: Auto Sample Time bits

11111= 31 TAD

• • •

00001= 1 TAD

00000= 0 TAD

bit 7-6

bit 5-0

Unimplemented: Read as ‘0’

ADCS<5:0>: ADC Conversion Clock Select bits

111111= TCY ·(ADCS<7:0> + 1) = 64 ·TCY = TAD

• • •

000010= TCY ·(ADCS<7:0> + 1) = 3 ·TCY = TAD

000001= TCY ·(ADCS<7:0> + 1) = 2 ·TCY = TAD

000000= TCY ·(ADCS<7:0> + 1) = 1 ·TCY = TAD

DS70283B-page 210

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-4: AD1CHS123: ADC1 INPUT CHANNEL 1, 2, 3 SELECT REGISTER

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

CH123NB<1:0>

CH123SB

bit 15

bit 8

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

R/W-0

CH123NA<1:0>

CH123SA

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-11

bit 10-9

Unimplemented: Read as ‘0’

CH123NB<1:0>: Channel 1, 2, 3 Negative Input Select for Sample B bits

dsPIC33FJ32MC202 devices only:

If AD12B = 1:

11= Reserved

10= Reserved

01= Reserved

00= Reserved

If AD12B = 0:

11= Reserved

10= Reserved

01= CH1, CH2, CH3 negative input is VREF-

00= CH1, CH2, CH3 negative input is VREF-

dsPIC33FJ32MC204 and dsPIC33FJ16MC304 devices only:

If AD12B = 1:

11= Reserved

10= Reserved

01= Reserved

00= Reserved

If AD12B = 0:

11= Reserved

10= CH1 negative input is AN6, CH2 negative input is AN7, CH3 negative input is AN8

01= CH1, CH2, CH3 negative input is VREF-

00= CH1, CH2, CH3 negative input is VREF-

bit 8

CH123SB: Channel 1, 2, 3 Positive Input Select for Sample B bit

If AD12B = 1:

1= Reserved

0= Reserved

If AD12B = 0:

1= CH1 positive input is AN3, CH2 positive input is AN4, CH3 positive input is AN5

0= CH1 positive input is AN0, CH2 positive input is AN1, CH3 positive input is AN2

bit 7-3

Unimplemented: Read as ‘0’

Preliminary

DS70283B-page 211

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-4: AD1CHS123: ADC1 INPUT CHANNEL 1, 2, 3 SELECT REGISTER (CONTINUED)

bit 2-1

CH123NA<1:0>: Channel 1, 2, 3 Negative Input Select for Sample A bits

dsPIC33FJ32MC202 devices only:

If AD12B = 1:

11= Reserved

10= Reserved

01= Reserved

00= Reserved

If AD12B = 0:

11= Reserved

10= Reserved

01= CH1, CH2, CH3 negative input is VREF-

00= CH1, CH2, CH3 negative input is VREF-

dsPIC33FJ32MC204 and dsPIC33FJ16MC304 devices only:

If AD12B = 1:

11= Reserved

10= Reserved

01= Reserved

00= Reserved

If AD12B = 0:

11= Reserved

10= CH1 negative input is AN6, CH2 negative input is AN7, CH3 negative input is AN8

01= CH1, CH2, CH3 negative input is VREF-

00= CH1, CH2, CH3 negative input is VREF-

bit 0

CH123SA: Channel 1, 2, 3 Positive Input Select for Sample A bit

If AD12B = 1:

1= Reserved

0= Reserved

If AD12B = 0:

1= CH1 positive input is AN3, CH2 positive input is AN4, CH3 positive input is AN5

0= CH1 positive input is AN0, CH2 positive input is AN1, CH3 positive input is AN2

DS70283B-page 212

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-5: AD1CHS0: ADC1 INPUT CHANNEL 0 SELECT REGISTER

R/W-0

U-0

—

U-0

—

R/W-0

bit 8

R/W-0

CH0NB

CH0SB<4:0>

bit 15

R/W-0

U-0

—

U-0

—

R/W-0

CH0NA

CH0SA<4:0>

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15

CH0NB: Channel 0 Negative Input Select for Sample B bit

1= Channel 0 negative input is AN1

0= Channel 0 negative input is VREF-

bit 14-13

bit 12-8

Unimplemented: Read as ‘0’

CH0SB<4:0>: Channel 0 Positive Input Select for Sample B bits

dsPIC33FJ32MC204 and dsPIC33FJ16MC304 devices only:

01000= Channel 0 positive input is AN8

•

00010= Channel 0 positive input is AN2

00001= Channel 0 positive input is AN1

00000= Channel 0 positive input is AN0

dsPIC33FJ32MC202 devices only:

00101= Channel 0 positive input is AN5

•

00010= Channel 0 positive input is AN2

00001= Channel 0 positive input is AN1

00000= Channel 0 positive input is AN0.

bit 7

CH0NA: Channel 0 Negative Input Select for Sample A bit

1= Channel 0 negative input is AN1

0= Channel 0 negative input is VREF-

bit 6-5

Unimplemented: Read as ‘0’

Preliminary

DS70283B-page 213

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-5: AD1CHS0: ADC1 INPUT CHANNEL 0 SELECT REGISTER (CONTINUED)

bit 4-0

CH0SA<4:0>: Channel 0 Positive Input Select for Sample A bits

dsPIC33FJ32MC204 and dsPIC33FJ16MC304 devices only:

01000= Channel 0 positive input is AN8

•

00010= Channel 0 positive input is AN2

00001= Channel 0 positive input is AN1

00000= Channel 0 positive input is AN0

dsPIC33FJ32MC202 devices only:

00101= Channel 0 positive input is AN5

•

00010= Channel 0 positive input is AN2

00001= Channel 0 positive input is AN1

00000= Channel 0 positive input is AN0

DS70283B-page 214

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

REGISTER 19-6: AD1CSSL: ADC1 INPUT SCAN SELECT REGISTER LOW⁽¹⁾

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

CSS8

bit 15

bit 8

U-0

R/W-0

CSS5

R/W-0

CSS4

R/W-0

CSS3

R/W-0

CSS2

R/W-0

CSS1

R/W-0

CSS0

CSS7

CSS6

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-6

bit 5-0

Unimplemented: Read as ‘0’

CSS<8:0>: ADC Input Scan Selection bits

1= Select ANx for input scan

0= Skip ANx for input scan

Note 1: On devices without nine analog inputs, all AD1CSSL bits can be selected. However, inputs selected for

scan without a corresponding input on device will convert ADREF-.

REGISTER 19-7: AD1PCFGL: ADC1 PORT CONFIGURATION REGISTER LOW⁽¹⁾

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

—

U-0

PCFG8

bit 15

bit 8

U-0

R/W-0

PCFG7

PCFG6

PCFG5

PCFG4

PCFG3

PCFG2

PCFG1

PCFG0

bit 7

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

bit 15-6

bit 5-0

Unimplemented: Read as ‘0’

PCFG<8:0>: ADC Port Configuration Control bits

1= Port pin in Digital mode, port read input enabled, ADC input multiplexer connected to AVSS

0= Port pin in Analog mode, port read input disabled, ADC samples pin voltage

Note 1: On devices without nine analog inputs, all PCFG bits are R/W. However, PCFG bits are ignored on ports

without a corresponding input on device.

Preliminary

DS70283B-page 215

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 216

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

20.1 Configuration Bits

20.0 SPECIAL FEATURES

The Configuration bits can be programmed (read as

‘0’), or left unprogrammed (read as ‘1’), to select vari-

ous device configurations. These bits are mapped

starting at program memory location 0xF80000.

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

The individual Configuration bit descriptions for the

FBS, FGS, FOSCSEL, FOSC, FWDT, FPOR and FICD

Configuration registers are shown in Table 20-2.

Note that address 0xF80000 is beyond the user program

memory space. It belongs to the configuration memory

space (0x800000-0xFFFFFF), which can only be

accessed using table reads and table writes.

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices include several features intended to maximize

application flexibility and reliability, and minimize cost

through elimination of external components. These are:

The upper byte of all device Configuration registers

should always be ‘1111 1111’. This makes them

appear to be NOPinstructions in the remote event that

their locations are ever executed by accident. Since

Configuration bits are not implemented in the

corresponding locations, writing ‘1’s to these locations

has no effect on device operation.

• Flexible configuration

• Watchdog Timer (WDT)

• Code Protection and CodeGuard™ Security

• JTAG Boundary Scan Interface

• In-Circuit Serial Programming™ (ICSP™)

• In-Circuit emulation

To prevent inadvertent configuration changes during

code execution, all programmable Configuration bits

are write-once. After a bit is initially programmed during

a power cycle, it cannot be written to again. Changing

a device configuration requires that power to the device

be cycled.

The Device Configuration register map is shown in

Table 20-1.

TABLE 20-1: DEVICE CONFIGURATION REGISTER MAP

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0xF80000 FBS

—

BSS<2:0>

BWRP

0xF80002 RESERVED

0xF80004 FGS

Reserved⁽¹⁾

—

GSS<1:0>

FNOSC<2:0>

GWRP

0xF80006 FOSCSEL

0xF80008 FOSC

0xF8000A FWDT

0xF8000C FPOR

0xF8000E RESERVED

0xF80010 FUID0

0xF80012 FUID1

0xF80014 FUID2

0xF80016 FUID3

IESO

FCKSM<1:0>

FWDTEN WINDIS

PWMPIN HPOL

IOL1WAY

—

OSCIOFNC POSCMD<1:0>

WDTPOST<3:0>

WDTPRE

ALTI2C

Reserved⁽¹⁾

LPOL

FPWRT<2:0>

User Unit ID Byte 0

User Unit ID Byte 1

User Unit ID Byte 2

User Unit ID Byte 3

Note 1: These reserved bits read as ‘1’ and must be programmed as ‘1’.

Preliminary

DS70283B-page 217

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 20-2: DSPIC33F CONFIGURATION BITS DESCRIPTION

Bit Field

Register

Description

BWRP

FBS

Boot Segment Program Flash Write Protection

1= Boot segment can be written

0= Boot segment is write-protected

BSS<2:0>

GSS<1:0>

FBS

FGS

dsPIC33FJ32MC202 and dsPIC33FJ32MC204 Devices Only

Boot Segment Program Flash Code Protection Size

X11= No Boot program Flash segment

Boot space is 768 Instruction Words (except interrupt vectors)

110= Standard security; boot program Flash segment ends at

0x0007FE

010= High security; boot program Flash segment ends at 0x0007FE

Boot space is 3840 Instruction Words (except interrupt vectors)

101= Standard security; boot program Flash segment, ends at

0x001FFE

001= High security; boot program Flash segment ends at 0x001FFE

Boot space is 7936 Instruction Words (except interrupt vectors)

100= Standard security; boot program Flash segment ends at

0x003FFE

000= High security; boot program Flash segment ends at 0x003FFE

dsPIC33FJ16MC304 Devices Only

Boot Segment Program Flash Code Protection Size

X11= No Boot program Flash segment

Boot space is 768 Instruction Words (except interrupt vectors)

110= Standard security; boot program Flash segment ends at

0x0007FE

010= High security; boot program Flash segment ends at 0x0007FE

Boot space is 3840 Instruction Words (except interrupt vectors)

101= Standard security; boot program Flash segment, ends at

0x001FFE

001= High security; boot program Flash segment ends at 0x001FFE

Boot space is 5376 Instruction Words (except interrupt vectors)

100= Standard security; boot program Flash segment ends at

0x002BFE

000= High security; boot program Flash segment ends at 0x002BFE

General Segment Code-Protect bit

11= User program memory is not code-protected

10= Standard security

0x= High security

GWRP

IESO

FGS

General Segment Write-Protect bit

1= User program memory is not write-protected

0= User program memory is write-protected

FOSCSEL

Two-speed Oscillator Start-up Enable bit

1= Start-up device with FRC, then automatically switch to the

user-selected oscillator source when ready

0= Start-up device with user-selected oscillator source

DS70283B-page 218

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 20-2: DSPIC33F CONFIGURATION BITS DESCRIPTION (CONTINUED)

Bit Field

Register

Description

FNOSC<2:0>

FOSCSEL

Initial Oscillator Source Selection bits

111= Internal Fast RC (FRC) oscillator with postscaler

110= Internal Fast RC (FRC) oscillator with divide-by-16

101= LPRC oscillator

100= Secondary (LP) oscillator

011= Primary (XT, HS, EC) oscillator with PLL

010= Primary (XT, HS, EC) oscillator

001= Internal Fast RC (FRC) oscillator with PLL

000= FRC oscillator

FCKSM<1:0>

FOSC

Clock Switching Mode bits

1x= Clock switching is disabled, Fail-Safe Clock Monitor is disabled

01= Clock switching is enabled, Fail-Safe Clock Monitor is disabled

00= Clock switching is enabled, Fail-Safe Clock Monitor is enabled

IOL1WAY

OSCIOFNC

FOSC

Peripheral pin select configuration

1= Allow only one reconfiguration

0= Allow multiple reconfigurations

OSC2 Pin Function bit (except in XT and HS modes)

1= OSC2 is clock output

0= OSC2 is general purpose digital I/O pin

POSCMD<1:0>

Primary Oscillator Mode Select bits

11= Primary oscillator disabled

10= HS Crystal Oscillator mode

01= XT Crystal Oscillator mode

00= EC (External Clock) mode

FWDTEN

FWDT

Watchdog Timer Enable bit

1= Watchdog Timer always enabled (LPRC oscillator cannot be disabled.

Clearing the SWDTEN bit in the RCON register will have no effect.)

0= Watchdog Timer enabled/disabled by user software (LPRC can be

disabled by clearing the SWDTEN bit in the RCON register)

WINDIS

WDTPRE

FWDT

Watchdog Timer Window Enable bit

1= Watchdog Timer in Non-Window mode

0= Watchdog Timer in Window mode

Watchdog Timer Prescaler bit

1= 1:128

0= 1:32

WDTPOST<3:0>

Watchdog Timer Postscaler bits

1111= 1:32,768

1110= 1:16,384

.

0001= 1:2

0000= 1:1

PWMPIN

FPOR

Motor Control PWM Module Pin Mode bit

1= PWM module pins controlled by PORT register at device Reset

(tri-stated)

0= PWM module pins controlled by PWM module at device Reset

(configured as output pins)

Preliminary

DS70283B-page 219

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 20-2: DSPIC33F CONFIGURATION BITS DESCRIPTION (CONTINUED)

Bit Field

Register

Description

HPOL

FPOR

Motor Control PWM High Side Polarity bit

1= PWM module high side output pins have active-high output polarity

0= PWM module high side output pins have active-low output polarity

LPOL

FPOR

Motor Control PWM Low Side Polarity bit

1= PWM module low side output pins have active-high output polarity

0= PWM module low side output pins have active-low output polarity

FPWRT<2:0>

Power-on Reset Timer Value Select bits

111= PWRT = 128 ms

110= PWRT = 64 ms

101= PWRT = 32 ms

100= PWRT = 16 ms

011= PWRT = 8 ms

010= PWRT = 4 ms

001= PWRT = 2 ms

000= PWRT = Disabled

ALTI2C

FPOR

Alternate I²C™ pins

1 = I²C mapped to SDA1/SCL1 pins

0 = I²C mapped to ASDA1/ASCL1 pins

DS70283B-page 220

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

20.2 On-Chip Voltage Regulator

20.3 BOR: Brown-Out Reset

The

dsPIC33FJ32MC202/204

and

The Brown-out Reset (BOR) module is based on an

internal voltage reference circuit that monitors the reg-

ulated supply voltage VDDCORE. The main purpose of

the BOR module is to generate a device Reset when a

brown-out condition occurs. Brown-out conditions are

generally caused by glitches on the AC mains (for

example, missing portions of the AC cycle waveform

due to bad power transmission lines, or voltage sags

due to excessive current draw when a large inductive

load is turned on).

dsPIC33FJ16MC304 devices power their core digital

logic at a nominal 2.5V. This can create a conflict for

designs that are required to operate at a higher typical

voltage, such as 3.3V. To simplify system design, all

devices in the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 family incorporate an on-chip

regulator that allows the device to run its core logic from

VDD.

The regulator provides power to the core from the other

VDD pins. When the regulator is enabled, a low-ESR

(less than 5 ohms) capacitor (such as tantalum or

ceramic) must be connected to the VDDCORE/VCAP pin

(Figure 20-1). This helps to maintain the stability of the

regulator. The recommended value for the filter capac-

itor is provided in Table 23-13 located in Section 23.1

“DC Characteristics”.

A BOR generates a Reset pulse, which resets the

device. The BOR selects the clock source, based on

the device Configuration bit values (FNOSC<2:0> and

POSCMD<1:0>).

If an oscillator mode is selected, the BOR activates the

Oscillator Start-up Timer (OST). The system clock is

held until OST expires. If the PLL is used, the clock is

held until the LOCK bit (OSCCON<5>) is ‘1’.

On a POR, it takes approximately 20 μs for the on-chip

voltage regulator to generate an output voltage. During

this time, designated as TSTARTUP, code execution is

disabled. TSTARTUP is applied every time the device

resumes operation after any power-down.

Concurrently, the PWRT time-out (TPWRT) is applied

before the internal Reset is released. If TPWRT = 0and

a crystal oscillator is being used, then a nominal delay

of TFSCM = 100 is applied. The total delay in this case

is TFSCM.

FIGURE 20-1:

CONNECTIONS FOR THE

ON-CHIP VOLTAGE

REGULATOR⁽¹⁾

The BOR Status bit (RCON<1>) is set to indicate that a

BOR has occurred. The BOR circuit, if enabled, contin-

ues to operate while in Sleep or Idle modes and resets

the device should VDD fall below the BOR threshold

voltage.

3.3V

dsPIC33F

VDD

VDDCORE/VCAP

VSS

CF

Note 1: These are typical operating voltages. Refer

to Table 23-13 located in Section 23.1 “DC

Characteristics” for the full operating

ranges of VDD and VDDCORE.

Preliminary

DS70283B-page 221

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

20.4.2

SLEEP AND IDLE MODES

20.4 Watchdog Timer (WDT)

If the WDT is enabled, it will continue to run during Sleep

or Idle modes. When the WDT time-out occurs, the

device will wake the device and code execution will con-

tinue from where the PWRSAVinstruction was executed.

The corresponding SLEEP or IDLE bits (RCON<3,2>) will

need to be cleared in software after the device wakes up.

For

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 devices, the WDT is driven by the

LPRC oscillator. When the WDT is enabled, the clock

source is also enabled.

20.4.1

PRESCALER/POSTSCALER

The nominal WDT clock source from LPRC is 32 kHz.

This feeds a prescaler than can be configured for either

5-bit (divide-by-32) or 7-bit (divide-by-128) operation.

The prescaler is set by the WDTPRE Configuration bit.

With a 32 kHz input, the prescaler yields a nominal

WDT time-out period (TWDT) of 1 ms in 5-bit mode, or

4 ms in 7-bit mode.

20.4.3

ENABLING WDT

The WDT is enabled or disabled by the FWDTEN

Configuration bit in the FWDT Configuration register.

When the FWDTEN Configuration bit is set, the WDT is

always enabled.

The WDT can be optionally controlled in software when

the FWDTEN Configuration bit has been programmed

to ‘0’. The WDT is enabled in software by setting the

SWDTEN control bit (RCON<5>). The SWDTEN con-

trol bit is cleared on any device Reset. The software

WDT option allows the user application to enable the

WDT for critical code segments and disable the WDT

during non-critical segments for maximum power

savings.

A variable postscaler divides down the WDT prescaler

output and allows for a wide range of time-out periods.

The postscaler is controlled by the WDTPOST<3:0>

Configuration bits (FWDT<3:0>), which allow the selec-

tion of 16 settings, from 1:1 to 1:32,768. Using the pres-

caler and postscaler, time-out periods ranging from

1 ms to 131 seconds can be achieved.

The WDT, prescaler and postscaler are reset:

• On any device Reset

Note:

If the WINDIS bit (FWDT<6>) is cleared, the

CLRWDTinstruction should be executed by

the application software only during the last

1/4 of the WDT period. This CLRWDT win-

dow can be determined by using a timer. If

a CLRWDT instruction is executed before

this window, a WDT Reset occurs.

• On the completion of a clock switch, whether

invoked by software (i.e., setting the OSWEN bit

after changing the NOSC bits) or by hardware

(i.e., Fail-Safe Clock Monitor)

• When a PWRSAVinstruction is executed

(i.e., Sleep or Idle mode is entered)

The WDT flag bit, WDTO (RCON<4>), is not automatically

cleared following a WDT time-out. To detect subsequent

WDT events, the flag must be cleared in software.

• When the device exits Sleep or Idle mode to

resume normal operation

• By a CLRWDTinstruction during normal execution

Note:

The CLRWDT and PWRSAV instructions

clear the prescaler and postscaler counts

when executed.

FIGURE 20-2:

WDT BLOCK DIAGRAM

All Device Resets

Transition to New Clock Source

Exit Sleep or Idle Mode

PWRSAVInstruction

CLRWDTInstruction

Watchdog Timer

Sleep/Idle

WDTPRE

Prescaler

WDTPOST<3:0>

SWDTEN

FWDTEN

WDT

Wake-up

1

0

RS

Postscaler

(divide by N2)

WDT

Reset

(divide by N1)

LPRC Clock

WDT Window Select

WINDIS

CLRWDTInstruction

DS70283B-page 222

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

20.5 JTAG Interface

20.7 In-Circuit Debugger

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

devices implement a JTAG interface, which supports

boundary scan device testing, as well as in-circuit pro-

gramming. Detailed information on this interface will be

provided in future revisions of the document.

When MPLAB^®ICD 2 is selected as a debugger, the in-

circuit debugging functionality is enabled. This function

allows simple debugging functions when used with

MPLAB IDE. Debugging functionality is controlled

through the EMUCx (Emulation/Debug Clock) and

EMUDx (Emulation/Debug Data) pin functions.

20.6

In-Circuit Serial Programming

Any of the three pairs of debugging clock/data pins can

be used:

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

family digital signal controllers can be serially

programmed while in the end application circuit. This is

done with two lines for clock and data and three other

lines for power, ground and the programming

sequence. Serial programming allows customers to

manufacture boards with unprogrammed devices and

then program the digital signal controller just before

shipping the product. Serial programming also allows

the most recent firmware or a custom firmware to be

programmed. Refer to the “dsPIC33F/PIC24H Flash

Programming Specification” (DS70152) document for

details about In-Circuit Serial Programming (ICSP).

• PGC1/EMUC1 and PGD1/EMUD1

• PGC2/EMUC2 and PGD2/EMUD2

• PGC3/EMUC3 and PGD3/EMUD3

To use the in-circuit debugger function of the device,

the design must implement ICSP connections to

MCLR, VDD, VSS, PGC, PGD and the EMUDx/EMUCx

pin pair. In addition, when the feature is enabled, some

of the resources are not available for general use.

These resources include the first 80 bytes of data RAM

and two I/O pins.

Any of the three pairs of programming clock/data pins

can be used:

• PGC1/EMUC1 and PGD1/EMUD1

• PGC2/EMUC2 and PGD2/EMUD2

• PGC3/EMUC3 and PGD3/EMUD3

Preliminary

DS70283B-page 223

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

When coupled with software encryption libraries, Code-

Guard™ Security can be used to securely update Flash

even when multiple IPs reside on the single chip.

20.8 Code Protection and

CodeGuard™ Security

The

dsPIC33FJ32MC202/204

and

The code protection features are controlled by the

Configuration registers: FBS and FGS.

dsPIC33FJ16MC304 devices offer the intermediate

implementation of CodeGuard™ Security. CodeGuard

Security enables multiple parties to securely share

resources (memory, interrupts and peripherals) on a

single chip. This feature helps protect individual

Intellectual Property in collaborative system designs.

Secure segment and RAM protection is not imple-

mented

in

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 devices.

Note:

Refer to CodeGuard Security Reference

Manual (DS70180) for further information

on usage, configuration and operation of

CodeGuard Security.

TABLE 20-3: CODE FLASH SECURITY

SEGMENT SIZES FOR

32 KBYTE DEVICES

TABLE 20-4: CODE FLASH SECURITY

SEGMENT SIZES FOR

16 KBYTE DEVICES

CONFIG BITS

000000h

VS = 256 IW

000000h

VS = 256 IW

0001FEh

000200h

0007FEh

BSS<2:0> = x11

000800h

001FFEh

000800h

001FFEh

002000h

003FFEh

004000h

002000h

0K

GS = 3840 IW

0057FEh

002BFEh

000000h

0001FEh

000200h

0007FEh

000800h

001FFEh

002000h

000000h

0001FEh

000200h

0007FEh

000800h

001FFEh

002000h

003FFEh

004000h

VS = 256 IW

BS = 768 IW

VS = 256 IW

BS = 768 IW

BSS<2:0> = x10

256

GS = 10249 IW

GS = 4608 IW

0057FEh

002BFEh

000000h

0001FEh

000200h

0007FEh

000800h

001FFEh

002000h

003FFEh

004000h

000000h

0001FEh

000200h

0007FEh

000800h

001FFEh

002000h

VS = 256 IW

BS = 3840 IW

VS = 256 IW

BS = 3840 IW

BSS<2:0> = x01

768

GS = 7168 IW

GS = 1536 IW

0057FEh

002BFEh

000000h

0001FEh

000200h

0007FEh

000800h

001FFEh

002000h

000000h

0001FEh

000200h

0007FEh

000800h

001FFEh

002000h

003FFEh

004000h

VS = 256 IW

BS = 7936 IW

VS = 256 IW

BS = 5376 IW

BSS<2:0> = x00

1792

GS = 3072 IW

0057FEh

002BFEh

DS70283B-page 224

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Most bit-oriented instructions (including simple rotate/

shift instructions) have two operands:

21.0 INSTRUCTION SET SUMMARY

Note:

This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 devices. It is not

intended to be a comprehensive reference

source. To complement the information in

this data sheet, refer to the “dsPIC33F

Family Reference Manual”. Please see

the Microchip web site (www.micro-

chip.com) for the latest dsPIC33F Family

Reference Manual sections.

• The W register (with or without an address

modifier) or file register (specified by the value of

‘Ws’ or ‘f’)

• The bit in the W register or file register

(specified by a literal value or indirectly by the

contents of register ‘Wb’)

The literal instructions that involve data movement can

use some of the following operands:

• A literal value to be loaded into a W register or file

register (specified by ‘k’)

The dsPIC33F instruction set is identical to that of the

dsPIC30F.

• The W register or file register where the literal

value is to be loaded (specified by ‘Wb’ or ‘f’)

Most instructions are a single program memory word

(24 bits). Only three instructions require two program

memory locations.

However, literal instructions that involve arithmetic or

logical operations use some of the following operands:

• The first source operand, which is a register ‘Wb’

without any address modifier

Each single-word instruction is a 24-bit word, divided

into an 8-bit opcode, which specifies the instruction

type and one or more operands, which further specify

the operation of the instruction.

• The second source operand, which is a literal

value

• The destination of the result (only if not the same

as the first source operand), which is typically a

register ‘Wd’ with or without an address modifier

The instruction set is highly orthogonal and is grouped

into five basic categories:

• Word or byte-oriented operations

• Bit-oriented operations

• Literal operations

The MACclass of DSP instructions can use some of the

following operands:

• The accumulator (A or B) to be used (required

operand)

• DSP operations

• Control operations

• The W registers to be used as the two operands

• The X and Y address space prefetch operations

• The X and Y address space prefetch destinations

• The accumulator write-back destination

Table 21-1 shows the general symbols used in

describing the instructions.

The dsPIC33F instruction set summary in Table 21-2

lists all the instructions, along with the status flags

affected by each instruction.

The other DSP instructions do not involve any

multiplication and can include:

Most word or byte-oriented W register instructions

(including barrel shift instructions) have three

operands:

• The accumulator to be used (required)

• The source or destination operand (designated as

Wso or Wdo, respectively) with or without an

address modifier

• The first source operand, which is typically a

register ‘Wb’ without any address modifier

• The amount of shift specified by a W register ‘Wn’

or a literal value

• The second source operand, which is typically a

register ‘Ws’ with or without an address modifier

The control instructions can use some of the following

operands:

• The destination of the result, which is typically a

register ‘Wd’ with or without an address modifier

• A program memory address

However, word or byte-oriented file register instructions

have two operands:

• The mode of the table read and table write

instructions

• The file register specified by the value ‘f’

• The destination, which could be either the file

register ‘f’ or the W0 register, which is denoted as

‘WREG’

Preliminary

DS70283B-page 225

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Most instructions are a single word. Certain double-

word instructions are designed to provide all the

required information in these 48 bits. In the second

word, the 8 MSbs are ‘0’s. If this second word is exe-

cuted as an instruction (by itself), it will execute as a

NOP.

as a NOP. Notable exceptions are the BRA (uncondi-

tional/computed branch), indirect CALL/GOTO, all table

reads and writes and RETURN/RETFIE instructions,

which are single-word instructions but take two or three

cycles. Certain instructions that involve skipping over the

subsequent instruction require either two or three cycles

if the skip is performed, depending on whether the

instruction being skipped is a single-word or two-word

instruction. Moreover, double-word moves require two

cycles.

The double-word instructions execute in two instruction

cycles.

Most single-word instructions are executed in a single

instruction cycle, unless a conditional test is true, or the

program counter is changed as a result of the instruc-

tion. In these cases, the execution takes two instruction

cycles with the additional instruction cycle(s) executed

Note:

For more details on the instruction set,

refer to the “dsPIC30F/33F Programmer’s

Reference Manual” (DS70157).

TABLE 21-1: SYMBOLS USED IN OPCODE DESCRIPTIONS

Field

Description

#text

(text)

[text]

{ }

Means literal defined by “text”

Means “content of text”

Means “the location addressed by text”

Optional field or operation

Register bit field

<n:m>

.b

Byte mode selection

.d

Double-Word mode selection

Shadow register select

.S

.w

Word mode selection (default)

One of two accumulators {A, B}

Acc

AWB

bit4

Accumulator write back destination address register ∈ {W13, [W13]+ = 2}

4-bit bit selection field (used in word addressed instructions) ∈ {0...15}

MCU Status bits: Carry, Digit Carry, Negative, Overflow, Sticky Zero

Absolute address, label or expression (resolved by the linker)

File register address ∈ {0x0000...0x1FFF}

C, DC, N, OV, Z

Expr

f

lit1

1-bit unsigned literal ∈ {0,1}

lit4

4-bit unsigned literal ∈ {0...15}

lit5

5-bit unsigned literal ∈ {0...31}

lit8

8-bit unsigned literal ∈ {0...255}

lit10

10-bit unsigned literal ∈ {0...255} for Byte mode, {0:1023} for Word mode

14-bit unsigned literal ∈ {0...16384}

lit14

lit16

16-bit unsigned literal ∈ {0...65535}

lit23

23-bit unsigned literal ∈ {0...8388608}; LSb must be ‘0’

Field does not require an entry, can be blank

DSP Status bits: ACCA Overflow, ACCB Overflow, ACCA Saturate, ACCB Saturate

Program Counter

None

OA, OB, SA, SB

PC

Slit10

Slit16

Slit6

Wb

10-bit signed literal ∈ {-512...511}

16-bit signed literal ∈ {-32768...32767}

6-bit signed literal ∈ {-16...16}

Base W register ∈ {W0..W15}

Wd

Destination W register ∈ { Wd, [Wd], [Wd++], [Wd--], [++Wd], [--Wd] }

Wdo

Destination W register ∈

{ Wnd, [Wnd], [Wnd++], [Wnd--], [++Wnd], [--Wnd], [Wnd+Wb] }

Wm,Wn

Dividend, Divisor working register pair (direct addressing)

DS70283B-page 226

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 21-1: SYMBOLS USED IN OPCODE DESCRIPTIONS (CONTINUED)

Field

Description

Wm*Wm

Wm*Wn

Multiplicand and Multiplier working register pair for Square instructions ∈

{W4 * W4,W5 * W5,W6 * W6,W7 * W7}

Multiplicand and Multiplier working register pair for DSP instructions ∈

{W4 * W5,W4 * W6,W4 * W7,W5 * W6,W5 * W7,W6 * W7}

Wn

One of 16 working registers ∈ {W0..W15}

Wnd

Wns

WREG

Ws

One of 16 destination working registers ∈ {W0..W15}

One of 16 source working registers ∈ {W0..W15}

W0 (working register used in file register instructions)

Source W register ∈ { Ws, [Ws], [Ws++], [Ws--], [++Ws], [--Ws] }

Wso

Source W register ∈

{ Wns, [Wns], [Wns++], [Wns--], [++Wns], [--Wns], [Wns+Wb] }

Wx

X data space prefetch address register for DSP instructions

∈ {[W8] + = 6, [W8] + = 4, [W8] + = 2, [W8], [W8] - = 6, [W8] - = 4, [W8] - = 2,

[W9] + = 6, [W9] + = 4, [W9] + = 2, [W9], [W9] - = 6, [W9] - = 4, [W9] - = 2,

[W9 + W12], none}

Wxd

Wy

X data space prefetch destination register for DSP instructions ∈ {W4..W7}

Y data space prefetch address register for DSP instructions

∈ {[W10] + = 6, [W10] + = 4, [W10] + = 2, [W10], [W10] - = 6, [W10] - = 4, [W10] - = 2,

[W11] + = 6, [W11] + = 4, [W11] + = 2, [W11], [W11] - = 6, [W11] - = 4, [W11] - = 2,

[W11 + W12], none}

Wyd

Y data space prefetch destination register for DSP instructions ∈ {W4..W7}

Preliminary

DS70283B-page 227

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 21-2: INSTRUCTION SET OVERVIEW

Base

Instr

#

Assembly

Mnemonic

# of

Status Flags

Affected

Assembly Syntax

Description

Words Cycles

1

ADD

ADDC

AND

ASR

BCLR

BRA

BSET

BSW.C

BSW.Z

BTG

Acc

Add Accumulators

1

OA,OB,SA,SB

C,DC,N,OV,Z

OA,OB,SA,SB

C,DC,N,OV,Z

N,Z

f

f = f + WREG

f,WREG

WREG = f + WREG

1

#lit10,Wn

Wb,Ws,Wd

Wb,#lit5,Wd

Wso,#Slit4,Acc

f

Wd = lit10 + Wd

1

Wd = Wb + Ws

1

Wd = Wb + lit5

1

16-bit Signed Add to Accumulator

f = f + WREG + (C)

1

2

3

4

ADDC

AND

1

f,WREG

WREG = f + WREG + (C)

Wd = lit10 + Wd + (C)

Wd = Wb + Ws + (C)

Wd = Wb + lit5 + (C)

1

#lit10,Wn

Wb,Ws,Wd

Wb,#lit5,Wd

f

1

f = f .AND. WREG

1

f,WREG

WREG = f .AND. WREG

Wd = lit10 .AND. Wd

Wd = Wb .AND. Ws

1

N,Z

#lit10,Wn

Wb,Ws,Wd

Wb,#lit5,Wd

f

1

N,Z

1

N,Z

Wd = Wb .AND. lit5

1

N,Z

ASR

f = Arithmetic Right Shift f

WREG = Arithmetic Right Shift f

Wd = Arithmetic Right Shift Ws

Wnd = Arithmetic Right Shift Wb by Wns

Wnd = Arithmetic Right Shift Wb by lit5

Bit Clear f

1

C,N,OV,Z

N,Z

f,WREG

1

Ws,Wd

1

Wb,Wns,Wnd

Wb,#lit5,Wnd

f,#bit4

Ws,#bit4

C,Expr

1

N,Z

5

6

BCLR

BRA

1

None

Bit Clear Ws

1

None

Branch if Carry

1 (2)

2

None

GE,Expr

GEU,Expr

GT,Expr

GTU,Expr

LE,Expr

LEU,Expr

LT,Expr

LTU,Expr

N,Expr

Branch if greater than or equal

Branch if unsigned greater than or equal

Branch if greater than

Branch if unsigned greater than

Branch if less than or equal

Branch if unsigned less than or equal

Branch if less than

None

Branch if unsigned less than

Branch if Negative

None

NC,Expr

NN,Expr

NOV,Expr

NZ,Expr

OA,Expr

OB,Expr

OV,Expr

SA,Expr

SB,Expr

Expr

Branch if Not Carry

None

Branch if Not Negative

Branch if Not Overflow

Branch if Not Zero

None

Branch if Accumulator A overflow

Branch if Accumulator B overflow

Branch if Overflow

None

Branch if Accumulator A saturated

Branch if Accumulator B saturated

Branch Unconditionally

Branch if Zero

None

Z,Expr

1 (2)

2

None

Wn

Computed Branch

None

7

8

9

BSET

BSW

f,#bit4

Ws,#bit4

Ws,Wb

Bit Set f

1

None

Bit Set Ws

1

None

Write C bit to Ws<Wb>

Write Z bit to Ws<Wb>

Bit Toggle f

1

None

Ws,Wb

1

None

BTG

f,#bit4

Ws,#bit4

1

None

Bit Toggle Ws

1

None

DS70283B-page 228

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 21-2: INSTRUCTION SET OVERVIEW (CONTINUED)

Base

Instr

#

Assembly

Mnemonic

# of

Status Flags

Affected

Assembly Syntax

Description

Words Cycles

10

BTSC

BTSS

BTST

BTSC

BTSS

f,#bit4

Ws,#bit4

f,#bit4

Ws,#bit4

Bit Test f, Skip if Clear

1

None

(2 or 3)

Bit Test Ws, Skip if Clear

Bit Test f, Skip if Set

1

(2 or 3)

11

12

1

(2 or 3)

Bit Test Ws, Skip if Set

1

(2 or 3)

BTST

f,#bit4

Ws,#bit4

Ws,Wb

Bit Test f

1

2

1

2

1

Z

BTST.C

BTST.Z

BTST.C

BTST.Z

BTSTS

Bit Test Ws to C

Bit Test Ws to Z

Bit Test Ws<Wb> to C

Bit Test Ws<Wb> to Z

Bit Test then Set f

Bit Test Ws to C, then Set

Bit Test Ws to Z, then Set

Call subroutine

C

Z

C

Ws,Wb

Z

13

BTSTS

f,#bit4

Z

C

BTSTS.C Ws,#bit4

BTSTS.Z Ws,#bit4

Z

14

15

CALL

CLR

CALL

CLR

lit23

None

Wn

Call indirect subroutine

f = 0x0000

None

f

None

CLR

WREG

WREG = 0x0000

Ws = 0x0000

None

CLR

Ws

None

CLR

Acc,Wx,Wxd,Wy,Wyd,AWB

Clear Accumulator

Clear Watchdog Timer

f = f

OA,OB,SA,SB

WDTO,Sleep

N,Z

16

17

CLRWDT

COM

CLRWDT

COM

f

COM

CP

f,WREG

Ws,Wd

f

WREG = f

1

N,Z

Wd = Ws

N,Z

18

CP

Compare f with WREG

Compare Wb with lit5

C,DC,N,OV,Z

CP

Wb,#lit5

Wb,Ws

f

CP

Compare Wb with Ws (Wb – Ws)

Compare f with 0x0000

Compare Ws with 0x0000

Compare f with WREG, with Borrow

Compare Wb with lit5, with Borrow

19

20

CP0

CPB

CP0

CPB

Ws

f

Wb,#lit5

Wb,Ws

Compare Wb with Ws, with Borrow

(Wb – Ws – C)

21

22

23

24

CPSEQ

CPSGT

CPSLT

CPSNE

CPSEQ

CPSGT

CPSLT

CPSNE

Wb, Wn

Compare Wb with Wn, skip if =

Compare Wb with Wn, skip if >

Compare Wb with Wn, skip if <

Compare Wb with Wn, skip if ≠

1

None

(2 or 3)

1

(2 or 3)

1

(2 or 3)

1

(2 or 3)

25

26

DAW

DEC

DAW

Wn

Wn = decimal adjust Wn

f = f – 1

1

C

DEC

f

C,DC,N,OV,Z

None

DEC

f,WREG

Ws,Wd

f

WREG = f – 1

DEC

Wd = Ws – 1

27

28

DEC2

DISI

DEC2

DISI

f = f – 2

f,WREG

Ws,Wd

#lit14

WREG = f – 2

Wd = Ws – 2

Disable Interrupts for k instruction cycles

Preliminary

DS70283B-page 229

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 21-2: INSTRUCTION SET OVERVIEW (CONTINUED)

Base

Instr

#

Assembly

Mnemonic

# of

Status Flags

Affected

Assembly Syntax

Description

Words Cycles

29

DIV

DIV.S

DIV.SD

DIV.U

DIV.UD

DIVF

DO

Wm,Wn

Signed 16/16-bit Integer Divide

1

2

1

18

2

N,Z,C,OV

None

Wm,Wn

Signed 32/16-bit Integer Divide

Wm,Wn

Unsigned 16/16-bit Integer Divide

Unsigned 32/16-bit Integer Divide

Signed 16/16-bit Fractional Divide

Do code to PC + Expr, lit14 + 1 times

Do code to PC + Expr, (Wn) + 1 times

Euclidean Distance (no accumulate)

Wm,Wn

30

31

DIVF

DO

Wm,Wn

#lit14,Expr

Wn,Expr

DO

2

None

32

33

ED

Wm*Wm,Acc,Wx,Wy,Wxd

1

OA,OB,OAB,

SA,SB,SAB

EDAC

Wm*Wm,Acc,Wx,Wy,Wxd

Euclidean Distance

1

OA,OB,OAB,

SA,SB,SAB

34

35

36

37

38

EXCH

FBCL

FF1L

FF1R

GOTO

EXCH

FBCL

FF1L

FF1R

GOTO

INC

Wns,Wnd

Ws,Wnd

Expr

Swap Wns with Wnd

Find Bit Change from Left (MSb) Side

Find First One from Left (MSb) Side

Find First One from Right (LSb) Side

Go to address

1

2

1

2

1

None

C

None

Wn

Go to indirect

None

39

40

41

INC

f

f = f + 1

C,DC,N,OV,Z

N,Z

INC

f,WREG

Ws,Wd

WREG = f + 1

INC

Wd = Ws + 1

INC2

IOR

INC2

IOR

f

f = f + 2

f,WREG

Ws,Wd

WREG = f + 2

Wd = Ws + 2

f

f = f .IOR. WREG

IOR

f,WREG

#lit10,Wn

Wb,Ws,Wd

Wb,#lit5,Wd

Wso,#Slit4,Acc

WREG = f .IOR. WREG

Wd = lit10 .IOR. Wd

Wd = Wb .IOR. Ws

Wd = Wb .IOR. lit5

Load Accumulator

N,Z

IOR

N,Z

IOR

N,Z

IOR

N,Z

42

LAC

OA,OB,OAB,

SA,SB,SAB

43

44

LNK

LSR

LNK

LSR

MAC

#lit14

Link Frame Pointer

1

None

C,N,OV,Z

N,Z

f

f = Logical Right Shift f

f,WREG

WREG = Logical Right Shift f

Wd = Logical Right Shift Ws

Wnd = Logical Right Shift Wb by Wns

Wnd = Logical Right Shift Wb by lit5

Ws,Wd

Wb,Wns,Wnd

Wb,#lit5,Wnd

N,Z

45

46

MAC

MOV

Wm*Wn,Acc,Wx,Wxd,Wy,Wyd Multiply and Accumulate

,

AWB

OA,OB,OAB,

SA,SB,SAB

MAC

Wm*Wm,Acc,Wx,Wxd,Wy,Wyd Square and Accumulate

1

OA,OB,OAB,

SA,SB,SAB

MOV

f,Wn

Move f to Wn

1

2

1

None

N,Z

MOV

f

Move f to f

MOV

f,WREG

Move f to WREG

N,Z

MOV

#lit16,Wn

#lit8,Wn

Wn,f

Move 16-bit literal to Wn

Move 8-bit literal to Wn

Move Wn to f

None

N,Z

MOV.b

MOV

Wso,Wdo

Move Ws to Wd

MOV

WREG,f

Move WREG to f

MOV.D

MOVSAC

Wns,Wd

Move Double from W(ns):W(ns + 1) to Wd

Move Double from Ws to W(nd + 1):W(nd)

Prefetch and store accumulator

None

Ws,Wnd

47

MOVSAC

Acc,Wx,Wxd,Wy,Wyd,AWB

DS70283B-page 230

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 21-2: INSTRUCTION SET OVERVIEW (CONTINUED)

Base

Instr

#

Assembly

Mnemonic

# of

Status Flags

Affected

Assembly Syntax

Description

Words Cycles

48

MPY

Multiply Wm by Wn to Accumulator

Square Wm to Accumulator

1

OA,OB,OAB,

SA,SB,SAB

Wm*Wn,Acc,Wx,Wxd,Wy,Wyd

MPY

OA,OB,OAB,

SA,SB,SAB

Wm*Wm,Acc,Wx,Wxd,Wy,Wyd

49

50

MPY.N

MSC

MPY.N

-(Multiply Wm by Wn) to Accumulator

None

Wm*Wn,Acc,Wx,Wxd,Wy,Wyd

MSC

Wm*Wm,Acc,Wx,Wxd,Wy,Wyd Multiply and Subtract from Accumulator

OA,OB,OAB,

SA,SB,SAB

,

AWB

51

MUL

MUL.SS

MUL.SU

MUL.US

MUL.UU

Wb,Ws,Wnd

{Wnd + 1, Wnd} = signed(Wb) * signed(Ws)

{Wnd + 1, Wnd} = signed(Wb) * unsigned(Ws)

{Wnd + 1, Wnd} = unsigned(Wb) * signed(Ws)

1

None

{Wnd + 1, Wnd} = unsigned(Wb) *

unsigned(Ws)

MUL.SU

MUL.UU

Wb,#lit5,Wnd

{Wnd + 1, Wnd} = signed(Wb) * unsigned(lit5)

1

None

{Wnd + 1, Wnd} = unsigned(Wb) *

unsigned(lit5)

MUL

NEG

f

W3:W2 = f * WREG

Negate Accumulator

1

None

52

NEG

Acc

OA,OB,OAB,

SA,SB,SAB

NEG

f

f = f + 1

1

C,DC,N,OV,Z

NEG

f,WREG

Ws,Wd

WREG = f + 1

1

2

C,DC,N,OV,Z

None

NEG

Wd = Ws + 1

53

54

NOP

POP

NOP

No Operation

NOPR

POP

No Operation

None

f

Pop f from Top-of-Stack (TOS)

Pop from Top-of-Stack (TOS) to Wdo

None

POP

Wdo

Wnd

None

POP.D

Pop from Top-of-Stack (TOS) to

W(nd):W(nd + 1)

None

POP.S

PUSH

Pop Shadow Registers

1

All

None

WDTO,Sleep

None

C,N,Z

N,Z

55

PUSH

f

Push f to Top-of-Stack (TOS)

Push Wso to Top-of-Stack (TOS)

Push W(ns):W(ns + 1) to Top-of-Stack (TOS)

Push Shadow Registers

1

PUSH

Wso

Wns

1

PUSH.D

PUSH.S

PWRSAV

RCALL

REPEAT

RESET

RETFIE

RETLW

RETURN

RLC

2

1

56

57

PWRSAV

RCALL

#lit1

Expr

Wn

Go into Sleep or Idle mode

Relative Call

1

2

Computed Call

2

58

REPEAT

#lit14

Wn

Repeat Next Instruction lit14 + 1 times

Repeat Next Instruction (Wn) + 1 times

Software device Reset

1

59

60

61

62

63

RESET

RETFIE

RETLW

RETURN

RLC

1

Return from interrupt

3 (2)

#lit10,Wn

Return with literal in Wn

3 (2)

Return from Subroutine

3 (2)

1

f

f = Rotate Left through Carry f

WREG = Rotate Left through Carry f

Wd = Rotate Left through Carry Ws

f = Rotate Left (No Carry) f

RLC

f,WREG

Ws,Wd

f

1

RLC

1

64

65

RLNC

RRC

RLNC

1

RLNC

f,WREG

Ws,Wd

f

WREG = Rotate Left (No Carry) f

Wd = Rotate Left (No Carry) Ws

f = Rotate Right through Carry f

WREG = Rotate Right through Carry f

Wd = Rotate Right through Carry Ws

1

N,Z

RLNC

1

N,Z

RRC

1

C,N,Z

RRC

f,WREG

Ws,Wd

1

RRC

1

Preliminary

DS70283B-page 231

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 21-2: INSTRUCTION SET OVERVIEW (CONTINUED)

Base

Instr

#

Assembly

Mnemonic

# of

Status Flags

Affected

Assembly Syntax

Description

Words Cycles

66

RRNC

SAC

RRNC

SAC

f

f = Rotate Right (No Carry) f

WREG = Rotate Right (No Carry) f

Wd = Rotate Right (No Carry) Ws

Store Accumulator

1

N,Z

f,WREG

Ws,Wd

N,Z

67

Acc,#Slit4,Wdo

None

C,N,Z

None

SAC.R

SE

Acc,#Slit4,Wdo

Store Rounded Accumulator

Wnd = sign-extended Ws

f = 0xFFFF

68

69

SE

Ws,Wnd

f

SETM

SFTAC

WREG

Ws

WREG = 0xFFFF

Ws = 0xFFFF

70

71

SFTAC

SL

Acc,Wn

Arithmetic Shift Accumulator by (Wn)

OA,OB,OAB,

SA,SB,SAB

SFTAC

Acc,#Slit6

Arithmetic Shift Accumulator by Slit6

1

OA,OB,OAB,

SA,SB,SAB

SL

SUB

f

f = Left Shift f

1

C,N,OV,Z

N,Z

f,WREG

Ws,Wd

WREG = Left Shift f

Wd = Left Shift Ws

Wb,Wns,Wnd

Wb,#lit5,Wnd

Acc

Wnd = Left Shift Wb by Wns

Wnd = Left Shift Wb by lit5

Subtract Accumulators

N,Z

72

SUB

OA,OB,OAB,

SA,SB,SAB

SUB

SUBB

f

f = f – WREG

1

C,DC,N,OV,Z

f,WREG

#lit10,Wn

Wb,Ws,Wd

Wb,#lit5,Wd

f

WREG = f – WREG

Wn = Wn – lit10

Wd = Wb – Ws

Wd = Wb – lit5

73

SUBB

f = f – WREG – (C)

WREG = f – WREG – (C)

f,WREG

SUBB

SUBR

#lit10,Wn

Wb,Ws,Wd

Wb,#lit5,Wd

f

Wn = Wn – lit10 – (C)

Wd = Wb – Ws – (C)

Wd = Wb – lit5 – (C)

f = WREG – f

1

C,DC,N,OV,Z

74

75

SUBR

f,WREG

WREG = WREG – f

Wd = Ws – Wb

Wb,Ws,Wd

Wb,#lit5,Wd

Wd = lit5 – Wb

SUBBR

f

f = WREG – f – (C)

1

C,DC,N,OV,Z

f,WREG

Wb,Ws,Wd

WREG = WREG – f – (C)

Wd = Ws – Wb – (C)

SUBBR

SWAP.b

SWAP

TBLRDH

TBLRDL

TBLWTH

TBLWTL

ULNK

XOR

Wb,#lit5,Wd

Wn

Wd = lit5 – Wb – (C)

1

2

1

C,DC,N,OV,Z

None

N,Z

76

SWAP

Wn = nibble swap Wn

Wn = byte swap Wn

Wn

77

78

79

80

81

82

TBLRDH

TBLRDL

TBLWTH

TBLWTL

ULNK

Ws,Wd

Read Prog<23:16> to Wd<7:0>

Read Prog<15:0> to Wd

Write Ws<7:0> to Prog<23:16>

Write Ws to Prog<15:0>

Unlink Frame Pointer

f = f .XOR. WREG

XOR

f

XOR

f,WREG

WREG = f .XOR. WREG

Wd = lit10 .XOR. Wd

N,Z

XOR

#lit10,Wn

Wb,Ws,Wd

Wb,#lit5,Wd

Ws,Wnd

N,Z

XOR

Wd = Wb .XOR. Ws

N,Z

XOR

Wd = Wb .XOR. lit5

N,Z

83

ZE

Wnd = Zero-extend Ws

C,Z,N

DS70283B-page 232

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

22.1 MPLAB Integrated Development

Environment Software

22.0 DEVELOPMENT SUPPORT

The PIC^®microcontrollers are supported with a full

range of hardware and software development tools:

The MPLAB IDE software brings an ease of software

development previously unseen in the 8/16-bit micro-

controller market. The MPLAB IDE is a Windows^®

operating system-based application that contains:

• Integrated Development Environment

- MPLAB^®IDE Software

• Assemblers/Compilers/Linkers

- MPASM^TMAssembler

• A single graphical interface to all debugging tools

- Simulator

- MPLAB C18 and MPLAB C30 C Compilers

- MPLINK^TMObject Linker/

MPLIB^TMObject Librarian

- Programmer (sold separately)

- Emulator (sold separately)

- In-Circuit Debugger (sold separately)

• A full-featured editor with color-coded context

• A multiple project manager

- MPLAB ASM30 Assembler/Linker/Library

• Simulators

- MPLAB SIM Software Simulator

• Emulators

• Customizable data windows with direct edit of

contents

- MPLAB ICE 2000 In-Circuit Emulator

- MPLAB REAL ICE™ In-Circuit Emulator

• In-Circuit Debugger

• High-level source code debugging

• Visual device initializer for easy register

initialization

- MPLAB ICD 2

• Mouse over variable inspection

• Device Programmers

• Drag and drop variables from source to watch

windows

- PICSTART^®Plus Development Programmer

- MPLAB PM3 Device Programmer

- PICkit™ 2 Development Programmer

• Extensive on-line help

• Integration of select third party tools, such as

HI-TECH Software C Compilers and IAR

C Compilers

• Low-Cost Demonstration and Development

Boards and Evaluation Kits

The MPLAB IDE allows you to:

• Edit your source files (either assembly or C)

• One touch assemble (or compile) and download

to PIC MCU emulator and simulator tools

(automatically updates all project information)

• Debug using:

- Source files (assembly or C)

- Mixed assembly and C

- Machine code

MPLAB IDE supports multiple debugging tools in a

single development paradigm, from the cost-effective

simulators, through low-cost in-circuit debuggers, to

full-featured emulators. This eliminates the learning

curve when upgrading to tools with increased flexibility

and power.

Preliminary

DS70283B-page 233

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

22.2 MPASM Assembler

22.5 MPLAB ASM30 Assembler, Linker

and Librarian

The MPASM Assembler is a full-featured, universal

macro assembler for all PIC MCUs.

MPLAB ASM30 Assembler produces relocatable

machine code from symbolic assembly language for

dsPIC30F devices. MPLAB C30 C Compiler uses the

assembler to produce its object file. The assembler

generates relocatable object files that can then be

archived or linked with other relocatable object files and

archives to create an executable file. Notable features

of the assembler include:

The MPASM Assembler generates relocatable object

files for the MPLINK Object Linker, Intel^®standard HEX

files, MAP files to detail memory usage and symbol

reference, absolute LST files that contain source lines

and generated machine code and COFF files for

debugging.

The MPASM Assembler features include:

• Integration into MPLAB IDE projects

• Support for the entire dsPIC30F instruction set

• Support for fixed-point and floating-point data

• Command line interface

• User-defined macros to streamline

assembly code

• Rich directive set

• Conditional assembly for multi-purpose

source files

• Flexible macro language

• MPLAB IDE compatibility

• Directives that allow complete control over the

assembly process

22.6 MPLAB SIM Software Simulator

22.3 MPLAB C18 and MPLAB C30

C Compilers

The MPLAB SIM Software Simulator allows code

development in a PC-hosted environment by simulat-

ing the PIC MCUs and dsPIC^®DSCs on an instruction

level. On any given instruction, the data areas can be

examined or modified and stimuli can be applied from

a comprehensive stimulus controller. Registers can be

logged to files for further run-time analysis. The trace

buffer and logic analyzer display extend the power of

the simulator to record and track program execution,

actions on I/O, most peripherals and internal registers.

The MPLAB C18 and MPLAB C30 Code Development

Systems are complete ANSI

C

compilers for

Microchip’s PIC18 and PIC24 families of microcontrol-

lers and the dsPIC30 and dsPIC33 family of digital sig-

nal controllers. These compilers provide powerful

integration capabilities, superior code optimization and

ease of use not found with other compilers.

For easy source level debugging, the compilers provide

symbol information that is optimized to the MPLAB IDE

debugger.

The MPLAB SIM Software Simulator fully supports

symbolic debugging using the MPLAB C18 and

MPLAB C30 C Compilers, and the MPASM and

MPLAB ASM30 Assemblers. The software simulator

offers the flexibility to develop and debug code outside

of the hardware laboratory environment, making it an

excellent, economical software development tool.

22.4 MPLINK Object Linker/

MPLIB Object Librarian

The MPLINK Object Linker combines relocatable

objects created by the MPASM Assembler and the

MPLAB C18 C Compiler. It can link relocatable objects

from precompiled libraries, using directives from a

linker script.

The MPLIB Object Librarian manages the creation and

modification of library files of precompiled code. When

a routine from a library is called from a source file, only

the modules that contain that routine will be linked in

with the application. This allows large libraries to be

used efficiently in many different applications.

The object linker/library features include:

• Efficient linking of single libraries instead of many

smaller files

• Enhanced code maintainability by grouping

related modules together

• Flexible creation of libraries with easy module

listing, replacement, deletion and extraction

DS70283B-page 234

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

22.7 MPLAB ICE 2000

22.9 MPLAB ICD 2 In-Circuit Debugger

High-Performance

In-Circuit Emulator

Microchip’s In-Circuit Debugger, MPLAB ICD 2, is a

powerful, low-cost, run-time development tool,

connecting to the host PC via an RS-232 or high-speed

USB interface. This tool is based on the Flash PIC

MCUs and can be used to develop for these and other

PIC MCUs and dsPIC DSCs. The MPLAB ICD 2 utilizes

the in-circuit debugging capability built into the Flash

devices. This feature, along with Microchip’s In-Circuit

Serial Programming^TM(ICSP^TM) protocol, offers cost-

effective, in-circuit Flash debugging from the graphical

user interface of the MPLAB Integrated Development

Environment. This enables a designer to develop and

debug source code by setting breakpoints, single step-

ping and watching variables, and CPU status and

peripheral registers. Running at full speed enables

testing hardware and applications in real time. MPLAB

ICD 2 also serves as a development programmer for

selected PIC devices.

The MPLAB ICE 2000 In-Circuit Emulator is intended

to provide the product development engineer with a

complete microcontroller design tool set for PIC

microcontrollers. Software control of the MPLAB ICE

2000 In-Circuit Emulator is advanced by the MPLAB

Integrated Development Environment, which allows

editing, building, downloading and source debugging

from a single environment.

The MPLAB ICE 2000 is a full-featured emulator

system with enhanced trace, trigger and data monitor-

ing features. Interchangeable processor modules allow

the system to be easily reconfigured for emulation of

different processors. The architecture of the MPLAB

ICE 2000 In-Circuit Emulator allows expansion to

support new PIC microcontrollers.

The MPLAB ICE 2000 In-Circuit Emulator system has

been designed as a real-time emulation system with

advanced features that are typically found on more

expensive development tools. The PC platform and

Microsoft^®Windows^®32-bit operating system were

chosen to best make these features available in a

simple, unified application.

22.10 MPLAB PM3 Device Programmer

The MPLAB PM3 Device Programmer is a universal,

CE compliant device programmer with programmable

voltage verification at VDDMIN and VDDMAX for

maximum reliability. It features a large LCD display

(128 x 64) for menus and error messages and a modu-

lar, detachable socket assembly to support various

package types. The ICSP™ cable assembly is included

as a standard item. In Stand-Alone mode, the MPLAB

PM3 Device Programmer can read, verify and program

PIC devices without a PC connection. It can also set

code protection in this mode. The MPLAB PM3

connects to the host PC via an RS-232 or USB cable.

The MPLAB PM3 has high-speed communications and

optimized algorithms for quick programming of large

memory devices and incorporates an SD/MMC card for

file storage and secure data applications.

22.8 MPLAB REAL ICE In-Circuit

Emulator System

MPLAB REAL ICE In-Circuit Emulator System is

Microchip’s next generation high-speed emulator for

Microchip Flash DSC and MCU devices. It debugs and

programs PIC^®Flash MCUs and dsPIC^®Flash DSCs

with the easy-to-use, powerful graphical user interface of

the MPLAB Integrated Development Environment (IDE),

included with each kit.

The MPLAB REAL ICE probe is connected to the design

engineer’s PC using a high-speed USB 2.0 interface and

is connected to the target with either a connector

compatible with the popular MPLAB ICD 2 system

(RJ11) or with the new high-speed, noise tolerant, Low-

Voltage Differential Signal (LVDS) interconnection

(CAT5).

MPLAB REAL ICE is field upgradeable through future

firmware downloads in MPLAB IDE. In upcoming

releases of MPLAB IDE, new devices will be supported,

and new features will be added, such as software break-

points and assembly code trace. MPLAB REAL ICE

offers significant advantages over competitive emulators

including low-cost, full-speed emulation, real-time

variable watches, trace analysis, complex breakpoints, a

ruggedized probe interface and long (up to three meters)

interconnection cables.

Preliminary

DS70283B-page 235

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

22.11 PICSTART Plus Development

Programmer

22.13 Demonstration, Development and

Evaluation Boards

The PICSTART Plus Development Programmer is an

easy-to-use, low-cost, prototype programmer. It

connects to the PC via a COM (RS-232) port. MPLAB

Integrated Development Environment software makes

using the programmer simple and efficient. The

PICSTART Plus Development Programmer supports

most PIC devices in DIP packages up to 40 pins.

Larger pin count devices, such as the PIC16C92X and

PIC17C76X, may be supported with an adapter socket.

The PICSTART Plus Development Programmer is CE

compliant.

A wide variety of demonstration, development and

evaluation boards for various PIC MCUs and dsPIC

DSCs allows quick application development on fully func-

tional systems. Most boards include prototyping areas for

adding custom circuitry and provide application firmware

and source code for examination and modification.

The boards support a variety of features, including LEDs,

temperature sensors, switches, speakers, RS-232

interfaces, LCD displays, potentiometers and additional

EEPROM memory.

The demonstration and development boards can be

used in teaching environments, for prototyping custom

circuits and for learning about various microcontroller

applications.

22.12 PICkit 2 Development Programmer

The PICkit™ 2 Development Programmer is a low-cost

programmer and selected Flash device debugger with

an easy-to-use interface for programming many of

Microchip’s baseline, mid-range and PIC18F families of

Flash memory microcontrollers. The PICkit 2 Starter Kit

includes a prototyping development board, twelve

sequential lessons, software and HI-TECH’s PICC™

Lite C compiler, and is designed to help get up to speed

quickly using PIC^®microcontrollers. The kit provides

everything needed to program, evaluate and develop

applications using Microchip’s powerful, mid-range

Flash memory family of microcontrollers.

In addition to the PICDEM™ and dsPICDEM™ demon-

stration/development board series of circuits, Microchip

has a line of evaluation kits and demonstration software

®

for analog filter design, KEELOQ security ICs, CAN,

IrDA^®, PowerSmart battery management, SEEVAL^®

evaluation system, Sigma-Delta ADC, flow rate

sensing, plus many more.

Check the Microchip web page (www.microchip.com)

for the complete list of demonstration, development

and evaluation kits.

DS70283B-page 236

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

23.0 ELECTRICAL CHARACTERISTICS

This section provides an overview of dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 electrical characteristics.

Additional information will be provided in future revisions of this document as it becomes available.

Absolute maximum ratings for the dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 family are listed below. Exposure

to these maximum rating conditions for extended periods may affect device reliability. Functional operation of the device

at these or any other conditions above the parameters indicated in the operation listings of this specification is not

implied.

(1)

Absolute Maximum Ratings

Ambient temperature under bias.............................................................................................................-40°C to +125°C

Storage temperature .............................................................................................................................. -65°C to +150°C

Voltage on VDD with respect to VSS ......................................................................................................... -0.3V to +4.0V

Voltage on any combined analog and digital pin and MCLR, with respect to VSS ......................... -0.3V to (VDD + 0.3V)

Voltage on any digital-only pin with respect to VSS .................................................................................. -0.3V to +5.6V

Voltage on VDDCORE with respect to VSS ................................................................................................ 2.25V to 2.75V

Maximum current out of VSS pin ...........................................................................................................................300 mA

Maximum current into VDD pin⁽²⁾...........................................................................................................................250 mA

Maximum output current sunk by any I/O pin⁽³⁾........................................................................................................4 mA

Maximum output current sourced by any I/O pin⁽³⁾...................................................................................................4 mA

Maximum current sunk by all ports .......................................................................................................................200 mA

Maximum current sourced by all ports⁽²⁾...............................................................................................................200 mA

Note 1: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the

device. This is a stress rating only, and functional operation of the device at those or any other conditions

above those indicated in the operation listings of this specification is not implied. Exposure to maximum

rating conditions for extended periods may affect device reliability.

2: Maximum allowable current is a function of device maximum power dissipation (see Table 23-2).

3: Exceptions are CLKOUT, which is able to sink/source 25 mA, and the VREF+, VREF-, SCLx, SDAx, PGCx

and PGDx pins, which are able to sink/source 12 mA.

Preliminary

DS70283B-page 237

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

23.1 DC Characteristics

TABLE 23-1: OPERATING MIPS VS. VOLTAGE

Max MIPS

VDD Range

(in Volts)

Temp Range

(in °C)

Characteristic

dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304

3.0-3.6V

-40°C to +85°C

-40°C to +125°C

40

35

TABLE 23-2: THERMAL OPERATING CONDITIONS

Rating

Symbol

Min

Typ

Max

Unit

Industrial Temperature Devices

Operating Junction Temperature Range

Operating Ambient Temperature Range

Extended Temperature Devices

TJ

TA

-40

—

+125

+85

°C

Operating Junction Temperature Range

Operating Ambient Temperature Range

TJ

TA

-40

—

+140

+125

°C

Power Dissipation:

Internal chip power dissipation:

PINT = VDD x (IDD – Σ IOH)

PD

PINT + PI/O

W

I/O Pin Power Dissipation:

I/O = Σ ({VDD – VOH} x IOH) + Σ (VOL x IOL)

Maximum Allowed Power Dissipation

PDMAX

(TJ – TA)/θJA

TABLE 23-3: THERMAL PACKAGING CHARACTERISTICS

Characteristic

Symbol

Typ

Max

Unit

Notes

Package Thermal Resistance, 44-pin QFN

Package Thermal Resistance, 44-pin TFQP

Package Thermal Resistance, 28-pin SPDIP

Package Thermal Resistance, 28-pin SOIC

Package Thermal Resistance, 28-pin QFN-S

θJA

62.4

60

—

°C/W

1

108

80.2

32

Note 1: Junction to ambient thermal resistance, Theta-JA (θJA) numbers are achieved by package simulations.

DS70283B-page 238

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-4: DC TEMPERATURE AND VOLTAGE SPECIFICATIONS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

DC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min

Typ⁽¹⁾

Max Units

Conditions

Operating Voltage

DC10 Supply Voltage

VDD

3.0

1.1

—

1.3

—

3.6

1.8

V

Industrial and Extended

DC12

DC16

VDR

RAM Data Retention Voltage⁽²⁾

VPOR

VDD Start Voltage

to ensure internal

VSS

Power-on Reset signal

DC17

DC18

SVDD

VDD Rise Rate

to ensure internal

Power-on Reset signal

VDD Core⁽³⁾

0.03

2.25

—

V/ms 0-3.0V in 0.1s

VCORE

2.75

V

Voltage is dependent on

Internal regulator voltage

load, temperature and

VDD

Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

2: This is the limit to which VDD may be lowered without losing RAM data.

3: These parameters are characterized but not tested in manufacturing.

Preliminary

DS70283B-page 239

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-5: DC CHARACTERISTICS: OPERATING CURRENT (IDD)

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

DC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Parameter

Typical⁽¹⁾

Max

Units

Conditions

No.

Operating Current (IDD)⁽²⁾

DC20d

DC20a

DC20b

DC20c

DC21d

DC21a

DC21b

DC21c

DC22d

DC22a

DC22b

DC22c

DC23d

DC23a

DC23b

DC23c

DC24d

DC24a

DC24b

DC24c

24

27

30

37

32

33

35

38

39

47

48

56

54

30

35

40

45

50

55

70

90

80

mA

-40°C

+25°C

+85°C

+125°C

-40°C

3.3V

10 MIPS

16 MIPS

20 MIPS

30 MIPS

+25°C

+85°C

+125°C

-40°C

+25°C

+85°C

+125°C

-40°C

+25°C

+85°C

+125°C

-40°C

+25°C

+85°C

+125°C

3.3V

40 MIPS

35 MIPS

Note 1: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated.

2: The supply current is mainly a function of the operating voltage and frequency. Other factors, such as I/O

pin loading and switching rate, oscillator type, internal code execution pattern and temperature, also have

an impact on the current consumption. The test conditions for all IDD measurements are as follows: OSC1

driven with external square wave from rail to rail. All I/O pins are configured as inputs and pulled to VSS.

MCLR = VDD, WDT and FSCM are disabled. CPU, SRAM, program memory and data memory are

operational. No peripheral modules are operating; however, every peripheral is being clocked (PMD bits

are all zeroed).

DS70283B-page 240

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-6: DC CHARACTERISTICS: IDLE CURRENT (IIDLE)

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

DC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Parameter

Typical⁽¹⁾

Max

Units

Conditions

No.

Idle Current (IIDLE): Core OFF Clock ON Base Current⁽²⁾

DC40d

DC40a

DC40b

DC40c

DC41d

DC41a

DC41b

DC41c

DC42d

DC42a

DC42b

DC42c

DC43d

DC43a

DC43b

DC43c

DC44d

DC44a

DC44b

DC44c

3

25

mA

-40°C

+25°C

+85°C

+125°C

-40°C

10 MIPS

16 MIPS

20 MIPS

30 MIPS

3.3V

3

4

+25°C

+85°C

+125°C

-40°C

5

6

+25°C

+85°C

+125°C

-40°C

3.3V

7

9

+25°C

+85°C

+125°C

-40°C

9

10

16

10

+25°C

+85°C

+125°C

3.3V

40 MIPS

35 MIPS

Note 1: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated.

2: Base IIDLE current is measured with core off, clock on and all modules turned off. Peripheral Module

Disable SFR registers are zeroed. All I/O pins are configured as inputs and pulled to VSS.

Preliminary

DS70283B-page 241

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-7: DC CHARACTERISTICS: POWER-DOWN CURRENT (IPD)

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

DC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Parameter

Typical⁽¹⁾

Max

Units

Conditions

No.

Power-Down Current (IPD)⁽²⁾

DC60d

DC60a

DC60b

DC60c

DC61d

DC61a

DC61b

DC61c

55

63

85

146

8

500

1

μA

mA

μA

-40°C

+25°C

+85°C

+125°C

-40°C

3.3V

Base Power-Down Current^(3,4)

13

10

12

13

15

+25°C

+85°C

+125°C

(3)

Watchdog Timer Current: ΔIWDT

20

25

Note 1: Data in the Typical column is at 3.3V, 25°C unless otherwise stated.

2: Base IPD is measured with all peripherals and clocks shut down. All I/Os are configured as inputs and

pulled to VSS. WDT, etc., are all switched off.

3: The Δ current is the additional current consumed when the module is enabled. This current should be

added to the base IPD current.

4: These currents are measured on the device containing the most memory in this family.

TABLE 23-8: DC CHARACTERISTICS: DOZE CURRENT (IDOZE)

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

DC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Doze

Ratio

Parameter No.

Typical⁽¹⁾

Max

Units

Conditions

DC73a

DC73f

DC73g

DC70a

DC70f

DC70g

DC71a

DC71f

DC71g

DC72a

DC72f

DC72g

25

23

42

26

25

41

25

24

42

26

25

32

27

26

47

27

48

28

49

29

28

1:2

1:64

1:128

1:2

mA

-40°C

+25°C

+85°C

+125°C

3.3V

40 MIPS

35 MIPS

1:64

1:128

1:2

1:64

1:128

1:2

1:64

1:128

Note 1: Data in the Typical column is at 3.3V, 25°C unless otherwise stated.

DS70283B-page 242

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-9: DC CHARACTERISTICS: I/O PIN INPUT SPECIFICATIONS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

DC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Input Low Voltage

Min

Typ⁽¹⁾

Max

Units

Conditions

VIL

DI10

I/O pins

VSS

—

0.2 VDD

0.3 VDD

0.2 VDD

V

DI15

DI16

DI17

DI18

DI19

MCLR

OSC1 (XT mode)

OSC1 (HS mode)

SDAx, SCLx

Input High Voltage

SMbus disabled

SMbus enabled

VIH

DI20

I/O pins:

with analog functions

digital-only

0.8 VDD

—

VDD

5.5

V

DI25

DI26

DI27

DI28

DI29

MCLR

0.8 VDD

0.7 VDD

0.8 VDD

—

VDD

V

OSC1 (XT mode)

OSC1 (HS mode)

SDAx, SCLx

SMbus disabled

SMbus enabled

SDAx, SCLx

ICNPU

IIL

CNx Pull-up Current

DI30

50

250

400

μA VDD = 3.3V, VPIN = VSS

Input Leakage Current⁽²⁾⁽³⁾

DI50

DI51

I/O ports

—

±2

±1

μA VSS ≤ VPIN ≤ VDD,

Pin at high-impedance

Analog Input Pins

μA VSS ≤ VPIN ≤ VDD, Pin at

high-impedance,

40°C ≤ TA ≤ +85°C

DI51a

DI51b

DI51c

—

±2

±3.5

±8

μA Analog pins shared with

external reference pins,

40°C ≤ TA ≤ +85°C

μA VSS ≤ VPIN ≤ VDD, Pin at

high-impedance,

-40°C ≤ TA ≤ +125°C

μA Analog pins shared with

external reference pins,

-40°C ≤ TA ≤ +125°C

DI55

DI56

MCLR

OSC1

—

±2

μA

VSS ≤ VPIN ≤ VDD

μA VSS ≤ VPIN ≤ VDD,

XT and HS modes

Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

2: The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified

levels represent normal operating conditions. Higher leakage current may be measured at different input

voltages.

3: Negative current is defined as current sourced by the pin.

Preliminary

DS70283B-page 243

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-10: DC CHARACTERISTICS: I/O PIN OUTPUT SPECIFICATIONS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

DC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min

Typ

Max Units

Conditions

VOL

Output Low Voltage

I/O ports

DO10

DO16

—

0.4

V

IOL = 2 mA, VDD = 3.3V

OSC2/CLKO

VOH

Output High Voltage

I/O ports

DO20

DO26

2.40

2.41

—

V

IOH = -2.3 mA, VDD = 3.3V

IOH = -1.3 mA, VDD = 3.3V

OSC2/CLKO

TABLE 23-11: ELECTRICAL CHARACTERISTICS: BOR

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

DC CHARACTERISTICS

Param

Symbol

No.

Characteristic

Min⁽¹⁾Typ

2.40

Max

Units

Conditions

BO10

VBOR

BOR Event on VDD transition

high-to-low

—

2.55

V

BOR event is tied to VDD core voltage

decrease

Note 1: Parameters are for design guidance only and are not tested in manufacturing.

DS70283B-page 244

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-12: DC CHARACTERISTICS: PROGRAM MEMORY

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

DC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min Typ⁽¹⁾

Max

Units

Conditions

Program Flash Memory

Cell Endurance

D130

D131

EP

10,000

VMIN

—

E/W -40°C to +125°C

VPR

VDD for Read

3.6

V

VMIN = Minimum operating

voltage

D132B VPEW

VDD for Self-Timed Write

Characteristic Retention

VMIN

20

—

10

3.6

—

V

VMIN = Minimum operating

voltage

D134

D135

TRETD

IDDP

Year Provided no other specifications

are violated, -40°C to +125°C

Supply Current during

Programming

—

mA

D136

D137

D138

TRW

TPE

Row Write Time

—

20

1.6

20

—

40

ms

μs

Page Erase Time

Word Write Cycle Time

TWW

Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

TABLE 23-13: INTERNAL VOLTAGE REGULATOR SPECIFICATIONS

Operating Conditions: -40°C < TA < +85°C (unless otherwise stated)

Param

No.

Symbol

Characteristics

Min

Typ

Max

Units

Comments

CEFC

External Filter Capacitor

Value

1

10

—

μF

Capacitor must be low

series resistance

(< 5 ohms)

Preliminary

DS70283B-page 245

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

23.2 AC Characteristics and Timing

Parameters

This section defines dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 AC characteristics and timing

parameters.

TABLE 23-14: TEMPERATURE AND VOLTAGE SPECIFICATIONS – AC

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Operating voltage VDD range as described in Section 23.0 “Electrical

Characteristics”.

FIGURE 23-1:

LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS

Load Condition 1 – for all pins except OSC2

VDD/2

Load Condition 2 – for OSC2

CL

RL

VSS

CL

RL = 464Ω

CL = 50 pF for all pins except OSC2

15 pF for OSC2 output

VSS

TABLE 23-15: CAPACITIVE LOADING REQUIREMENTS ON OUTPUT PINS

Param

Symbol

Characteristic

Min

Typ

Max Units

Conditions

No.

DO50 COSC2

OSC2/SOSC2 pin

—

15

pF In XT and HS modes when

external clock is used to drive

OSC1

DO56 CIO

DO58 CB

All I/O pins and OSC2

SCLx, SDAx

—

50

pF EC mode

pF In I²C™ mode

400

DS70283B-page 246

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-2:

EXTERNAL CLOCK TIMING

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

OSC1

CLKO

OS20

OS30 OS30

OS25

OS31 OS31

OS41

OS40

TABLE 23-16: EXTERNAL CLOCK TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symb

No.

Characteristic

Min

Typ⁽¹⁾

Max

Units

Conditions

OS10

FIN

External CLKI Frequency

(External clocks allowed only

in EC and ECPLL modes)

DC

—

40

MHz EC

Oscillator Crystal Frequency

3.5

10

—

10

40

33

MHz XT

MHz HS

kHz SOSC

OS20

OS25

OS30

TOSC

TCY

TOSC = 1/FOSC

Instruction Cycle Time⁽²⁾

12.5

25

—

DC

ns

TosL, External Clock in (OSC1)

TosH High or Low Time

0.375 x TOSC

0.625 x TOSC

ns

EC

OS31

TosR, External Clock in (OSC1)

TosF Rise or Fall Time

—

20

ns

OS40

OS41

TckR CLKO Rise Time⁽³⁾

—

5.2

—

ns

TckF

CLKO Fall Time⁽³⁾

Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

2: Instruction cycle period (TCY) equals two times the input oscillator time-base period. All specified values

are based on characterization data for that particular oscillator type under standard operating conditions

with the device executing code. Exceeding these specified limits may result in an unstable oscillator

operation and/or higher than expected current consumption. All devices are tested to operate at “min.”

values with an external clock applied to the OSC1/CLKI pin. When an external clock input is used, the

“max.” cycle time limit is “DC” (no clock) for all devices.

3: Measurements are taken in EC mode. The CLKO signal is measured on the OSC2 pin.

Preliminary

DS70283B-page 247

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-17: PLL CLOCK TIMING SPECIFICATIONS (VDD = 3.0V TO 3.6V)

Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)

AC CHARACTERISTICS

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

Param

Symbol

No.

Characteristic

Min

Typ⁽¹⁾

Max

Units

Conditions

OS50

FPLLI

PLL Voltage Controlled

Oscillator (VCO) Input

Frequency Range

0.8

—

8

MHz ECPLL, XTPLL modes

OS51

FSYS

On-Chip VCO System

Frequency

100

—

200

MHz

mS

OS52

OS53

TLOCK

DCLK

PLL Start-up Time (Lock Time)

CLKO Stability (Jitter)

0.9

-3

1.5

0.5

3.1

3

%

Measured over 100 ms

period

Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only

and are not tested.

TABLE 23-18: AC CHARACTERISTICS: INTERNAL RC ACCURACY

Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)

AC CHARACTERISTICS

Operating temperature

^-40°C≤ TA ≤ +85°C for industrial

Param

No.

Characteristic

Min

Typ

Max

Units

Conditions

Internal FRC Accuracy @ FRC Frequency = 7.37 MHz^(1,2)

F20

FRC

-2

-5

—

+2

+5

%

-40°C ≤ TA ≤ +85°C

-40°C ≤ TA ≤ +125°C

VDD = 3.0-3.6V

Note 1: Frequency calibrated at 25°C and 3.3V. TUN bits can be used to compensate for temperature drift.

2: FRC is set to initial frequency of 7.37 MHz (±2%) at 25°C.

TABLE 23-19: INTERNAL RC ACCURACY

Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)

AC CHARACTERISTICS

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Characteristic

Min

Typ

Max

Units

Conditions

LPRC @ 32.768 kHz⁽¹⁾

F21

LPRC

-20

-70

±6

—

+20

%

-40°C ≤ TA ≤ +85°C

-40°C ≤ TA ≤ +125°C

VDD = 3.0-3.6V

Note 1: Change of LPRC frequency as VDD changes.

DS70283B-page 248

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-3:

I/O TIMING CHARACTERISTICS

I/O Pin

(Input)

DI35

DI40

I/O Pin

(Output)

New Value

Old Value

DO31

DO32

Note: Refer to Figure 23-1 for load conditions.

TABLE 23-20: I/O TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic

Min

Typ⁽¹⁾

Max

Units

Conditions

DO31

DO32

DI35

TIOR

TIOF

TINP

TRBP

Port Output Rise Time

—

20

2

10

—

25

—

ns

—

Port Output Fall Time

INTx Pin High or Low Time (output)

CNx High or Low Time (input)

ns

DI40

TCY

Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

Preliminary

DS70283B-page 249

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-4:

RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP

TIMER TIMING CHARACTERISTICS

VDD

SY12

MCLR

SY10

Internal

POR

SY11

PWRT

Time-out

SY30

OSC

Time-out

Internal

Reset

Watchdog

Timer

Reset

SY20

SY13

I/O Pins

SY35

FSCM

Delay

Note: Refer to Figure 23-1 for load conditions.

DS70283B-page 250

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-21: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER

TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic⁽¹⁾

Min

Typ⁽²⁾

Max Units

Conditions

SY10

SY11

TMCL

MCLR Pulse Width (low)

Power-up Timer Period

2

—

μs

-40°C to +85°C

TPWRT

—

2

4

ms

-40°C to +85°C

User programmable

8

16

32

64

128

SY12

SY13

TPOR

TIOZ

Power-on Reset Delay

3

10

30

μs

-40°C to +85°C

I/O High-Impedance from MCLR

Low or Watchdog Timer Reset

0.68

0.72

1.2

SY20

TWDT1

Watchdog Timer Time-out Period

(No Prescaler)

1.7

2.1

2.6

ms

VDD = 3V, -40°C to +85°C

SY30

SY35

TOST

Oscillator Start-up Time

—

1024 TOSC

500

—

TOSC = OSC1 period

-40°C to +85°C

TFSCM

Fail-Safe Clock Monitor Delay

900

μs

Note 1: These parameters are characterized but not tested in manufacturing.

2: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

Preliminary

DS70283B-page 251

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-5:

TIMER1, 2 AND 3 EXTERNAL CLOCK TIMING CHARACTERISTICS

TxCK

Tx11

Tx10

Tx15

Tx20

OS60

TMRx

Note: Refer to Figure 23-1 for load conditions.

TABLE 23-22: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS⁽¹⁾

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic

Min

Typ

Max Units

Conditions

TA10

TA11

TA15

TTXH

TTXL

TTXP

TxCK High Time

TxCK Low Time

Synchronous,

no prescaler

0.5 TCY + 20

—

ns

Must also meet

parameter TA15

Synchronous,

with prescaler

10

—

Asynchronous

10

—

ns

Synchronous,

no prescaler

0.5 TCY + 20

Must also meet

parameter TA15

Synchronous,

with prescaler

10

—

ns

Asynchronous

10

—

ns

TxCK Input Period Synchronous,

no prescaler

TCY + 40

Synchronous,

with prescaler

Greater of:

20 ns or

—

N = prescale

value

(TCY + 40)/N

(1, 8, 64, 256)

Asynchronous

20

—

ns

OS60

TA20

Ft1

SOSC1/T1CK Oscillator Input

frequency Range (oscillator enabled

by setting bit TCS (T1CON<1>))

DC

50

kHz

TCKEXTMRL Delay from External TxCK Clock

Edge to Timer Increment

0.5 TCY

1.5

TCY

—

Note 1: Timer1 is a Type A.

DS70283B-page 252

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-23: TIMER2 EXTERNAL CLOCK TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

TtxH

Characteristic

Min

Typ

Max

Units

Conditions

TB10

TxCK High Time Synchronous, 0.5 TCY + 20

no prescaler

—

ns

Must also meet

parameter TB15

Synchronous,

with prescaler

10

—

ns

TB11

TB15

TtxL

TtxP

TxCK Low Time

Synchronous, 0.5 TCY + 20

no prescaler

Must also meet

parameter TB15

Synchronous,

with prescaler

10

TxCK Input

Period

Synchronous,

no prescaler

TCY + 40

N = prescale

value

(1, 8, 64, 256)

Synchronous,

with prescaler

Greater of:

20 ns or

(TCY + 40)/N

TB20

TCKEXT-

MRL

Delay from External TxCK Clock

Edge to Timer Increment

0.5 TCY

—

1.5 TCY

—

TABLE 23-24: TIMER3 EXTERNAL CLOCK TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic

Min

Typ

Max Units

Conditions

TC10

TC11

TC15

TtxH

TtxL

TtxP

TxCK High Time

TxCK Low Time

Synchronous

0.5 TCY + 20

—

ns

Must also meet

parameter TC15

0.5 TCY + 20

TCY + 40

—

Must also meet

parameter TC15

TxCK Input Period Synchronous,

no prescaler

N = prescale

value

(1, 8, 64, 256)

Synchronous,

with prescaler

Greater of:

20 ns or

(TCY + 40)/N

TC20

TCKEXT-

MRL

Delay from External TxCK Clock

Edge to Timer Increment

0.5 TCY

—

1.5

TCY

—

Preliminary

DS70283B-page 253

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-6:

TIMERQ (QEI MODULE) EXTERNAL CLOCK TIMING CHARACTERISTICS

QEB

TQ11

TQ10

TQ15

TQ20

POSCNT

TABLE 23-25: QEI MODULE EXTERNAL CLOCK TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic⁽¹⁾

Min

Typ

Max

Units

Conditions

TQ10 TtQH

TQ11 TtQL

TQ15 TtQP

TQCK High Time Synchronous,

with prescaler

TCY + 20

—

ns

Must also meet

parameter TQ15

TQCK Low Time

Synchronous,

with prescaler

TCY + 20

—

ns

—

Must also meet

parameter TQ15

TQCP Input

Period

Synchronous, 2 * TCY + 40

with prescaler

—

TQ20

TCKEXTMRL Delay from External TxCK Clock

Edge to Timer Increment

0.5 TCY

1.5

TCY

—

Note 1: These parameters are characterized but not tested in manufacturing.

DS70283B-page 254

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-7:

INPUT CAPTURE (CAPx) TIMING CHARACTERISTICS

ICx

IC10

IC11

IC15

Note: Refer to Figure 23-1 for load conditions.

TABLE 23-26: INPUT CAPTURE TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic⁽¹⁾

Min

Max

Units

Conditions

IC10

IC11

IC15

TccL

TccH

TccP

ICx Input Low Time No Prescaler

With Prescaler

0.5 TCY + 20

10

—

ns

ICx Input High Time No Prescaler

With Prescaler

0.5 TCY + 20

10

ICx Input Period

(TCY + 40)/N

N = prescale

value (1, 4, 16)

Note 1: These parameters are characterized but not tested in manufacturing.

FIGURE 23-8:

OUTPUT COMPARE MODULE (OCx) TIMING CHARACTERISTICS

OCx

(Output Compare

or PWM Mode)

OC10

OC11

Note: Refer to Figure 23-1 for load conditions.

TABLE 23-27: OUTPUT COMPARE MODULE TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

AC CHARACTERISTICS

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

Param

Symbol

No.

Characteristic⁽¹⁾

Min

Typ

Max

Units

Conditions

OC10 TccF

OC11 TccR

OCx Output Fall Time

OCx Output Rise Time

—

ns

See parameter D032

See parameter D031

Note 1: These parameters are characterized but not tested in manufacturing.

Preliminary

DS70283B-page 255

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-9:

OC/PWM MODULE TIMING CHARACTERISTICS

OC20

OCFA

OC15

OCx

TABLE 23-28: SIMPLE OC/PWM MODE TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic⁽¹⁾

Min

Typ

Max

Units

Conditions

OC15

TFD

Fault Input to PWM I/O

Change

—

50

ns

—

OC20

TFLT

Fault Input Pulse Width

50

—

ns

—

Note 1: These parameters are characterized but not tested in manufacturing.

DS70283B-page 256

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-10:

MOTOR CONTROL PWM MODULE FAULT TIMING CHARACTERISTICS

MP30

FLTA

MP20

PWMx

FIGURE 23-11:

MOTOR CONTROL PWM MODULE TIMING CHARACTERISTICS

MP11 MP10

PWMx

Note: Refer to Figure 23-1 for load conditions.

TABLE 23-29: MOTOR CONTROL PWM MODULE TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic⁽¹⁾

Min

Typ

Max

Units

Conditions

MP10

MP11

TFPWM

TRPWM

TFD

PWM Output Fall Time

PWM Output Rise Time

—

50

ns

See parameter D032

See parameter D031

—

Fault Input ↓ to PWM

I/O Change

MP20

MP30

TFH

Minimum Pulse Width

50

—

ns

—

Note 1: These parameters are characterized but not tested in manufacturing.

Preliminary

DS70283B-page 257

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-12:

QEA/QEB INPUT CHARACTERISTICS

TQ36

QEA

(input)

TQ30

TQ31

TQ35

QEB

(input)

TQ41

TQ40

TQ30

TQ31

TQ35

QEB

Internal

TABLE 23-30: QUADRATURE DECODER TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic⁽¹⁾

Typ⁽²⁾

Max

Units

Conditions

TQ30

TQ31

TQ35

TQ36

TQ40

TQUL

Quadrature Input Low Time

Quadrature Input High Time

Quadrature Input Period

Quadrature Phase Period

6 TCY

—

ns

—

TQUH

TQUIN

TQUP

TQUFL

12 TCY

3 TCY

Filter Time to Recognize Low,

with Digital Filter

3 * N * TCY

N = 1, 2, 4, 16, 32, 64,

128 and 256 (Note 3)

TQ41

TQUFH

Filter Time to Recognize High,

with Digital Filter

3 * N * TCY

—

ns

N = 1, 2, 4, 16, 32, 64,

128 and 256 (Note 3)

Note 1: These parameters are characterized but not tested in manufacturing.

2: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only

and are not tested.

3: N = Index Channel Digital Filter Clock Divide Select bits. Refer to Section 15. “Quadrature Encoder

Interface (QEI)” in the “dsPIC33F Family Reference Manual”. Please see the Microchip web site for the

latest dsPIC33F Family Reference Manual sections.

DS70283B-page 258

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-13:

QEI MODULE INDEX PULSE TIMING CHARACTERISTICS

QEA

(input)

QEB

(input)

Ungated

Index

TQ50

TQ51

Index Internal

Position

TQ55

Counter Reset

TABLE 23-31: QEI INDEX PULSE TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic⁽¹⁾

Min

Max

Units

Conditions

TQ50

TQ51

TQ55

TqIL

Filter Time to Recognize Low,

with Digital Filter

3 * N * TCY

—

ns

N = 1, 2, 4, 16, 32, 64,

128 and 256 (Note 2)

TqiH

Tqidxr

Filter Time to Recognize High,

with Digital Filter

3 * N * TCY

3 TCY

—

ns

N = 1, 2, 4, 16, 32, 64,

128 and 256 (Note 2)

Index Pulse Recognized to Position

Counter Reset (ungated index)

—

Note 1: These parameters are characterized but not tested in manufacturing.

2: Alignment of index pulses to QEA and QEB is shown for position counter Reset timing only. Shown for

forward direction only (QEA leads QEB). Same timing applies for reverse direction (QEA lags QEB) but

index pulse recognition occurs on falling edge.

Preliminary

DS70283B-page 259

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-14:

SPIx MODULE MASTER MODE (CKE = 0) TIMING CHARACTERISTICS

SCKx

(CKP = 0)

SP11

SP10

SP21

SP20

SCKx

(CKP = 1)

SP35

SP31

SP21

LSb

Bit 14 - - - - - -1

MSb

SDOx

SDIx

SP30

MSb In

SP40

LSb In

Bit 14 - - - -1

SP41

Note: Refer to Figure 23-1 for load conditions.

TABLE 23-32: SPIx MASTER MODE (CKE = 0) TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic⁽¹⁾

Min

Typ⁽²⁾

Max

Units

Conditions

See Note 3

SP10

SP11

SP20

TscL

TscH

TscF

SCKx Output Low Time

SCKx Output High Time

SCKx Output Fall Time

TCY/2

—

ns

See Note 3

See parameter D032

and Note 4

SP21

SP30

SP31

SP35

SP40

SP41

TscR

TdoF

TdoR

SCKx Output Rise Time

—

23

30

—

6

—

20

—

ns

See parameter D031

and Note 4

SDOx Data Output Fall Time

SDOx Data Output Rise Time

See parameter D032

and Note 4

See parameter D031

and Note 4

TscH2doV, SDOx Data Output Valid after

TscL2doV SCKx Edge

—

TdiV2scH, Setup Time of SDIx Data Input

—

TdiV2scL

TscH2diL, Hold Time of SDIx Data Input

TscL2diL to SCKx Edge

to SCKx Edge

Note 1: These parameters are characterized but not tested in manufacturing.

2: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

3: The minimum clock period for SCKx is 100 ns. Therefore, the clock generated in Master mode must not

violate this specification.

4: Assumes 50 pF load on all SPIx pins.

DS70283B-page 260

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-15:

SPIx MODULE MASTER MODE (CKE = 1) TIMING CHARACTERISTICS

SP36

SCKX

(CKP = 0)

SP11

SP10

SP21

SP20

SP21

SCKX

(CKP = 1)

SP35

Bit 14 - - - - - -1

LSb

MSb

SP40

SDOX

SP30,SP31

Bit 14 - - - -1

SDIX

MSb In

SP41

Note: Refer to Figure 23-1 for load conditions.

LSb In

TABLE 23-33: SPIx MODULE MASTER MODE (CKE = 1) TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

TscL

Characteristic⁽¹⁾

Min

Typ⁽²⁾

Max

Units

Conditions

See Note 3

SP10

SP11

SP20

SCKx Output Low Time

SCKx Output High Time

SCKx Output Fall Time

TCY/2

—

ns

TscH

TscF

See Note 3

See parameter D032

and Note 4

SP21

SP30

SP31

SP35

SP36

SP40

SP41

TscR

TdoF

TdoR

SCKx Output Rise Time

—

30

23

30

—

6

—

20

—

ns

See parameter D031

and Note 4

SDOx Data Output Fall Time

SDOx Data Output Rise Time

See parameter D032

and Note 4

See parameter D031

and Note 4

TscH2doV, SDOx Data Output Valid after

TscL2doV SCKx Edge

—

TdoV2sc,

TdoV2scL First SCKx Edge

SDOx Data Output Setup to

—

TdiV2scH, Setup Time of SDIx Data

TdiV2scL

TscH2diL, Hold Time of SDIx Data Input

TscL2diL to SCKx Edge

Input to SCKx Edge

Note 1: These parameters are characterized but not tested in manufacturing.

2: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

3: The minimum clock period for SCKx is 100 ns. The clock generated in Master mode must not violate this

specification.

4: Assumes 50 pF load on all SPIx pins.

Preliminary

DS70283B-page 261

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-16:

SPIx MODULE SLAVE MODE (CKE = 0) TIMING CHARACTERISTICS

SSX

SP52

SP50

SCKX

(CKP =

0

)

SP71

SP70

SP72

SP73

SP72

SCKX

(CKP =

1

SP73

LSb

SP35

MSb

SDOX

SDIX

Bit 14 - - - - - -1

SP51

SP30,SP31

Bit 14 - - - -1

MSb In

SP41

LSb In

SP40

Note: Refer to Figure 23-1 for load conditions.

TABLE 23-34: SPIx MODULE SLAVE MODE (CKE = 0) TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

TscL

Characteristic⁽¹⁾

Min

Typ⁽²⁾Max Units

Conditions

SP70

SP71

SP72

SP73

SP30

SCKx Input Low Time

SCKx Input High Time

SCKx Input Fall Time

SCKx Input Rise Time

SDOx Data Output Fall Time

30

—

10

—

25

—

ns

—

TscH

TscF

TscR

TdoF

See Note 3

See parameter D032

and Note 3

SP31

SP35

SP40

SP41

SP50

SP51

TdoR

SDOx Data Output Rise Time

—

30

—

50

ns

See parameter D031

and Note 3

TscH2doV, SDOx Data Output Valid after

TscL2doV SCKx Edge

—

TdiV2scH, Setup Time of SDIx Data Input

TdiV2scL to SCKx Edge

20

120

10

—

TscH2diL, Hold Time of SDIx Data Input to

TscL2diL

—

SCKx Edge

TssL2scH, SSx ↓ to SCKx ↑ or SCKx Input

TssL2scL

See Note 3

TssH2doZ SSx ↑ to SDOx Output

High-Impedance

SP52

TscH2ssH SSx after SCKx Edge

TscL2ssH

1.5 TCY +40

—

ns

—

Note 1: These parameters are characterized but not tested in manufacturing.

2: Data in “Typ” column is at 5V, 25°C unless otherwise stated.

3: Assumes 50 pF load on all SPIx pins.

DS70283B-page 262

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-17:

SPIx MODULE SLAVE MODE (CKE = 1) TIMING CHARACTERISTICS

SP60

SSx

SP52

SP50

SCKx

(CKP = 0)

SP71

SP70

SP72

SP73

SCKx

(CKP = 1)

SP35

SP72

LSb

SP52

Bit 14 - - - - - -1

MSb

SDOx

SDIx

SP30,SP31

Bit 14 - - - -1

SP51

MSb In

SP41

LSb In

SP40

Note: Refer to Figure 23-1 for load conditions.

Preliminary

DS70283B-page 263

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-35: SPIx MODULE SLAVE MODE (CKE = 1) TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

TscL

Characteristic⁽¹⁾

Min

Typ⁽²⁾

Max

Units

Conditions

SP70

SP71

SP72

SP73

SP30

SCKx Input Low Time

SCKx Input High Time

SCKx Input Fall Time

SCKx Input Rise Time

SDOx Data Output Fall Time

30

—

10

—

25

—

ns

—

TscH

TscF

TscR

TdoF

See Note 3

See parameter

D032 and Note 3

SP31

SP35

SP40

SP41

SP50

SP51

SP52

SP60

TdoR

SDOx Data Output Rise Time

—

30

—

50

—

50

ns

See parameter

D031 and Note 3

TscH2doV, SDOx Data Output Valid after

TscL2doV SCKx Edge

—

TdiV2scH, Setup Time of SDIx Data Input

20

—

TdiV2scL

TscH2diL, Hold Time of SDIx Data Input

TscL2diL to SCKx Edge

TssL2scH, SSx ↓ to SCKx ↓ or SCKx ↑

TssL2scL Input

to SCKx Edge

20

—

120

See Note 4

TssH2doZ SSx ↑ to SDOX Output

10

1.5 TCY + 40

—

High-Impedance

TscH2ssH SSx ↑ after SCKx Edge

TscL2ssH

—

TssL2doV SDOx Data Output Valid after

SSx Edge

Note 1: These parameters are characterized but not tested in manufacturing.

2: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.

3: The minimum clock period for SCKx is 100 ns. The clock generated in Master mode must not violate this

specification.

4: Assumes 50 pF load on all SPIx pins.

DS70283B-page 264

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-18:

I2Cx BUS START/STOP BITS TIMING CHARACTERISTICS (MASTER MODE)

SCLx

SDAx

IM31

IM34

IM30

IM33

Stop

Condition

Start

Condition

Note: Refer to Figure 23-1 for load conditions.

FIGURE 23-19:

I2Cx BUS DATA TIMING CHARACTERISTICS (MASTER MODE)

IM20

IM21

IM11

IM10

SCLx

IM11

IM26

IM10

IM33

IM25

SDAx

In

IM45

IM40

SDAx

Out

Note: Refer to Figure 23-1 for load conditions.

Preliminary

DS70283B-page 265

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-36: I2Cx BUS DATA TIMING REQUIREMENTS (MASTER MODE)

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min⁽¹⁾

Max

Units

Conditions

IM10

TLO:SCL Clock Low Time 100 kHz mode TCY/2 (BRG + 1)

400 kHz mode TCY/2 (BRG + 1)

—

μs

ns

μs

ns

μs

pF

—

1 MHz mode⁽²⁾TCY/2 (BRG + 1)

—

IM11

IM20

IM21

IM25

IM26

IM30

IM31

IM33

IM34

IM40

IM45

IM50

THI:SCL Clock High Time 100 kHz mode TCY/2 (BRG + 1)

400 kHz mode TCY/2 (BRG + 1)

—

1 MHz mode⁽²⁾TCY/2 (BRG + 1)

—

TF:SCL

TR:SCL

SDAx and SCLx 100 kHz mode

—

300

100

1000

300

—

CB is specified to be

from 10 to 400 pF

Fall Time

400 kHz mode

20 + 0.1 CB

1 MHz mode⁽²⁾

—

SDAx and SCLx 100 kHz mode

—

CB is specified to be

from 10 to 400 pF

Rise Time

400 kHz mode

20 + 0.1 CB

1 MHz mode⁽²⁾

—

250

100

40

0

TSU:DAT Data Input

Setup Time

100 kHz mode

400 kHz mode

1 MHz mode⁽²⁾

100 kHz mode

400 kHz mode

1 MHz mode⁽²⁾

—

THD:DAT Data Input

Hold Time

—

0

0.9

—

0.2

TSU:STA Start Condition 100 kHz mode TCY/2 (BRG + 1)

—

Only relevant for

Repeated Start

condition

Setup Time

400 kHz mode TCY/2 (BRG + 1)

—

1 MHz mode⁽²⁾TCY/2 (BRG + 1)

—

THD:STA Start Condition 100 kHz mode TCY/2 (BRG + 1)

—

After this period the

first clock pulse is

generated

Hold Time

400 kHz mode TCY/2 (BRG + 1)

—

1 MHz mode⁽²⁾TCY/2 (BRG + 1)

—

TSU:STO Stop Condition 100 kHz mode TCY/2 (BRG + 1)

—

Setup Time

400 kHz mode TCY/2 (BRG + 1)

—

1 MHz mode⁽²⁾TCY/2 (BRG + 1)

—

THD:STO Stop Condition

Hold Time

100 kHz mode TCY/2 (BRG + 1)

400 kHz mode TCY/2 (BRG + 1)

1 MHz mode⁽²⁾TCY/2 (BRG + 1)

—

TAA:SCL Output Valid

From Clock

100 kHz mode

400 kHz mode

1 MHz mode⁽²⁾

—

3500

1000

400

—

TBF:SDA Bus Free Time 100 kHz mode

400 kHz mode

4.7

1.3

0.5

—

Time the bus must be

free before a new

transmission can start

—

1 MHz mode⁽²⁾

—

CB

Bus Capacitive Loading

400

Note 1: BRG is the value of the I²C Baud Rate Generator. Refer to Section 19. “Inter-Integrated Circuit (I²C™)”

in the “dsPIC33F Family Reference Manual”. Please see the Microchip web site for the latest dsPIC33F

Family Reference Manual sections.

2: Maximum pin capacitance = 10 pF for all I2Cx pins (for 1 MHz mode only).

DS70283B-page 266

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-20:

I2Cx BUS START/STOP BITS TIMING CHARACTERISTICS (SLAVE MODE)

SCLx

SDAx

IS34

IS31

IS30

IS33

Stop

Condition

Start

Condition

FIGURE 23-21:

I2Cx BUS DATA TIMING CHARACTERISTICS (SLAVE MODE)

IS20

IS21

IS11

IS10

SCLx

IS30

IS26

IS31

IS33

IS25

SDAx

In

IS45

IS40

SDAx

Out

Preliminary

DS70283B-page 267

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-37: I2Cx BUS DATA TIMING REQUIREMENTS (SLAVE MODE)

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param. Symbol

Characteristic

Min

Max

Units

Conditions

IS10

TLO:SCL Clock Low Time 100 kHz mode

4.7

—

μs

Device must operate at a

minimum of 1.5 MHz

400 kHz mode

1.3

—

μs

Device must operate at a

minimum of 10 MHz

1 MHz mode⁽¹⁾

0.5

4.0

—

μs

—

IS11

THI:SCL Clock High Time 100 kHz mode

Device must operate at a

minimum of 1.5 MHz

400 kHz mode

0.6

—

μs

Device must operate at a

minimum of 10 MHz

1 MHz mode⁽¹⁾

0.5

—

300

100

1000

300

—

μs

ns

μs

ns

μs

pF

—

IS20

IS21

IS25

IS26

IS30

IS31

IS33

IS34

IS40

IS45

IS50

TF:SCL SDAx and SCLx 100 kHz mode

—

CB is specified to be from

10 to 400 pF

Fall Time

400 kHz mode

1 MHz mode⁽¹⁾

20 + 0.1 CB

—

TR:SCL SDAx and SCLx 100 kHz mode

CB is specified to be from

10 to 400 pF

Rise Time

400 kHz mode

1 MHz mode⁽¹⁾

20 + 0.1 CB

—

TSU:DAT Data Input

Setup Time

100 kHz mode

400 kHz mode

1 MHz mode⁽¹⁾

100 kHz mode

400 kHz mode

1 MHz mode⁽¹⁾

100 kHz mode

400 kHz mode

1 MHz mode⁽¹⁾

100 kHz mode

400 kHz mode

1 MHz mode⁽¹⁾

100 kHz mode

400 kHz mode

1 MHz mode⁽¹⁾

100 kHz mode

400 kHz mode

1 MHz mode⁽¹⁾

100 kHz mode

400 kHz mode

1 MHz mode⁽¹⁾

100 kHz mode

400 kHz mode

1 MHz mode⁽¹⁾

250

100

0

—

THD:DAT Data Input

Hold Time

—

0

0.9

0.3

—

0

TSU:STA Start Condition

Setup Time

4.7

0.6

0.25

4.0

0.6

0.25

4.7

0.6

4000

600

250

0

Only relevant for Repeated

Start condition

—

THD:STA Start Condition

Hold Time

—

After this period, the first

clock pulse is generated

—

TSU:STO Stop Condition

Setup Time

—

THD:ST Stop Condition

—

O

Hold Time

—

TAA:SCL Output Valid

From Clock

3500

1000

350

—

0

TBF:SDA Bus Free Time

4.7

1.3

0.5

—

Time the bus must be free

before a new transmission

can start

—

CB

Bus Capacitive Loading

400

—

Note 1: Maximum pin capacitance = 10 pF for all I2Cx pins (for 1 MHz mode only).

DS70283B-page 268

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-38: ADC MODULE SPECIFICATIONS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min.

Typ

Max.

Units

Conditions

Device Supply

AD01

AVDD

Module VDD Supply

Greater of

VDD – 0.3

or 3.0

—

Lesser of

VDD + 0.3

or 3.6

V

—

AD02

AVSS

Module VSS Supply

VSS – 0.3

VSS + 0.3

Reference Inputs

AD05

VREFH

Reference Voltage High

AVSS + 2.7

3.0

—

AVDD

3.6

V

See Note 1

AD05a

VREFH = AVDD

VREFL = AVSS = 0

AD06

VREFL

Reference Voltage Low

AVSS

0

—

AVDD – 2.7

0

V

See Note 1

AD06a

VREFH = AVDD

VREFL = AVSS = 0

AD07

AD08

VREF

IREF

Absolute Reference Voltage

Current Drain

2.7

—

3.6

V

VREF = VREFH - VREFL

400

—

550

10

μA ADC operating

μA ADC off

Analog Input

AD12

AD13

AD17

VINH

VINL

RIN

Input Voltage Range VINH

Input Voltage Range VINL

VINL

—

VREFH

V

This voltage reflects

Sample and Hold Channels

0, 1, 2, and 3 (CH0-CH3),

positive input

VREFL

—

AVSS + 1V

V

This voltage reflects

Sample and Hold Channels

0, 1, 2, and 3 (CH0-CH3),

negative input

Recommended Impedance

of Analog Voltage Source

—

200

Ω

10-bit ADC

12-bit ADC

Note 1: These parameters are not characterized or tested in manufacturing.

Preliminary

DS70283B-page 269

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-39: ADC MODULE SPECIFICATIONS (12-BIT MODE)

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min.

Typ

Max. Units

Conditions

ADC Accuracy (12-bit Mode) – Measurements with external VREF+/VREF-

AD20a Nr

AD21a INL

Resolution

12 data bits

—

bits

Integral Nonlinearity

-2

+2

<1

3

LSb VINL = AVSS = VREFL = 0V, AVDD

= VREFH = 3.6V

AD22a DNL

Differential Nonlinearity

Gain Error

>-1

1.25

—

1.5

1.52

—

LSb VINL = AVSS = VREFL = 0V, AVDD

= VREFH = 3.6V

AD23a

AD24a

AD25a

GERR

EOFF

—

LSb VINL = AVSS = VREFL = 0V, AVDD

= VREFH = 3.6V

Offset Error

2

LSb VINL = AVSS = VREFL = 0V, AVDD

= VREFH = 3.6V

Monotonicity

—

Guaranteed

ADC Accuracy (12-bit Mode) – Measurements with internal VREF+/VREF-

AD20a Nr

AD21a INL

AD22a DNL

Resolution

12 data bits

bits

Integral Nonlinearity

Differential Nonlinearity

Gain Error

-2

>-1

2

—

3

+2

<1

7

LSb VINL = AVSS = 0V, AVDD = 3.6V

AD23a

AD24a

AD25a

GERR

EOFF

—

Offset Error

2

3

5

Monotonicity

—

Guaranteed

Dynamic Performance (12-bit Mode)

AD30a THD

Total Harmonic Distortion

-77

59

-69

63

-61

64

dB

—

AD31a SINAD

Signal to Noise and

Distortion

AD32a SFDR

Spurious Free Dynamic

Range

63

72

74

dB

—

AD33a

FNYQ

Input Signal Bandwidth

Effective Number of Bits

—

250

—

kHz

bits

—

AD34a ENOB

10.95

11.1

DS70283B-page 270

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-40: ADC MODULE SPECIFICATIONS (10-BIT MODE)

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min.

Typ

Max. Units

Conditions

ADC Accuracy (10-bit Mode) – Measurements with external VREF+/VREF-

AD20b Nr

AD21b INL

Resolution

10 data bits

—

bits

Integral Nonlinearity

-1.5

>-1

1

+1.5

<1

6

LSb VINL = AVSS = VREFL = 0V,

AVDD = VREFH = 3.6V

AD22b DNL

Differential Nonlinearity

Gain Error

—

3

LSb VINL = AVSS = VREFL = 0V,

AVDD = VREFH = 3.6V

AD23b

AD24b

AD25b

GERR

EOFF

—

LSb VINL = AVSS = VREFL = 0V,

AVDD = VREFH = 3.6V

Offset Error

1

2

5

LSb VINL = AVSS = VREFL = 0V,

AVDD = VREFH = 3.6V

Monotonicity

—

Guaranteed

ADC Accuracy (10-bit Mode) – Measurements with internal VREF+/VREF-

AD20b Nr

AD21b INL

AD22b DNL

Resolution

10 data bits

bits

Integral Nonlinearity

Differential Nonlinearity

Gain Error

-1

>-1

1

—

5

+1

<1

6

LSb VINL = AVSS = 0V, AVDD = 3.6V

AD23b

AD24b

AD25b

GERR

EOFF

—

Offset Error

1

2

3

Monotonicity

—

Guaranteed

Dynamic Performance (10-bit Mode)

AD30b THD

Total Harmonic Distortion

—

-64

57

-67

58

dB

—

AD31b SINAD

Signal to Noise and

Distortion

AD32b SFDR

Spurious Free Dynamic

Range

—

60

62

dB

—

AD33b

FNYQ

Input Signal Bandwidth

Effective Number of Bits

—

550

9.8

kHz

bits

—

AD34b ENOB

9.1

9.7

Preliminary

DS70283B-page 271

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-22:

ADC CONVERSION (12-BIT MODE) TIMING CHARACTERISTICS

(ASAM = 0, SSRC<2:0> = 000)

AD50

ADCLK

Instruction

Execution

Set SAMP

AD61

Clear SAMP

SAMP

AD60

TSAMP

AD55

DONE

AD1IF

1

2

3

4

5

6

7

8

9

– Software sets AD1CON. SAMP to start sampling.

– Convert bit 11.

1

2

5

6

7

8

9

– Sampling starts after discharge period. TSAMP is described in

Section 28. “10/12-bit ADC without DMA” in the

“dsPIC33F Family Reference Manual”.

– Convert bit 10.

– Convert bit 1.

– Convert bit 0.

– Software clears AD1CON. SAMP to start conversion.

3

4

– One TAD for end of conversion.

– Sampling ends, conversion sequence starts.

TABLE 23-41: ADC CONVERSION (12-BIT MODE) TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

-40°C ≤ TA ≤ +125°C for Extended

AC CHARACTERISTICS

Param

Symbol

No.

Characteristic

Min.

Typ

Max.

Units

Conditions

Clock Parameters

AD50

AD51

TAD

tRC

ADC Clock Period

117.6

—

ns

ADC Internal RC Oscillator

Period

250

Conversion Rate

AD55

AD56

AD57

tCONV

FCNV

Conversion Time

Throughput Rate

Sample Time

—

14 TAD

ns

Ksps

—

500

—

TSAMP

3 TAD

Timing Parameters

AD60

tPCS

—

1.0 TAD

—

Auto convert trigger not

selected

Conversion Start from Sample

Trigger⁽²⁾

AD61

AD62

AD63

tPSS

tCSS

tDPU

Sample Start from Setting

Sample (SAMP) bit⁽²⁾

0.5 TAD

—

0.5 TAD

—

1.5 TAD

—

μs

—

Conversion Completion to

—

1

—

5

Sample Start (ASAM = 1)⁽²⁾

Time to Stabilize Analog Stage

from ADC Off to ADC On⁽²⁾

Note 1: Because the sample caps will eventually lose charge, clock rates below 10 kHz may affect linearity

performance, especially at elevated temperatures.

2: These parameters are characterized but not tested in manufacturing.

DS70283B-page 272

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

FIGURE 23-23:

ADC CONVERSION (10-BIT MODE) TIMING CHARACTERISTICS

(CHPS<1:0> = 01, SIMSAM = 0, ASAM = 0, SSRC<2:0> = 000)

AD50

Set SAMP

AD61

ADCLK

Instruction

Execution

Clear SAMP

AD60

SAMP

TSAMP

AD55

DONE

AD1IF

1

2

3

4

5

6

7

8

5

6

7

8

– Software sets AD1CON. SAMP to start sampling.

1

2

– Convert bit 9.

– Convert bit 8.

– Convert bit 0.

5

6

7

8

– Sampling starts after discharge period. TSAMP is described in

Section 28. “10/12-bit ADC without DMA” in the

“dsPIC33F Family Reference Manual”.

– Software clears AD1CON. SAMP to start conversion.

3

4

– One TAD for end of conversion.

– Sampling ends, conversion sequence starts.

FIGURE 23-24:

ADC CONVERSION (10-BIT MODE) TIMING CHARACTERISTICS (CHPS<1:0> = 01,

SIMSAM = 0, ASAM = 1, SSRC<2:0> = 111, SAMC<4:0> = 00001)

AD50

ADCLK

Instruction

Set ADON

Execution

SAMP

AD1IF

TSAMP

AD55

DONE

1

2

3

4

5

6

7

3

4

5

6

8

– Software sets AD1CON. ADON to start AD operation.

– Convert bit 0.

5

1

2

– Sampling starts after discharge period. TSAMP is described in

Section 28. “10/12-bit ADC without DMA” in the

“dsPIC33F Family Reference Manual”.

– One TAD for end of conversion.

– Begin conversion of next channel.

6

7

8

– Convert bit 9.

3

4

– Sample for time specified by SAMC<4:0>.

– Convert bit 8.

Preliminary

DS70283B-page 273

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

TABLE 23-42: ADC CONVERSION (10-BIT MODE) TIMING REQUIREMENTS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature -40°C ≤ TA ≤ +85°C for Industrial

AC CHARACTERISTICS

-40°C ≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min.

Typ⁽¹⁾

Max.

Units

Conditions

Clock Parameters

AD50 TAD

AD51 tRC

ADC Clock Period

ADC Internal RC Oscillator Period

76

—

ns

250

Conversion Rate

AD55 tCONV

AD56 FCNV

Conversion Time

Throughput Rate

—

12 TAD

—

1.1

—

Msps

—

AD57 TSAMP Sample Time

2 TAD

Timing Parameters

AD60 tPCS

AD61 tPSS

AD62 tCSS

AD63 tDPU

Conversion Start from Sample

—

0.5 TAD

—

1.0 TAD

—

1.5 TAD

—

μs

Auto-Convert Trigger

not selected

Trigger⁽¹⁾

Sample Start from Setting

Sample (SAMP) bit⁽¹⁾

—

0.5 TAD

—

Conversion Completion to

Sample Start (ASAM = 1)⁽¹⁾

Time to Stabilize Analog Stage

from ADC Off to ADC On⁽¹⁾

1

5

Note 1: These parameters are characterized but not tested in manufacturing.

2: Because the sample caps will eventually lose charge, clock rates below 10 kHz may affect linearity

performance, especially at elevated temperatures.

DS70283B-page 274

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

24.0 PACKAGING INFORMATION

24.1 Package Marking Information

28-Lead SPDIP

Example

dsPIC33FJ32MC

202-E/SP

XXXXXXXXXXXXXXXXX

e

3

YYWWNNN

0730235

28-Lead SOIC

Example

XXXXXXXXXXXXXXXXXXXX

dsPIC33FJ32MC

e

3

202-E/SO

0730235

YYWWNNN

28-Lead QFN

Example

XXXXXXXX

YYWWNNN

33FJ32MC

202EML

0730235

e

3

44-Lead QFN

Example

XXXXXXXXXX

YYWWNNN

dsPIC33FJ32

MC204-E/ML

e

3

0730235

44-Lead TQFP

Example

XXXXXXXXXX

YYWWNNN

dsPIC33FJ

32MC204

e

3

-E/PT

0730235

Legend: XX...X Customer-specific information

Y

YY

WW

NNN

Year code (last digit of calendar year)

Year code (last 2 digits of calendar year)

Week code (week of January 1 is week ‘01’)

Alphanumeric traceability code

Pb-free JEDEC designator for Matte Tin (Sn)

e

3

*

This package is Pb-free. The Pb-free JEDEC designator (

can be found on the outer packaging for this package.

)

e3

Note: If the full Microchip part number cannot be marked on one line, it is carried over to the next

line, thus limiting the number of available characters for customer-specific information.

Preliminary

DS70283B-page 275

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

24.2 Package Details

28-Lead Skinny Plastic Dual In-Line (SP) – 300 mil Body [SPDIP]

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

N

NOTE 1

E1

1

2 3

D

E

A2

A

L

c

b1

A1

b

e

eB

Units

INCHES

NOM

28

Dimension Limits

MIN

MAX

Number of Pins

Pitch

N

e

.100 BSC

–

Top to Seating Plane

A

–

.200

.150

–

Molded Package Thickness

Base to Seating Plane

Shoulder to Shoulder Width

Molded Package Width

Overall Length

A2

A1

E

.120

.015

.290

.240

1.345

.110

.008

.040

.014

–

.135

–

.310

.285

1.365

.130

.010

.050

.018

–

.335

.295

1.400

.150

.015

.070

.022

.430

E1

D

Tip to Seating Plane

Lead Thickness

L

c

Upper Lead Width

b1

b

Lower Lead Width

Overall Row Spacing §

eB

Notes:

1. Pin 1 visual index feature may vary, but must be located within the hatched area.

2. § Significant Characteristic.

3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side.

4. Dimensioning and tolerancing per ASME Y14.5M.

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

Microchip Technology Drawing C04-070B

DS70283B-page 276

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

28-Lead Plastic Small Outline (SO) – Wide, 7.50 mm Body [SOIC]

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

D

N

E

E1

NOTE 1

1

2

3

e

b

h

α

h

c

φ

A2

A

L

A1

L1

β

Units

MILLMETERS

Dimension Limits

MIN

NOM

MAX

Number of Pins

Pitch

N

e

28

1.27 BSC

Overall Height

A

–

2.65

–

Molded Package Thickness

Standoff §

A2

A1

E

2.05

0.10

–

0.30

Overall Width

10.30 BSC

Molded Package Width

Overall Length

Chamfer (optional)

Foot Length

E1

D

h

7.50 BSC

17.90 BSC

0.25

0.40

–

0.75

1.27

L

–

Footprint

L1

φ

1.40 REF

Foot Angle Top

Lead Thickness

Lead Width

0°

0.18

0.31

5°

–

8°

c

0.33

0.51

15°

b

Mold Draft Angle Top

Mold Draft Angle Bottom

α

β

5°

15°

Notes:

1. Pin 1 visual index feature may vary, but must be located within the hatched area.

2. § Significant Characteristic.

3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side.

4. Dimensioning and tolerancing per ASME Y14.5M.

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

REF: Reference Dimension, usually without tolerance, for information purposes only.

Microchip Technology Drawing C04-052B

Preliminary

DS70283B-page 277

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

28-Lead Plastic Quad Flat, No Lead Package (ML) – 6x6 mm Body [QFN]

with 0.55 mm Contact Length

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

D

D2

EXPOSED

PAD

e

E

b

E2

2

1

2

1

K

N

NOTE 1

L

BOTTOM VIEW

TOP VIEW

A

A3

A1

Units

MILLIMETERS

NOM

Dimension Limits

MIN

MAX

Number of Pins

N

e

28

Pitch

0.65 BSC

0.90

Overall Height

Standoff

A

0.80

0.00

1.00

0.05

A1

A3

E

0.02

Contact Thickness

Overall Width

0.20 REF

6.00 BSC

3.70

Exposed Pad Width

Overall Length

Exposed Pad Length

Contact Width

Contact Length

Contact-to-Exposed Pad

E2

D

3.65

4.20

6.00 BSC

3.70

D2

b

3.65

0.23

0.50

0.20

4.20

0.35

0.70

–

0.30

L

0.55

K

–

Notes:

1. Pin 1 visual index feature may vary, but must be located within the hatched area.

2. Package is saw singulated.

3. Dimensioning and tolerancing per ASME Y14.5M.

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

REF: Reference Dimension, usually without tolerance, for information purposes only.

Microchip Technology Drawing C04-105B

DS70283B-page 278

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

44-Lead Plastic Quad Flat, No Lead Package (ML) – 8x8 mm Body [QFN]

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

D2

D

EXPOSED

PAD

e

b

K

E

E2

2

1

2

1

N

NOTE 1

L

TOP VIEW

BOTTOM VIEW

A

A3

A1

Units

MILLIMETERS

Dimension Limits

MIN

NOM

44

MAX

Number of Pins

N

e

Pitch

0.65 BSC

0.90

Overall Height

Standoff

A

0.80

0.00

1.00

0.05

A1

A3

E

0.02

Contact Thickness

Overall Width

0.20 REF

8.00 BSC

6.45

Exposed Pad Width

Overall Length

Exposed Pad Length

Contact Width

Contact Length

Contact-to-Exposed Pad

E2

D

6.30

6.80

8.00 BSC

6.45

D2

b

6.30

0.25

0.30

0.20

6.80

0.38

0.50

–

0.30

L

0.40

K

–

Notes:

1. Pin 1 visual index feature may vary, but must be located within the hatched area.

2. Package is saw singulated.

3. Dimensioning and tolerancing per ASME Y14.5M.

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

REF: Reference Dimension, usually without tolerance, for information purposes only.

Microchip Technology Drawing C04-103B

Preliminary

DS70283B-page 279

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

44-Lead Plastic Thin Quad Flatpack (PT) – 10x10x1 mm Body, 2.00 mm Footprint [TQFP]

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

D

D1

E

e

E1

N

b

NOTE 1

1 2 3

NOTE 2

α

A

c

φ

A2

β

A1

L

L1

Units

MILLIMETERS

Dimension Limits

MIN

NOM

44

MAX

Number of Leads

Lead Pitch

N

e

0.80 BSC

–

Overall Height

A

–

1.20

1.05

0.15

0.75

Molded Package Thickness

Standoff

A2

A1

L

0.95

0.05

0.45

1.00

–

Foot Length

0.60

Footprint

L1

φ

1.00 REF

3.5°

Foot Angle

0°

7°

Overall Width

E

12.00 BSC

10.00 BSC

–

Overall Length

D

Molded Package Width

Molded Package Length

Lead Thickness

Lead Width

E1

D1

c

0.09

0.30

11°

0.20

0.45

13°

b

0.37

Mold Draft Angle Top

Mold Draft Angle Bottom

α

β

12°

11°

12°

13°

Notes:

1. Pin 1 visual index feature may vary, but must be located within the hatched area.

2. Chamfers at corners are optional; size may vary.

3. Dimensions D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.25 mm per side.

4. Dimensioning and tolerancing per ASME Y14.5M.

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

REF: Reference Dimension, usually without tolerance, for information purposes only.

Microchip Technology Drawing C04-076B

DS70283B-page 280

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

- Updated parameter TA15 (see Table 23-22)

APPENDIX A: REVISION HISTORY

- Updated parameter TB15 (see Table 23-23)

- Updated parameter TC15 (see Table 23-24)

- Updated parameter IC15 (see Table 23-26)

Revision A (February 2007)

Initial release of this document

Revision B (May 2007)

- Updated parameters AD05, AD06, AD07,

AD08, AD10 through AD13 and AD17; added

parameters AD05a and AD06a; added Note

2; modified ADC Accuracy headings to

include measurement information (see

Table 23-38)

This revision includes the following corrections and

updates:

• Minor typographical and formatting corrections

throughout the data sheet text.

• New content:

- Separated the ADC Module Specifications

table into three tables (see Table 23-38,

Table 23-39, and Table 23-40)

- Addition of bullet item (16-word conversion

result buffer) (see Section 19.1 “Key

Features”)

- Updated parameter AD50 (see Table 23-41)

• Updated register map information for RPINR14

and RPINR15 (see Table 3-16)

- Updated parameters AD50 and AD57 (see

Table 23-42)

• Figure updates:

- Updated Oscillator System Diagram (see

Figure 7-1)

- Updated WDT Block Diagram (see

Figure 20-2)

• Equation update:

- Serial Clock Rate (see Equation 17-1)

• Register updates:

- Peripheral Pin Select Input Registers (see

Register 9-1 through Register 9-13)

- Updated ADC1 Input Channel 0 Select

register (see Register 19-5)

• The following tables in Section 23.0 “Electrical

Characteristics” have been updated with

preliminary values:

- Updated Max MIPS for -40°C to +125°C

Temp Range (see Table 23-1)

- Updated parameter DC18 (see Table 23-4)

- Added new parameters for +125°C, and

updated Typical and Max values for most

parameters (see Table 23-5)

- Added new parameters for +125°C, and

updated Typical and Max values for most

parameters (see Table 23-6)

- Added new parameters for +125°C, and

updated Typical and Max values for most

parameters (see Table 23-7)

- Added new parameters for +125°C, and

updated Typical and Max values for most

parameters (see Table 23-8)

- Updated parameter DI51, added parameters

DI51a, DI51b, and DI51c (see Table 23-9)

- Added Note 1 (see Table 23-11)

- Updated parameters OS10 and OS30 (see

Table 23-16)

- Updated parameter OS52 (see Table 23-17)

- Updated parameter F20, added Note 2 (see

Table 23-18)

- Updated parameter F21 (see Table 23-19)

Preliminary

DS70283B-page 281

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

NOTES:

DS70283B-page 282

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

INDEX

Code Protection........................................................ 217, 224

Configuration Bits ............................................................. 217

Configuration Register Map.............................................. 217

Configuring Analog Port Pins............................................ 108

CPU

A

AC Characteristics ............................................................ 246

Internal RC Accuracy................................................ 248

Load Conditions........................................................ 246

ADC

Control Register.......................................................... 16

CPU Clocking System ........................................................ 96

PLL Configuration....................................................... 96

Selection..................................................................... 96

Sources ...................................................................... 96

Customer Change Notification Service............................. 287

Customer Notification Service .......................................... 287

Customer Support............................................................. 287

Initialization ............................................................... 203

Key Features............................................................. 203

ADC Module

ADC1 Register Map for dsPIC33FJ32MC202 ............ 36

ADC1 Register Map for dsPIC33FJ32MC204

and dsPIC33FJ16MC304 ................................... 37

Alternate Vector Table (AIVT)............................................. 63

Analog-to-Digital Converter (ADC).................................... 203

Arithmetic Logic Unit (ALU)................................................. 20

Assembler

D

Data Accumulators and Adder/Subtracter .......................... 22

Data Space Write Saturation...................................... 24

Overflow and Saturation............................................. 22

Round Logic ............................................................... 23

Write Back .................................................................. 23

Data Address Space........................................................... 27

Alignment.................................................................... 27

Memory Map for dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 Devices with 2 KBs RAM . 28

Near Data Space........................................................ 27

Software Stack ........................................................... 42

Width .......................................................................... 27

DC Characteristics............................................................ 238

I/O Pin Input Specifications ...................................... 243

I/O Pin Output Specifications.................................... 244

Idle Current (IDOZE) .................................................. 242

Idle Current (IIDLE).................................................... 241

Operating Current (IDD) ............................................ 240

Power-Down Current (IPD)........................................ 242

Program Memory...................................................... 245

Temperature and Voltage Specifications.................. 239

Development Support....................................................... 233

Doze Mode ....................................................................... 106

DSP Engine ........................................................................ 20

Multiplier ..................................................................... 22

MPASM Assembler................................................... 234

Automatic Clock Stretch.................................................... 187

Receive Mode........................................................... 187

Transmit Mode.......................................................... 187

B

Barrel Shifter ....................................................................... 24

Bit-Reversed Addressing .................................................... 45

Example...................................................................... 46

Implementation ........................................................... 45

Sequence Table (16-Entry)......................................... 46

Block Diagrams

16-bit Timer1 Module................................................ 133

A/D Module ....................................................... 204, 205

Connections for On-Chip Voltage Regulator............. 221

Device Clock............................................................... 95

DSP Engine ................................................................ 21

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 .. 10

dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 CPU Core ......................... 14

dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 PLL ................................... 97

Input Capture ............................................................ 141

Output Compare ....................................................... 145

PLL.............................................................................. 97

PWM Module .................................................... 148, 149

Quadrature Encoder Interface .................................. 169

Reset System.............................................................. 57

Shared Port Structure ............................................... 107

SPI ............................................................................ 178

Timer2 (16-bit) .......................................................... 137

Timer2/3 (32-bit) ....................................................... 136

UART ........................................................................ 195

Watchdog Timer (WDT)............................................ 222

E

Electrical Characteristics .................................................. 237

AC............................................................................. 246

Equations

ADC Conversion Clock Period ................................. 206

Calculating the PWM Period..................................... 144

Calculation for Maximum PWM Resolution .............. 144

Device Operating Frequency...................................... 96

PWM Period ............................................................. 151

PWM Resolution....................................................... 151

Relationship Between Device and SPI

C

C Compilers

Clock Speed ..................................................... 180

Serial Clock Rate...................................................... 185

UART Baud Rate with BRGH = 0............................. 196

UART Baud Rate with BRGH = 1............................. 196

Errata.................................................................................... 7

MPLAB C18 .............................................................. 234

MPLAB C30 .............................................................. 234

Clock Switching................................................................. 103

Enabling.................................................................... 103

Sequence.................................................................. 103

Code Examples

Erasing a Program Memory Page............................... 55

Initiating a Programming Sequence............................ 56

Loading Write Buffers ................................................. 56

Port Write/Read ........................................................ 108

PWRSAV Instruction Syntax..................................... 105

Preliminary

DS70283B-page 283

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

Interrupt Control and Status Registers ............................... 67

F

IECx............................................................................ 67

Fail-Safe Clock Monitor.....................................................103

IFSx ............................................................................ 67

Flash Program Memory.......................................................51

INTCON1.................................................................... 67

Control Registers ........................................................52

INTCON2.................................................................... 67

Operations ..................................................................52

IPCx............................................................................ 67

Programming Algorithm ..............................................55

Interrupt Setup Procedures................................................. 93

RTSP Operation..........................................................52

Initialization................................................................. 93

Table Instructions........................................................51

Interrupt Disable ......................................................... 93

Flexible Configuration .......................................................217

Interrupt Service Routine............................................ 93

FSCM

Trap Service Routine.................................................. 93

Delay for Crystal and PLL Clock Sources...................61

Interrupt Vector Table (IVT)................................................ 63

Device Resets.............................................................61

Interrupts Coincident with Power Save Instructions ......... 106

I

J

I/O Ports............................................................................107

JTAG Boundary Scan Interface........................................ 217

Parallel I/O (PIO).......................................................107

JTAG Interface.................................................................. 223

Write/Read Timing ....................................................108

2

I C

M

Addresses.................................................................187

Memory Organization ......................................................... 25

Baud Rate Generator................................................185

Microchip Internet Web Site.............................................. 287

General Call Address Support ..................................187

Modulo Addressing............................................................. 44

Interrupts...................................................................185

Applicability................................................................. 45

IPMI Support.............................................................187

Operation Example..................................................... 44

Master Mode Operation

Start and End Address ............................................... 44

Clock Arbitration................................................188

W Address Register Selection.................................... 44

Multi-Master Communication, Bus

Motor Control PWM .......................................................... 147

Collision and Bus Arbitration.....................188

Motor Control PWM Module

Operating Modes ......................................................185

2-Output Register Map ............................................... 34

Registers...................................................................185

6-Output Register Map for dsPIC33FJ12MC202........ 34

Slave Address Masking ............................................187

MPLAB ASM30 Assembler, Linker, Librarian................... 234

Slope Control ............................................................188

MPLAB ICD 2 In-Circuit Debugger ................................... 235

Software Controlled Clock Stretching

MPLAB ICE 2000 High-Performance Universal

In-Circuit Emulator.................................................... 235

MPLAB Integrated Development Environment

Software ................................................................... 233

MPLAB PM3 Device Programmer .................................... 235

MPLAB REAL ICE In-Circuit Emulator System ................ 235

MPLINK Object Linker/MPLIB Object Librarian................ 234

(STREN = 1) .....................................................187

2

I C Module

I2C1 Register Map ......................................................35

In-Circuit Debugger...........................................................223

In-Circuit Emulation...........................................................217

In-Circuit Serial Programming (ICSP) ....................... 217, 223

Infrared Support

Built-in IrDA Encoder and Decoder...........................197

External IrDA, IrDA Clock Output..............................197

Input Capture ....................................................................141

Registers...................................................................142

Input Change Notification..................................................108

Instruction Addressing Modes.............................................42

File Register Instructions ............................................42

Fundamental Modes Supported..................................43

MAC Instructions.........................................................43

MCU Instructions ........................................................42

Move and Accumulator Instructions............................43

Other Instructions........................................................43

Instruction Set

Overview ...................................................................228

Summary...................................................................225

Instruction-Based Power-Saving Modes...........................105

Idle ............................................................................106

Sleep.........................................................................105

Interfacing Program and Data Memory Spaces..................47

Internal RC Oscillator

N

NVM Module

Register Map .............................................................. 41

O

Open-Drain Configuration................................................. 108

Oscillator Configuration ...................................................... 95

Output Compare ............................................................... 143

P

Packaging......................................................................... 275

Details....................................................................... 276

Marking..................................................................... 275

Peripheral Module Disable (PMD) .................................... 106

PICSTART Plus Development Programmer..................... 236

Pinout I/O Descriptions (table)............................................ 11

PMD Module

Register Map .............................................................. 41

POR and Long Oscillator Start-up Times ........................... 61

PORTA

Use with WDT...........................................................222

Internet Address................................................................287

Register Map for dsPIC33FJ32MC202....................... 39

Register Map for dsPIC33FJ32MC204

and dsPIC33FJ16MC304 ................................... 39

PORTB

Register Map .............................................................. 40

DS70283B-page 284

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

PORTC

Register Map dsPIC33FJ32MC204

and dsPIC33FJ16MC304 ................................... 40

Power-Saving Features .................................................... 105

Clock Frequency and Switching................................ 105

Program Address Space..................................................... 25

Construction................................................................ 47

Data Access from Program Memory Using

Q

QEI

16-bit Up/Down Position Counter Mode ................... 170

Alternate 16-bit Timer/Counter ................................. 171

Count Direction Status.............................................. 170

Error Checking.......................................................... 170

Interrupts .................................................................. 172

Logic......................................................................... 170

Operation During CPU Idle Mode............................. 171

Operation During CPU Sleep Mode ......................... 171

Position Measurement Mode.................................... 170

Programmable Digital Noise Filters.......................... 171

Timer Operation During CPU Idle Mode................... 172

Timer Operation During CPU Sleep Mode ............... 171

Program Space Visibility..................................... 50

Data Access from Program Memory Using Table

Instructions ......................................................... 49

Data Access from, Address Generation...................... 48

Memory Map............................................................... 25

Table Read Instructions

TBLRDH ............................................................. 49

TBLRDL .............................................................. 49

Visibility Operation ...................................................... 50

Program Memory

Quadrature Encoder Interface (QEI)................................. 169

Quadrature Encoder Interface (QEI) Module

Register Map .............................................................. 35

Interrupt Vector ........................................................... 26

Organization................................................................ 26

Reset Vector ............................................................... 26

Pulse-Width Modulation Mode .......................................... 144

PWM

R

Reader Response............................................................. 288

Registers

AD1CHS0 (ADC1 Input Channel 0 Select................ 213

AD1CHS123 (ADC1 Input Channel 1, 2,

Center-Aligned.......................................................... 152

Complementary Mode............................................... 153

Complementary Output Mode................................... 154

Duty Cycle................................................................. 144

Edge-Aligned ............................................................ 151

Independent Output Mode ........................................ 154

Operation During CPU Idle Mode ............................. 156

Operation During CPU Sleep Mode.......................... 156

Output Override ........................................................ 154

Output Override Synchronization.............................. 155

Period................................................................ 144, 151

Single Pulse Mode.................................................... 154

PWM Dead-Time Generators ........................................... 153

Assignment ............................................................... 154

Ranges...................................................................... 154

Selection Bits (table)................................................. 154

PWM Duty Cycle

Comparison Units ..................................................... 152

Immediate Updates................................................... 153

Register Buffers ........................................................ 152

PWM Fault Pins ................................................................ 155

Enable Bits................................................................ 155

Fault States............................................................... 155

Input Modes .............................................................. 156

Cycle-by-Cycle.................................................. 156

Latched............................................................. 156

Priority....................................................................... 155

PWM Output and Polarity Control..................................... 155

Output Pin Control .................................................... 155

PWM Special Event Trigger.............................................. 156

Postscaler ................................................................. 156

PWM Time Base............................................................... 150

Continuous Up/Down Count Modes.......................... 150

Double Update Mode................................................ 151

Free-Running Mode.................................................. 150

Postscaler ................................................................. 151

Prescaler................................................................... 151

Single-Shot Mode ..................................................... 150

PWM Update Lockout ....................................................... 156

3 Select) ........................................................... 211

AD1CON1 (ADC1 Control 1).................................... 207

AD1CON2 (ADC1 Control 2).................................... 209

AD1CON3 (ADC1 Control 3).................................... 210

AD1CSSL (ADC1 Input Scan Select Low) ............... 215

AD1PCFGL (ADC1 Port Configuration Low)............ 215

CLKDIV (Clock Divisor) ............................................ 100

CORCON (Core Control)...................................... 18, 68

DFLTCON (QEI Control) .......................................... 175

I2CxCON (I2Cx Control)........................................... 189

I2CxMSK (I2Cx Slave Mode Address Mask)............ 193

I2CxSTAT (I2Cx Status)........................................... 191

ICxCON (Input Capture x Control)............................ 142

IEC0 (Interrupt Enable Control 0)............................... 77

IEC1 (Interrupt Enable Control 1)............................... 79

IEC3 (Interrupt Enable Control 3)............................... 80

IEC4 (Interrupt Enable Control 4)............................... 81

IFS0 (Interrupt Flag Status 0)..................................... 72

IFS1 (Interrupt Flag Status 1)..................................... 74

IFS3 (Interrupt Flag Status 3)..................................... 75

IFS4 (Interrupt Flag Status 4)..................................... 76

INTCON1 (Interrupt Control 1) ................................... 69

INTCON2 (Interrupt Control 2) ................................... 71

INTTREG Interrupt Control and Status Register ........ 92

IPC0 (Interrupt Priority Control 0)............................... 82

IPC1 (Interrupt Priority Control 1)............................... 83

IPC14 (Interrupt Priority Control 14)........................... 89

IPC15 (Interrupt Priority Control 15)........................... 90

IPC16 (Interrupt Priority Control 16)........................... 90

IPC18 (Interrupt Priority Control 18)........................... 91

IPC2 (Interrupt Priority Control 2)............................... 84

IPC3 (Interrupt Priority Control 3)............................... 85

IPC4 (Interrupt Priority Control 4)............................... 86

IPC5 (Interrupt Priority Control 5)............................... 87

IPC7 (Interrupt Priority Control 7)............................... 88

NVMCON (Flash Memory Control)............................. 53

NVMKEY (Nonvolatile Memory Key).......................... 54

OCxCON (Output Compare x Control)..................... 146

OSCCON (Oscillator Control)..................................... 98

OSCTUN (FRC Oscillator Tuning)............................ 102

P1DC2 (PWM Duty Cycle 2) .................................... 166

P1DC3 (PWM Duty Cycle 3) .................................... 167

PDC1 (PWM Duty Cycle 1) ...................................... 166

Preliminary

DS70283B-page 285

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

PLLFBD (PLL Feedback Divisor)..............................101

PTCON (PWM Time Base Control) ..........................157

PTMR (PWM Timer Count Value).............................158

PTPER (PWM Time Base Period) ............................158

PWMxCON1 (PWM Control 1)..................................160

PWMxCON2 (PWM Control 2)..................................161

PxDTCON1 (Dead-Time Control 1) ..........................162

PxDTCON2 (Dead-Time Control 2) ..........................163

PxFLTACON (Fault A Control)..................................164

PxOVDCON (Override Control) ................................165

PxSECMP (Special Event Compare)........................159

QEICON (QEI Control)..............................................173

RCON (Reset Control)................................................58

SPIxCON1 (SPIx Control 1)......................................182

SPIxCON2 (SPIx Control 2)......................................184

SPIxSTAT (SPIx Status and Control) .......................181

SR (CPU Status)................................................... 16, 68

T1CON (Timer1 Control)...........................................134

T2CON Control)........................................................138

T3CON Control .........................................................139

UxMODE (UARTx Mode)..........................................198

UxSTA (UARTx Status and Control).........................200

I2Cx Bus Data (Master Mode) .................................. 265

I2Cx Bus Data (Slave Mode) .................................... 267

I2Cx Bus Start/Stop Bits (Master Mode)................... 265

I2Cx Bus Start/Stop Bits (Slave Mode)..................... 267

Input Capture (CAPx) ............................................... 255

Motor Control PWM .................................................. 257

Motor Control PWM Fault ......................................... 257

OC/PWM................................................................... 256

Output Compare (OCx)............................................. 255

QEA/QEB Input ........................................................ 258

QEI Module Index Pulse........................................... 259

Reset, Watchdog Timer, Oscillator Start-up

Timer and Power-up Timer............................... 250

SPIx Master Mode (CKE = 0) ................................... 260

SPIx Master Mode (CKE = 1) ................................... 261

SPIx Slave Mode (CKE = 0) ..................................... 262

SPIx Slave Mode (CKE = 1) ..................................... 263

Timer1, 2, 3 External Clock ...................................... 252

TimerQ (QEI Module) External Clock ....................... 254

Timing Requirements

CLKO and I/O ........................................................... 249

External Clock........................................................... 247

Input Capture............................................................ 255

Timing Specifications

Reset

Clock Source Selection...............................................60

Special Function Register Reset States .....................61

Times ..........................................................................60

Reset Sequence..................................................................63

Resets.................................................................................57

10-bit ADC Conversion Requirements...................... 274

12-bit ADC Conversion Requirements...................... 272

I2Cx Bus Data Requirements (Master Mode)........... 266

I2Cx Bus Data Requirements (Slave Mode)............. 268

Motor Control PWM Requirements........................... 257

Output Compare Requirements................................ 255

PLL Clock ................................................................. 248

QEI External Clock Requirements............................ 254

QEI Index Pulse Requirements ................................ 259

Quadrature Decoder Requirements.......................... 258

Reset, Watchdog Timer, Oscillator Start-up Timer,

Power-up Timer and Brown-out Reset

Requirements ................................................... 251

Simple OC/PWM Mode Requirements ..................... 256

SPIx Master Mode (CKE = 0) Requirements............ 260

SPIx Master Mode (CKE = 1) Requirements............ 261

SPIx Slave Mode (CKE = 0) Requirements.............. 262

SPIx Slave Mode (CKE = 1) Requirements.............. 264

Timer1 External Clock Requirements....................... 252

Timer2 External Clock Requirements....................... 253

Timer3 External Clock Requirements....................... 253

S

Serial Peripheral Interface (SPI) .......................................177

Setup for Continuous Output Pulse Generation................143

Setup for Single Output Pulse Generation........................143

Software Simulator (MPLAB SIM).....................................234

Software Stack Pointer, Frame Pointer

CALLL Stack Frame....................................................42

Special Features of the CPU.............................................217

SPI

Master, Frame Master Connection ...........................179

Master/Slave Connection..........................................179

Slave, Frame Master Connection .............................180

Slave, Frame Slave Connection ...............................180

SPI Module

SPI1 Register Map......................................................35

Symbols Used in Opcode Descriptions.............................226

System Control

U

Register Map...............................................................40

UART

T

Baud Rate

Temperature and Voltage Specifications

Generator (BRG) .............................................. 196

Break and Sync Transmit Sequence ........................ 197

Flow Control Using UxCTS and UxRTS Pins ........... 197

Receiving in 8-bit or 9-bit Data Mode ....................... 197

Transmitting in 8-bit Data Mode................................ 197

Transmitting in 9-bit Data Mode................................ 197

UART Module

AC .............................................................................246

Timer1...............................................................................133

Timer2/3............................................................................135

Timing Characteristics

CLKO and I/O ...........................................................249

Timing Diagrams

10-bit ADC Conversion (CHPS = 01, SIMSAM = 0,

ASAM = 0, SSRC = 000) ..................................273

10-bit ADC Conversion (CHPS = 01,

UART1 Register Map.................................................. 35

Universal Asynchronous Receiver Transmitter (UART) ... 195

V

SIMSAM = 0, ASAM = 1, SSRC = 111,

SAMC = 00001) ................................................273

12-bit ADC Conversion (ASAM = 0, SSRC = 000) ...272

Center-Aligned PWM ................................................152

Dead-Time ................................................................153

Edge-Aligned PWM...................................................152

External Clock...........................................................247

Voltage Regulator (On-Chip) ............................................ 221

W

Watchdog Timer (WDT)............................................ 217, 222

Programming Considerations ................................... 222

WWW Address ................................................................. 287

WWW, On-Line Support ....................................................... 7

DS70283B-page 286

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

THE MICROCHIP WEB SITE

CUSTOMER SUPPORT

Microchip provides online support via our WWW site at

www.microchip.com. This web site is used as a means

to make files and information easily available to

customers. Accessible by using your favorite Internet

browser, the web site contains the following

information:

Users of Microchip products can receive assistance

through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

• Product Support – Data sheets and errata,

application notes and sample programs, design

resources, user’s guides and hardware support

documents, latest software releases and archived

software

Customers

should

contact

their

distributor,

representative or field application engineer (FAE) for

support. Local sales offices are also available to help

customers. A listing of sales offices and locations is

included in the back of this document.

• General Technical Support – Frequently Asked

Questions (FAQ), technical support requests,

online discussion groups, Microchip consultant

program member listing

Technical support is available through the web site

at: http://support.microchip.com

• Business of Microchip – Product selector and

ordering guides, latest Microchip press releases,

listing of seminars and events, listings of

Microchip sales offices, distributors and factory

representatives

CUSTOMER CHANGE NOTIFICATION

SERVICE

Microchip’s customer notification service helps keep

customers current on Microchip products. Subscribers

will receive e-mail notification whenever there are

changes, updates, revisions or errata related to a

specified product family or development tool of interest.

To register, access the Microchip web site at

www.microchip.com, click on Customer Change

Notification and follow the registration instructions.

Preliminary

DS70283B-page 287

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

READER RESPONSE

It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip prod-

uct. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation

can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150.

Please list the following information, and use this outline to provide us with your comments about this document.

To:

Technical Publications Manager

Reader Response

Total Pages Sent ________

RE:

From:

Name

Company

Address

City / State / ZIP / Country

Telephone: (_______) _________ - _________

FAX: (______) _________ - _________

Application (optional):

Would you like a reply?

Y

N

dsPIC33FJ32MC202/204

and dsPIC33FJ16MC304

DS70283B

Literature Number:

Device:

Questions:

1. What are the best features of this document?

2. How does this document meet your hardware and software development needs?

3. Do you find the organization of this document easy to follow? If not, why?

4. What additions to the document do you think would enhance the structure and subject?

5. What deletions from the document could be made without affecting the overall usefulness?

6. Is there any incorrect or misleading information (what and where)?

7. How would you improve this document?

DS70283B-page 288

Preliminary

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

PRODUCT IDENTIFICATION SYSTEM

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Examples:

a) dsPIC33FJ32MC202-E/SP:

dsPIC 33 FJ 32 MC2 02 T E / SP - XXX

Motor Control dsPIC33, 32 KB program

memory, 28-pin, Extended temp.,

SPDIP package.

Microchip Trademark

Architecture

Flash Memory Family

Program Memory Size (KB)

Product Group

Pin Count

Tape and Reel Flag (if applicable)

Temperature Range

Package

Pattern

Architecture:

33

=

16-bit Digital Signal Controller

Flash program memory, 3.3V

Flash Memory Family: FJ

Product Group:

Pin Count:

MC2

=

Motor Control family

MC3

02

04

=

28-pin

44-pin

Temperature Range:

I

E

=

-40°C to+85°C (Industrial)

-40°C to+125°C (Extended)

Package:

SP

SO

ML

PT

=

Skinny Plastic Dual In-Line - 300 mil body (SPDIP)

Plastic Small Outline - Wide - 300 mil body (SOIC)

Plastic Quad, No Lead Package - 6x6 mm body (QFN)

Plastic Thing Quad Flatpack - 10x10x1 mm body (TQFP)

Preliminary

DS70283B-page 289

WORLDWIDE SALES AND SERVICE

AMERICAS

ASIA/PACIFIC

EUROPE

Corporate Office

Asia Pacific Office

Suites 3707-14, 37th Floor

Tower 6, The Gateway

Habour City, Kowloon

Hong Kong

Tel: 852-2401-1200

Fax: 852-2401-3431

India - Bangalore

Tel: 91-80-4182-8400

Fax: 91-80-4182-8422

Austria - Wels

Tel: 43-7242-2244-39

Fax: 43-7242-2244-393

2355 West Chandler Blvd.

Chandler, AZ 85224-6199

Tel: 480-792-7200

Fax: 480-792-7277

Technical Support:

http://support.microchip.com

Web Address:

www.microchip.com

Denmark - Copenhagen

Tel: 45-4450-2828

Fax: 45-4485-2829

India - New Delhi

Tel: 91-11-4160-8631

Fax: 91-11-4160-8632

France - Paris

Tel: 33-1-69-53-63-20

Fax: 33-1-69-30-90-79

India - Pune

Tel: 91-20-2566-1512

Fax: 91-20-2566-1513

Australia - Sydney

Tel: 61-2-9868-6733

Fax: 61-2-9868-6755

Atlanta

Duluth, GA

Tel: 678-957-9614

Fax: 678-957-1455

Germany - Munich

Tel: 49-89-627-144-0

Fax: 49-89-627-144-44

Japan - Yokohama

Tel: 81-45-471- 6166

Fax: 81-45-471-6122

China - Beijing

Tel: 86-10-8528-2100

Fax: 86-10-8528-2104

Italy - Milan

Tel: 39-0331-742611

Fax: 39-0331-466781

Korea - Gumi

Tel: 82-54-473-4301

Fax: 82-54-473-4302

Boston

China - Chengdu

Tel: 86-28-8665-5511

Fax: 86-28-8665-7889

Westborough, MA

Tel: 774-760-0087

Fax: 774-760-0088

Netherlands - Drunen

Tel: 31-416-690399

Fax: 31-416-690340

Korea - Seoul

China - Fuzhou

Tel: 86-591-8750-3506

Fax: 86-591-8750-3521

Tel: 82-2-554-7200

Fax: 82-2-558-5932 or

82-2-558-5934

Chicago

Itasca, IL

Tel: 630-285-0071

Fax: 630-285-0075

Spain - Madrid

Tel: 34-91-708-08-90

Fax: 34-91-708-08-91

China - Hong Kong SAR

Tel: 852-2401-1200

Fax: 852-2401-3431

Malaysia - Penang

Tel: 60-4-646-8870

Fax: 60-4-646-5086

Dallas

Addison, TX

Tel: 972-818-7423

Fax: 972-818-2924

UK - Wokingham

Tel: 44-118-921-5869

Fax: 44-118-921-5820

China - Qingdao

Tel: 86-532-8502-7355

Fax: 86-532-8502-7205

Philippines - Manila

Tel: 63-2-634-9065

Fax: 63-2-634-9069

Detroit

Farmington Hills, MI

Tel: 248-538-2250

Fax: 248-538-2260

China - Shanghai

Tel: 86-21-5407-5533

Fax: 86-21-5407-5066

Singapore

Tel: 65-6334-8870

Fax: 65-6334-8850

Kokomo

Kokomo, IN

Tel: 765-864-8360

Fax: 765-864-8387

China - Shenyang

Tel: 86-24-2334-2829

Fax: 86-24-2334-2393

Taiwan - Hsin Chu

Tel: 886-3-572-9526

Fax: 886-3-572-6459

China - Shenzhen

Tel: 86-755-8203-2660

Fax: 86-755-8203-1760

Taiwan - Kaohsiung

Tel: 886-7-536-4818

Fax: 886-7-536-4803

Los Angeles

Mission Viejo, CA

Tel: 949-462-9523

Fax: 949-462-9608

China - Shunde

Tel: 86-757-2839-5507

Fax: 86-757-2839-5571

Taiwan - Taipei

Tel: 886-2-2500-6610

Fax: 886-2-2508-0102

Santa Clara

Santa Clara, CA

Tel: 408-961-6444

Fax: 408-961-6445

China - Wuhan

Tel: 86-27-5980-5300

Fax: 86-27-5980-5118

Thailand - Bangkok

Tel: 66-2-694-1351

Fax: 66-2-694-1350

Toronto

Mississauga, Ontario,

Canada

Tel: 905-673-0699

Fax: 905-673-6509

China - Xian

Tel: 86-29-8833-7250

Fax: 86-29-8833-7256

12/08/06

DS70283B-page 290

Preliminary


型号：	DSPIC33FJ32MC204T-I/PT
厂家：	MICROCHIP
描述：	16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44, 10 X 10 MM, 1 MM HEIGHT, LEAD FREE, PLASTIC, TQFP-44 微控制器
文件：	总292页 (文件大小：4354K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DSPIC33FJ32MC204T-I/PT [MICROCHIP]

相关型号：

DSPIC33FJ32MC204T-IPT

DSPIC33FJ32MC204TI/PT-XXX

dsPIC33FJ32MC302

DSPIC33FJ32MC302EML

DSPIC33FJ32MC302EMM

DSPIC33FJ32MC302EPT

DSPIC33FJ32MC302ESO

DSPIC33FJ32MC302ESP

DSPIC33FJ32MC302HML

DSPIC33FJ32MC302HMM

DSPIC33FJ32MC302HPT

DSPIC33FJ32MC302HSO