UPSD3233A-24T6T_技术文档

uPSD3234A, uPSD3234BV

uPSD3233B, uPSD3233BV

Flash Programmable System Devices

with 8032 Microcontroller Core and 64 Kbit SRAM

FEATURES SUMMARY

■

FAST 8-BIT 8032 MCU

Figure 1. Packages

–

40MHz at 5.0V, 24MHz at 3.3V

Core, 12-clocks per instruction

■

DUAL FLASH MEMORIES WITH MEMORY

MANAGEMENT

–

Place either memory into 8032 program

address space or data address space

–

READ-while-WRITE operation for In-

Application Programming and EEPROM

emulation

TQFP52 (T)

52-lead, Thin,

Quad Flat

–

Single voltage program and erase

100K minimum erase cycles, 15-year

retention

■

CLOCK, RESET, AND SUPPLY

MANAGEMENT

–

SRAM is Battery Backup capable

Normal, Idle, and Power Down Modes

Power-on and Low Voltage reset

supervisor

–

Programmable Watchdog Timer

■

PROGRAMMABLE LOGIC, GENERAL

PURPOSE

TQFP80 (U)

80-lead, Thin,

Qual Flat

–

16 macrocells

Implements state machines, glue-logic,

and so forth

COMMUNICATION INTERFACES

–

USB v1.1, low-speed 1.5Mbps, 3

endpoints

■

A/D CONVERTER

Four channels, 8-bit resolution, 10µs

TIMERS AND INTERRUPTS

–

2

–

I C Master/Slave bus controller

Two UARTs with independent baud rate

Six I/O ports with up to 46 I/O pins

8032 Address/Data bus available on

TQFP80 package

5 PWM outputs, 8-bit resolution

–

Three 8032 standard 16-bit timers

10 Interrupt sources with two external

interrupt pins

■

Single Supply Voltage

–

4.5 to 5.5V

3.0 to 3.6V

■

JTAG IN-SYSTEM PROGRAMMING

–

Program the entire device in as little as

10 seconds

November 2004

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Table 1. Device Summary

Max

Clock Flash

(MHz) (bytes) (bytes)

1st

2nd

Flash

V

(V)

SRAM

(bytes)

8032

Bus

CC

Part Number

GPIO USB

Pkg.

Temp.

uPSD3233B-40T6

uPSD3233BV-24T6

uPSD3233B-40U6

uPSD3233BV-24U6

uPSD3234A-40T6

uPSD3234A-40U6

uPSD3234BV-24U6

40

24

40

24

40

24

128K

256K

32K

8K

37

46

37

46

No

Yes

No

4.5-5.5 TQFP52 –40°C to 85°C

3.0-3.6 TQFP52 –40°C to 85°C

Yes 4.5-5.5 TQFP80 –40°C to 85°C

Yes 3.0-3.6 TQFP80 –40°C to 85°C

No

4.5-5.5 TQFP52 –40°C to 85°C

Yes 4.5-5.5 TQFP80 –40°C to 85°C

Yes 3.0-3.6 TQFP80 –40°C to 85°C

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TABLE OF CONTENTS

FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SUMMARY DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

52-PIN PACKAGE I/O PORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ARCHITECTURE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Memory Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Program Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Data memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

XRAM-DDC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

XRAM-PSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Addressing Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Arithmetic Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Logical Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Data Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Boolean Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Relative Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Jump Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Machine Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

uPSD3200 HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

MCU MODULE DISCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Special Function Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

INTERRUPT SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

External Int0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Timer 0 and 1 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Timer 2 Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2

I C Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

External Int1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

DDC Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

USB Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

USART Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Interrupt Priority Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Interrupts Enable Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

How Interrupts are Handled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

POWER-SAVING MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Idle Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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Power-Down Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Power Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Idle Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Power-Down Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

I/O PORTS (MCU MODULE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

PORT Type and Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

SUPERVISORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

External Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Low VDD Voltage Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Watchdog Timer Overflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

USB Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

WATCHDOG TIMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

TIMER/COUNTERS (TIMER 0, TIMER 1 AND TIMER 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Timer 0 and Timer 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Timer 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

STANDARD SERIAL INTERFACE (UART) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Multiprocessor Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Serial Port Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

ANALOG-TO-DIGITAL CONVERTOR (ADC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

ADC Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

PULSE WIDTH MODULATION (PWM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

4-channel PWM Unit (PWM 0-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Programmable Period 8-bit PWM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

PWM 4 Channel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

2

I C INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Serial Status Register (SxSTA: S1STA, S2STA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Data Shift Register (SxDAT: S1DAT, S2DAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Address Register (SxADR: S1ADR, S2ADR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

DDC INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Special Function Register for the DDC Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Host Type Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

DDC1 Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

DDC2B Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

USB HARDWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

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USB related registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Receiver Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

External USB Pull-Up Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

PSD MODULE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

In-System Programming (ISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

DEVELOPMENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

PSD MODULE REGISTER DESCRIPTION AND ADDRESS OFFSET . . . . . . . . . . . . . . . . . . . . . . . . 98

PSD MODULE DETAILED OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

MEMORY BLOCKS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Primary Flash Memory and Secondary Flash memory Description . . . . . . . . . . . . . . . . . . . . . 99

Memory Block Select Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Power-down Instruction and Power-up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

READ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Programming Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Erasing Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Specific Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Sector Select and SRAM Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Page Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

PLDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

The Turbo Bit in PSD Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Decode PLD (DPLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Complex PLD (CPLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Output Macrocell (OMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Product Term Allocator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Input Macrocells (IMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

I/O PORTS (PSD MODULE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

General Port Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Port Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

MCU I/O Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

PLD I/O Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Address Out Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Peripheral I/O Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

JTAG In-System Programming (ISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Port Configuration Registers (PCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Port Data Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

5/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Ports A and B – Functionality and Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Port C – Functionality and Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Port D – Functionality and Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

External Chip Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

POWER MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

PLD Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

PSD Chip Select Input (CSI, PD2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Input Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Input Control Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

RESET TIMING AND DEVICE STATUS AT RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Warm RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

I/O Pin, Register and PLD Status at RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Reset of Flash Memory Erase and Program Cycles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

PROGRAMMING IN-CIRCUIT USING THE JTAG SERIAL INTERFACE . . . . . . . . . . . . . . . . . . . . . 134

Standard JTAG Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

JTAG Extensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Security and Flash memory Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

INITIAL DELIVERY STATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

AC/DC PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

EMC CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Functional EMS (Electromagnetic Susceptibility) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Designing Hardened Software To Avoid Noise Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Absolute Maximum Ratings (Electrical Sensitivity). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

PACKAGE MECHANICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

6/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

SUMMARY DESCRIPTION

The uPSD323x Series combines a fast 8051-

based microcontroller with a flexible memory

structure, programmable logic, and a rich periph-

eral mix including USB, to form an ideal embedded

controller. At its core is an industry-standard 8032

MCU operating up to 40MHz.

Dual Flash memory banks provide a robust solu-

tion for remote product updates in the field through

In-Application Programming (IAP). Dual Flash

banks also support EEPROM emulation, eliminat-

ing the need for external EEPROM chips.

General purpose programmable logic (PLD) is in-

cluded to build an endless variety of glue-logic,

saving external logic devices. The PLD is config-

ured using the software development tool, PSD-

soft Express, available from the web at

www.st.com/psm, at no charge.

A JTAG serial interface is used for In-System Pro-

gramming (ISP) in as little as 10 seconds, perfect

for manufacturing and lab development.

The USB 1.1 low-speed interface has one Control

endpoint and two Interrupt endpoints suitable for

HID class drivers.

The 8032 core is coupled to Programmable Sys-

tem Device (PSD) architecture to optimize the

8032 memory structure, offering two independent

banks of Flash memory that can be placed at vir-

tually any address within 8032 program or data ad-

dress space, and easily paged beyond 64K bytes

using on-chip programmable decode logic.

The uPSD323x also includes supervisor functions

such as a programmable watchdog timer and low-

voltage reset.

Figure 2. Block Diagram

uPSD323x

(3) 16-bit

Timer/

Counters

8032

MCU

Core

1st Flash Memory:

128K or 256K Bytes

Programmable

(2)

External

Interrupts

Decode and

Page Logic

2nd Flash Memory:

I²C

32K Bytes

P3.0:7

SRAM:

8K Bytes

UART0

(8) GPIO, Port A

PA0:7

(80-pin only)

(8) GPIO, Port 3

(8) GPIO, Port 1

(4) 8-bit ADC

General

PB0:7

PD1:2

(8) GPIO, Port B

(2) GPIO, Port D

(4) GPIO, Port C

Purpose

Programmable

Logic,

P1.0:7

16 Macrocells

PC0:7

JTAG ISP

UART1

MCU

Bus

8032 Address/Data/Control Bus

(80-pin device only)

(5) 8-bit PWM

(8) GPIO, Port 4

USB v1.1

Supervisor:

Watchdog and Low-Voltage Reset

P4.0:7

USB+,

USB–

Dedicated

Pins

V_CC, V_DD, GND, Reset, Crystal In

AI10429

7/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 3. TQFP52 Connections

PD1/CLKIN 1

PC7 2

39 P1.5/ADC1

38 P1.4/ADC0

37 P1.3/TXD1

36 P1.2/RXD1

35 P1.1/T2X

34 P1.0/T2

JTAG TDO 3

JTAG TDI 4

(1)

USB–

5

PC4/TERR_ 6

USB+ 7

33 V

CC

V

8

32 XTAL2

CC

GND 9

31 XTAL1

PC3/TSTAT 10

30 P3.7/SCL1

29 P3.6/SDA1

28 P3.5/T1

27 P3.4/T0

PC2/V

STBY

11

JTAG TCK 12

JTAG TMS 13

AI07423b

Note: 1. Pull-up resistor required on pin 5 (2kΩ for 3V devices, 7.5kΩ for 5V devices) for all 52-pin devices, with or without USB function.

8/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 4. TQFP80 Connections

PD2 1

P3.3 /EXINT1 2

PD1/CLKIN 3

ALE 4

60 P1.5/ADC1

59 P1.4/ADC0

58 P1.3/TXD1

57 A11

PC7 5

56 P1.2/RXD1

55 A10

JTAG/TDO 6

JTAG/TDI 7

(1)

54 P1.1/TX2

53 A9

USB–

8

PC4/TERR_ 9

52 P1.0/T2

51 A8

USB+ 10

(2)

NC

V

11

12

50 V

CC

49 XTAL2

48 XTAL1

47 AD7

CC

GND 13

PC3/TSTAT 14

PC2/V

STBY

15

46 P3.7/SCL1

45 AD6

JTAG TCK 16

(2)

NC

17

44 P3.6/SDA1

43 AD5

P4.7/PWM4 18

P4.6/PWM3 19

JTAG TMS 20

42 P3.5/T1

41 AD4

AI07424b

Note: 1. Pull-up resistor required on pin 8 (2kΩ for 3V devices, 7.5kΩ for 5V devices) for all 82-pin devices, with or without USB function.

2. NC = Not Connected

9/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 2. 80-Pin Package Pin Description

Signal

Function

Port Pin

Pin No. In/Out

Name

Basic

Alternate

External Bus

AD0

36

I/O

Multiplexed Address/Data bus A1/D1

Multiplexed Address/Data bus A0/D0

Multiplexed Address/Data bus A2/D2

Multiplexed Address/Data bus A3/D3

Multiplexed Address/Data bus A4/D4

Multiplexed Address/Data bus A5/D5

Multiplexed Address/Data bus A6/D6

Multiplexed Address/Data bus A7/D7

General I/O port pin

AD1

AD2

AD3

AD4

AD5

AD6

AD7

T2

37

38

39

41

43

45

47

52

54

56

58

59

60

61

64

51

53

55

57

75

77

I/O

O

P1.0

P1.1

P1.2

P1.3

P1.4

P1.5

P1.6

P1.7

Timer 2 Count input

Timer 2 Trigger input

2nd UART Receive

2nd UART Transmit

ADC Channel 0 input

ADC Channel 1 input

ADC Channel 2 input

ADC Channel 3 input

TX2

General I/O port pin

RxD1

TxD1

ADC0

ADC1

ADC2

ADC3

A8

General I/O port pin

External Bus, Address A8

External Bus, Address A9

External Bus, Address A10

External Bus, Address A11

General I/O port pin

A9

O

A10

O

A11

O

P3.0

P3.1

RxD0

TxD0

I/O

UART Receive

UART Transmit

General I/O port pin

Interrupt 0 input / Timer 0 gate

control

P3.2

P3.3

EXINT0

EXINT1

79

2

I/O

General I/O port pin

Interrupt 1 input / Timer 1 gate

control

P3.4

P3.5

P3.6

T0

T1

40

42

44

I/O

General I/O port pin

Counter 0 input

Counter 1 input

2

SDA1

I C Bus serial data I/O

2

P3.7

P4.0

P4.1

P4.2

SCL1

46

33

31

30

I/O

General I/O port pin

I C Bus clock I/O

DDC SDA

DDC SCL

DDC V

SYNC

8-bit Pulse Width Modulation

output 0

P4.3

PWM0

27

I/O

General I/O port pin

10/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Function

Signal

Name

Port Pin

Pin No. In/Out

Basic

General I/O port pin

Alternate

8-bit Pulse Width Modulation

output 1

P4.4

P4.5

P4.6

P4.7

PWM1

PWM2

PWM3

PWM4

USB–

25

23

19

18

8

I/O

8-bit Pulse Width Modulation

output 2

General I/O port pin

8-bit Pulse Width Modulation

output 3

Programmable 8-bit Pulse Width

modulation output 4

Pull-up resistor required (2kΩ for 3V

devices, 7.5kΩ for 5V devices)

V

70

65

62

63

4

O

Reference Voltage input for ADC

READ signal, external bus

WRITE signal, external bus

PSEN signal, external bus

Address Latch signal, external bus

Active low RESET input

Oscillator input pin for system clock

Oscillator output pin for system clock

General I/O port pin

REF

RD_

WR_

O

PSEN_

ALE

O

RESET_

XTAL1

XTAL2

68

48

49

35

34

32

28

26

24

22

21

80

78

76

74

73

72

67

66

I

O

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

I/O

General I/O port pin

1. PLD Macro-cell outputs

2. PLD inputs

General I/O port pin

3. Latched Address Out (A0-

General I/O port pin

A7)

4. Peripheral I/O Mode

General I/O port pin

1. PLD Macro-cell outputs

2. PLD inputs

General I/O port pin

3. Latched Address Out (A0-

General I/O port pin

A7)

General I/O port pin

11/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Function

Signal

Name

Port Pin

Pin No. In/Out

Basic

Alternate

JTAG TMS

JTAG TCK

20

16

15

14

9

I

JTAG pin

I

1. PLD Macro-cell outputs

2. PLD inputs

V

PC2

PC3

PC4

I/O

I

General I/O port pin

JTAG pin

STBY

3. SRAM stand by voltage in-

TSTAT

TERR_

put (V

)

STBY

4. SRAM battery-on indicator

(PC4)

5. JTAG pins are dedicated

JTAG TDI

JTAG TDO

7

pins

6

O

JTAG pin

PC7

PD1

5

I/O

General I/O port pin

1. PLD I/O

2. Clock input to PLD and APD

CLKIN

3

1

I/O

General I/O port pin

1. PLD I/O

2. Chip select to PSD Module

PD2

Vcc

12

50

13

29

69

10

11

17

71

GND

USB+

NC

52-PIN PACKAGE I/O PORT

The 52-pin package members of the uPSD323X

Devices have the same port pins as those of the

80-pin package except:

■

Port A (PA0-PA7)

Port D (PD2)

Bus control signal (RD,WR,PSEN,ALE)

■

Port 0 (P0.0-P0.7, external address/data bus

AD0-AD7)

Pin 5 requires a pull-up resistor (2kΩ for 3V

devices, 7.5kΩ for 5V devices) for all devices,

with or without USB function.

■

Port 2 (P2.0-P2.3, external address bus A8-

A11)

12/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

ARCHITECTURE OVERVIEW

Memory Organization

The uPSD323X Devices’s standard 8032 Core

has separate 64KB address spaces for Program

memory and Data Memory. Program memory is

where the 8032 executes instructions from. Data

memory is used to hold data variables. Flash

memory can be mapped in either program or data

space. The Flash memory consists of two flash

memory blocks: the main Flash (1 or 2Mbit) and

the Secondary Flash (256Kbit). Except during

flash memory programming or update, Flash

memory can only be read, not written to. A Page

Register is used to access memory beyond the

64K bytes address space. Refer to the PSD Mod-

ule for details on mapping of the Flash memory.

The 8032 core has two types of data memory (in-

ternal and external) that can be read and written.

The internal SRAM consists of 256 bytes, and in-

cludes the stack area.

The SFR (Special Function Registers) occupies

the upper 128 bytes of the internal SRAM, the reg-

isters can be accessed by Direct addressing only.

There are two separate blocks of external SRAM

inside the uPSD323X Devices: one 256 bytes

block is assigned for DDC data storage. Another

8K bytes resides in the PSD Module that can be

mapped to any address space defined by the user.

Figure 5. Memory Map and Address Space

MAIN

FLASH

EXT. RAM

(DDC)

INT. RAM

SFR

FF

FFFF

SECONDARY

Indirect

Direct

Addressing

FLASH

Addressing

128KB

OR

256B

8KB

7F

Indirect

or

32KB

256KB

Direct

Addressing

0

FF00

Internal RAM Space

(256 Bytes)

Flash Memory Space

External RAM Space

(MOVX)

AI06635

Registers

Figure 6. 8032 MCU Registers

The 8032 has several registers; these are the Pro-

gram Counter (PC), Accumulator (A), B Register

(B), the Stack Pointer (SP), the Program Status

Word (PSW), General purpose registers (R0 to

R7), and DPTR (Data Pointer register).

Accumulator

B Register

A

B

Stack Pointer

SP

PCL

Program Counter

PCH

Program Status Word

General Purpose

Register (Bank0-3)

PSW

R0-R7

DPTR(DPH) DPTR(DPL) Data Pointer Register

AI06636

13/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Accumulator. The Accumulator is the 8-bit gen-

eral purpose register, used for data operation such

as transfer, temporary saving, and conditional

tests. The Accumulator can be used as a 16-bit

register with B Register as shown below.

Program Counter. The Program Counter is a 16-

bit wide which consists of two 8-bit registers, PCH

and PCL. This counter indicates the address of the

next instruction to be executed. In RESET state,

the program counter has reset routine address

(PCH:00h, PCL:00h).

Program Status Word. The Program Status

Word (PSW) contains several bits that reflect the

current state of the CPU and select Internal RAM

(00h to 1Fh: Bank0 to Bank3). The PSW is de-

scribed in Figure 9., page 15. It contains the Carry

flag, the Auxiliary carry flag, the Half Carry (for

BCD operation), the general purpose flag, the

Register bank select flags, the Overflow flag, and

Parity flag.

Figure 7. Configuration of BA 16-bit Registers

B

A

Two 8-bit Registers can be used as a "BA" 16-bit Registers

[Carry Flag, CY]. This flag stores any carry or not

borrow from the ALU of CPU after an arithmetic

operation and is also changed by the Shift Instruc-

tion or Rotate Instruction.

[Auxiliary Carry Flag, AC]. After operation, this is

set when there is a carry from Bit 3 of ALU or there

is no borrow from Bit 4 of ALU.

AI06637

B Register. The B Register is the 8-bit general

purpose register, used for an arithmetic operation

such as multiply, division with Accumulator

Stack Pointer. The Stack Pointer Register is 8

bits wide. It is incremented before data is stored

during PUSH and CALL executions. While the

stack may reside anywhere in on-chip RAM, the

Stack Pointer is initialized to 07h after reset. This

causes the stack to begin at location 08h.

[Register Bank Select Flags, RS0, RS1]. This flags

select one of

four bank(00~07H:bank0,

08~0Fh:bank1, 10~17h:bank2, 17~1Fh:bank3) in

Internal RAM.

[Overflow Flag, OV]. This flag is set to '1' when an

overflow occurs as the result of an arithmetic oper-

ation involving signs. An overflow occurs when the

result of an addition or subtraction exceeds +127

(7Fh) or -128 (80h). The CLRV instruction clears

the overflow flag. There is no set instruction. When

the BIT instruction is executed, Bit 6 of memory is

copied to this flag.

Figure 8. Stack Pointer

Stack Area (30h-FFh)

Bit 15

Bit 8 Bit 7

Bit 0

00h

SP

[Parity Flag, P]. This flag reflect on number of Ac-

cumulator’s 1. If number of Accumulator’s 1 is odd,

P=0. otherwise P=1. Sum of adding Accumulator’s

1 to P is always even.

00h-FFh

Hardware Fixed

SP (Stack Pointer) could be in 00h-FFh

AI06638

R0~R7. General purpose 8-bit registers that are

locked in the lower portion of internal data area.

Data Pointer Register. Data Pointer Register is

16-bit wide which consists of two-8bit registers,

DPH and DPL. This register is used as a data

pointer for the data transmission with external data

memory in the PSD Module.

14/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 9. PSW (Program Status Word) Register

MSB

CY AC FO RS1 RS0 OV

LSB

P

Reset Value 00h

Parity Flag

PSW

Carry Flag

Auxillary Carry Flag

Bit not assigned

Overflow Flag

General Purpose Flag

Register Bank Select Flags

(to select Bank0-3)

AI06639

Program Memory

Figure 10. Interrupt Location of Program

Memory

The program memory consists of two Flash mem-

ory: 128 KByte (or 256 KByte) Main Flash and 32

KByte of Secondary Flash. The Flash memory can

be mapped to any address space as defined by

the user in the PSDsoft Tool. It can also be

mapped to Data memory space during Flash

memory update or programming.

After reset, the CPU begins execution from loca-

tion 0000h. As shown in Figure 10, each interrupt

is assigned a fixed location in Program Memory.

The interrupt causes the CPU to jump to that loca-

tion, where it commences execution of the service

routine. External Interrupt 0, for example, is as-

signed to location 0003h. If External Interrupt 0 is

going to be used, its service routine must begin at

location 0003h. If the interrupt is not going to be

used, its service location is available as general

purpose Pro-gram Memory.

The interrupt service locations are spaced at 8-

byte intervals: 0003h for External Interrupt 0,

000Bh for Timer 0, 0013h for External Interrupt 1,

001Bh for Timer 1 and so forth. If an interrupt ser-

vice routine is short enough (as is often the case

in control applications), it can reside entirely within

that 8-byte interval. Longer service routines can

use a jump instruction to skip over subsequent in-

terrupt locations, if other interrupts are in use.

008Bh

•

Interrupt

Location

0013h

8 Bytes

000Bh

0003h

Reset

0000h

AI06640

XRAM-DDC

The 256 bytes of XRAM-DDC used to support

DDC interface is also available for system usage

by indirect addressing through the address pointer

DDCADR and data I/O buffer RAMBUF. The ad-

dress pointer (DDCADR) is equipped with the post

increment capability to facilitate the transfer of

data in bulk (for details refer to DDC Interface

part). However, it is also possible to address the

RAM through MOVX command as normally used

in the internal RAM extension of 80C51 deriva-

tives. XRAM-DDC FF00 to FFFF is directly ad-

dressable as external data memory locations

FF00 to FFFF via MOVX-DPTR instruction or via

MOVX-Ri instruction. When XRAM-DDC is dis-

abled, the address space FF00 to FFFF can be as-

signed to other resources.

Data memory

The internal data memory is divided into four phys-

ically separated blocks: 256 bytes of internal RAM,

128 bytes of Special Function Registers (SFRs)

areas, 256 bytes of external RAM (XRAM-DDC)

and 8K bytes (XRAM-PSD) in the PSD Module.

XRAM-PSD

The 8K bytes of XRAM-PSD resides in the PSD

Module and can be mapped to any address space

through the DPLD (Decoding PLD) as defined by

the user in PSDsoft Development tool. The XRAM-

PSD has a battery backup feature that allow the

data to be retained in the event of a power lost.

The battery is connected to the Port C PC2 pin.

This pin must be configured in PSDSoft to be bat-

tery back-up.

RAM

Four register banks, each 8 registers wide, occupy

locations 0 through 31 in the lower RAM area.

Only one of these banks may be enabled at a time.

The next 16 bytes, locations 32 through 47, con-

tain 128 directly addressable bit locations. The

stack depth is only limited by the available internal

RAM space of 256 bytes.

15/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

SFR

Addressing Modes

The SFRs can only be addressed directly in the

address range from 80h to FFh. Table

15., page 28 gives an overview of the Special

Function Registers. Sixteen address in the SFRs

space are both-byte and bit-addressable. The bit-

addressable SFRs are those whose address ends

in 0h and 8h. The bit addresses in this area are

80h to FFh.

The addressing modes in uPSD323X Devices in-

struction set are as follows

■

Direct addressing

Indirect addressing

Register addressing

Register-specific addressing

Immediate constants addressing

Indexed addressing

Table 3. RAM Address

Byte Address

(in Hexadecimal)

Byte Address

(in Decimal)

(1) Direct addressing. In a direct addressing the

operand is specified by an 8-bit address field in the

instruction. Only internal Data RAM and SFRs

(80~FFH RAM) can be directly addressed.

↓

255

48

FFh

30h

msb

Example:

mov A, 3EH ; A <----- RAM[3E]

Bit Address (Hex)

lsb

Figure 11. Direct Addressing

2Fh 7F 7E 7D 7C 7B 7A 79 78 47

2Eh 77 76 75 74 73 72 71 70 46

2Dh 6F 6E 6D 6C 6B 6A 69 68 45

2Ch 67 66 65 64 63 62 61 60 44

2Bh 5F 5E 5D 5C 5B 5A 59 58 43

2Ah 57 56 55 54 53 52 51 50 42

29h 4F 4E 4D 4C 4B 4A 49 48 41

28h 47 46 45 44 43 42 41 40 40

27h 3F 3E 3D 3C 3B 3A 39 38 39

26h 37 36 35 34 33 32 31 30 38

25h 2F 2E 2D 2C 2B 2A 29 28 37

24h 27 26 25 24 23 22 21 20 36

23h 1F 1E 1D 1C 1B 1A 19 18 35

22h 17 16 15 14 13 12 11 10 34

21h 0F 0E 0D 0C 0B 0A 09 08 33

20h 07 06 05 04 03 02 01 00 32

Program Memory

A

3Eh

04

AI06641

(2) Indirect addressing. In indirect addressing

the instruction specifies a register which contains

the address of the operand. Both internal and ex-

ternal RAM can be indirectly addressed. The ad-

dress register for 8-bit addresses can be R0 or R1

of the selected register bank, or the Stack Pointer.

The address register for 16-bit addresses can only

be the 16-bit “data pointer” register, DPTR.

Example:

mov @R1, #40 H ;[R1] <-----40H

Figure 12. Indirect Addressing

1Fh

18h

17h

10h

0Fh

08h

07h

00h

31

24

23

16

15

8

Register Bank 3

Register Bank 2

Register Bank 1

Register Bank 0

Program Memory

55h

R1

40h

55

AI06642

7

0

16/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

(3) Register addressing. The register banks,

Arithmetic Instructions

containing registers R0 through R7, can be ac-

cessed by certain instructions which carry a 3-bit

register specification within the opcode of the in-

struction. Instructions that access the registers

this way are code efficient, since this mode elimi-

nates an address byte. When the instruction is ex-

ecuted, one of four banks is selected at execution

time by the two bank select bits in the PSW.

The arithmetic instructions is listed in Table

4., page 18. The table indicates the addressing

modes that can be used with each instruction to

access the <byte> operand. For example, the

ADD A, <byte> instruction can be written as:

ADD a, 7FH (direct addressing)

ADD A, @R0 (indirect addressing)

ADD a, R7 (register addressing)

ADD A, #127 (immediate constant)

Example:

mov PSW, #0001000B ; select Bank0

mov A, #30H

mov R1, A

Note: Any byte in the internal Data Memory space

can be incremented without going through the Ac-

cumulator.

One of the INC instructions operates on the 16-bit

Data Pointer. The Data Pointer is used to generate

16-bit addresses for external memory, so being

able to increment it in one 16-bit operations is

(4) Register-specific addressing. Some

in-

structions are specific to a certain register. For ex-

ample, some instructions always operate on the

Accumulator, or Data Pointer, etc., so no address

byte is needed to point it. The opcode itself does

that.

a useful feature.

The MUL AB instruction multiplies the Accumula-

tor by the data in the B register and puts the 16-bit

product into the concatenated B and Accumulator

registers.

The DIV AB instruction divides the Accumulator by

the data in the B register and leaves the 8-bit quo-

tient in the Accumulator, and the 8-bit remainder in

the B register.

In shift operations, dividing a number by 2n shifts

its “n” bits to the right. Using DIV AB to perform the

division completes the shift in 4?s and leaves the

B register holding the bits that were shifted out.

The DAA instruction is for BCD arithmetic opera-

tions. In BCD arithmetic, ADD and ADDC instruc-

tions should always be followed by a DAA

operation, to ensure that the result is also in BCD.

(5) Immediate constants addressing. The val-

ue of a constant can follow the opcode in Program

memory.

Example:

mov A, #10H.

(6) Indexed addressing. Only Program memory

can be accessed with indexed addressing, and it

can only be read. This addressing mode is intend-

ed for reading look-up tables in Program memory.

A 16-bit base register (either DPTR or PC) points

to the base of the table, and the Accumulator is set

up with the table entry number. The address of the

table entry in Program memory is formed by add-

ing the Accumulator data to the base pointer.

Example:

movc A, @A+DPTR

Note: DAA will not convert a binary number to

BCD. The DAA operation produces a meaningful

result only as the second step in the addition of

two BCD bytes.

Figure 13. Indexed Addressing

ACC

3Ah

DPTR

1E73h

Program Memory

3Eh

AI06643

17/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 4. Arithmetic Instructions

Addressing Modes

Mnemonic

Operation

Dir.

X

Ind.

X

Reg.

X

Imm

X

ADD A,<byte>

ADDC A,<byte>

SUBB A,<byte>

INC

A = A + <byte>

A = A + <byte> + C

A = A – <byte> – C

A = A + 1

X

Accumulator only

INC <byte>

INC DPTR

DEC

<byte> = <byte> + 1

DPTR = DPTR + 1

A = A – 1

X

Data Pointer only

Accumulator only

DEC <byte>

MUL AB

<byte> = <byte> – 1

B:A = B x A

X

Accumulator and B only

Accumulator only

A = Int[ A / B ]

B = Mod[ A / B ]

DIV AB

DA A

Decimal Adjust

Logical Instructions

Table 5., page 19 shows list of uPSD323X Devic-

es logical instructions. The instructions that per-

form Boolean operations (AND, OR, Exclusive

OR, NOT) on bytes perform the operation on a bit-

by-bit basis. That is, if the Accumulator contains

00110101B and byte contains 01010011B, then:

If the operation is in response to an interrupt, not

using the Accumulator saves the time and effort to

push it onto the stack in the service routine.

The Rotate instructions (RL A, RLC A, etc.) shift

the Accumulator 1 bit to the left or right. For a left

rotation, the MSB rolls into the LSB position. For a

right rotation, the LSB rolls into the MSB position.

ANL A, <byte>

will leave the Accumulator holding 00010001B.

The addressing modes that can be used to access

the <byte> operand are listed in Table 5., page 19.

The ANL A, <byte> instruction may take any of the

forms:

The SWAP A instruction interchanges the high

and low nibbles within the Accumulator. This is a

useful operation in BCD manipulations. For exam-

ple, if the Accumulator contains a binary number

which is known to be less than 100, it can be quick-

ly converted to BCD by the following code:

ANL A,7FH(direct addressing)

ANL A, @R1 (indirect addressing)

ANL A,R6 (register addressing)

ANL A,#53H (immediate constant)

MOVE B,#10

DIV AB

SWAP A

ADD A,B

Note: Boolean operations can be performed on

any byte in the internal Data Memory space with-

out going through the Accumulator. The XRL

<byte>, #data instruction, for example, offers a

quick and easy way to invert port bits, as in

Dividing the number by 10 leaves the tens digit in

the low nibble of the Accumulator, and the ones

digit in the B register. The SWAP and ADD instruc-

tions move the tens digit to the high nibble of the

Accumulator, and the ones digit to the low nibble.

XRL P1, #0FFH.

18/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 5. Logical Instructions

Mnemonic

Addressing Modes

Operation

Dir.

X

Ind.

Reg.

Imm

ANL A,<byte>

ANL <byte>,A

ANL <byte>,#data

ORL A,<byte>

ORL <byte>,A

ORL <byte>,#data

XRL A,<byte>

XRL <byte>,A

XRL <byte>,#data

CRL A

A = A .AND. <byte>

A = <byte> .AND. A

A = <byte> .AND. #data

A = A .OR. <byte>

A = <byte> .OR. A

A = <byte> .OR. #data

A = A .XOR. <byte>

A = <byte> .XOR. A

A = <byte> .XOR. #data

A = 00h

X

Accumulator only

CPL A

A = .NOT. A

RL A

Rotate A Left 1 bit

RLC A

RR A

Rotate A Left through Carry

Rotate A Right 1 bit

RRC A

SWAP A

Rotate A Right through Carry

Swap Nibbles in A

19/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Data Transfers

Internal RAM. Table 6 shows the menu of in-

structions that are available for moving data

around within the internal memory spaces, and the

addressing modes that can be used with each

one. The MOV <dest>, <src> instruction allows

data to be transferred between any two internal

RAM or SFR locations without going through the

Accumulator. Remember, the Upper 128 bytes of

data RAM can be accessed only by indirect ad-

dressing, and SFR space only by direct address-

ing.

Note: In uPSD323X Devices, the stack resides in

on-chip RAM, and grows upwards. The PUSH in-

struction first increments the Stack Pointer (SP),

then copies the byte into the stack. PUSH and

POP use only direct addressing to identify the byte

being saved or restored, but the stack itself is ac-

cessed by indirect addressing using the SP regis-

ter. This means the stack can go into the Upper

128 bytes of RAM, if they are implemented, but not

into SFR space.

The XCH A, <byte> instruction causes the Accu-

mulator and ad-dressed byte to exchange data.

The XCHD A, @Ri instruction is similar, but only

the low nibbles are involved in the exchange. To

see how XCH and XCHD can be used to facilitate

data manipulations, consider first the problem of

shifting and 8-digit BCD number two digits to the

right. Table 8., page 21 shows how this can be

done using XCH instructions. To aid in under-

standing how the code works, the contents of the

registers that are holding the BCD number and the

content of the Accumulator are shown alongside

each instruction to indicate their status after the in-

struction has been executed.

After the routine has been executed, the Accumu-

lator contains the two digits that were shifted out

on the right. Doing the routine with direct MOVs

uses 14 code bytes. The same operation with

XCHs uses only 9 bytes and executes almost

twice as fast. To right-shift by an odd number of

digits, a one-digit must be executed. Table

9., page 21 shows a sample of code that will right-

shift a BCD number one digit, using the XCHD in-

struction. Again, the contents of the registers hold-

ing the number and of the accumulator are shown

alongside each instruction.

The Data Transfer instructions include a 16-bit

MOV that can be used to initialize the Data Pointer

(DPTR) for look-up tables in Program Memory.

Table 6. Data Transfer Instructions that Access Internal Data Memory Space

Addressing Modes

Mnemonic

Operation

Dir.

X

Ind.

X

Reg.

X

Imm

MOV A,<src>

MOV <dest>,A

MOV <dest>,<src>

MOV DPTR,#data16

PUSH <src>

A = <src>

X

<dest> = A

X

X

DPTR = 16-bit immediate constant

INC SP; MOV “@SP”,<src>

MOV <dest>,”@SP”; DEC SP

Exchange contents of A and <byte>

Exchange low nibbles of A and @Ri

X

POP <dest>

XCH A,<byte>

XCHD A,@Ri

X

20/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

First, pointers R1 and R0 are set up to point to the

Table 7. Shifting a BCD Number Two Digits to

the Right (using direct MOVs: 14 bytes)

two bytes containing the last four BCD digits. Then

a loop is executed which leaves the last byte, loca-

tion 2EH, holding the last two digits of the shifted

number. The pointers are decremented, and the

loop is repeated for location 2DH. The CJNE in-

struction (Compare and Jump if Not equal) is a

loop control that will be described later. The loop

executed from LOOP to CJNE for R1 = 2EH, 2DH,

2CH, and 2BH. At that point the digit that was orig-

inally shifted out on the right has propagated to lo-

cation 2AH. Since that location should be left with

0s, the lost digit is moved to the Accumulator.

2A 2B 2C 2D 2E ACC

MOV A,2Eh

00

12

00

34

12

56

34

78

56

78

MOV 2Eh,2Dh 00

MOV 2Dh,2Ch 00

MOV 2Ch,2Bh 00

MOV 2Bh,#0

00

Table 8. Shifting a BCD Number Two Digits to

the Right (using direct XCHs: 9 bytes)

2A 2B 2C 2D

2E ACC

CLR

A

00

12

00

34

12

56

34

78

56

00

12

34

56

78

XCH A,2Bh

XCH A,2Ch

XCH A,2Dh

XCH A,2Eh

Table 9. Shifting a BCD Number One Digit to the Right

2A

2B

12

2C

2D

56

2E

78

ACC

MOV

R1,#2Eh

R0,#2Dh

00

34

xx

; loop for R1 = 2Eh

LOOP:

MOV

XCHD

SWAP

MOV

DEC

A,@R1

00

12

34

56

58

78

67

78

76

67

A,@R0

A

@R1,A

R1

DEC

R0

CNJE

R1,#2Ah,LOOP

; loop for R1 = 2Dh

; loop for R1 = 2Ch

; loop for R1 = 2Bh

00

08

12

18

01

38

23

45

67

45

23

01

CLR

XCH

A

08

00

01

23

45

67

00

08

A,2Ah

21/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

External RAM. Table 10 shows a list of the Data

Transfer instructions that access external Data

Memory. Only indirect addressing can be used.

The choice is whether to use a one-byte address,

@Ri, where Ri can be either R0 or R1 of the se-

The other MOVC instruction works the same way,

except the Program Counter (PC) is used as the

table base, and the table is accessed through a

subroutine. First the number of the desired en-try

is loaded into the Accumulator, and the subroutine

is called:

lected

register

bank,

or

a

two-byte

address, @DTPR.

MOV A , ENTRY NUMBER

CALL TABLE

The subroutine “TABLE” would look like this:

TABLE: MOVC A , @A+PC

RET

The table itself immediately follows the RET (re-

turn) instruction is Program Memory. This type of

table can have up to 255 entries, numbered 1

through 255. Number 0 cannot be used, because

at the time the MOVC instruction is executed, the

PC contains the address of the RET instruction.

An entry numbered 0 would be the RET opcode it-

self.

Note: In all external Data RAM accesses, the Ac-

cumulator is always either the destination or

source of the data.

Lookup Tables. Table 11 shows the two instruc-

tions that are available for reading lookup tables in

Program Memory. Since these instructions access

only Program Memory, the lookup tables can only

be read, not updated.

The mnemonic is MOVC for “move constant.” The

first MOVC instruction in Table 11 can accommo-

date a table of up to 256 entries numbered 0

through 255. The number of the desired entry is

loaded into the Accumulator, and the Data Pointer

is set up to point to the beginning of the table.

Then:

MOVC A, @A+DPTR

copies the desired table entry into the Accumula-

tor.

Table 10. Data Transfer Instruction that Access External Data Memory Space

Address Width

8 bits

Mnemonic

MOVX A,@Ri

Operation

READ external RAM @Ri

WRITE external RAM @Ri

READ external RAM @DPTR

WRITE external RAM @DPTR

8 bits

MOVX @Ri,A

16 bits

MOVX A,@DPTR

MOVX @DPTR,a

16 bits

Table 11. Lookup Table READ Instruction

Mnemonic

Operation

MOVC A,@A+DPTR

MOVC A,@A+PC

READ program memory at (A+DPTR)

READ program memory at (A+PC)

22/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Boolean Instructions

The uPSD323X Devices contain a complete Bool-

ean (single-bit) processor. One page of the inter-

nal RAM contains 128 address-able bits, and the

SFR space can support up to 128 addressable bits

as well. All of the port lines are bit-addressable,

and each one can be treated as a separate single-

bit port. The instructions that access these bits are

not just conditional branches, but a complete

menu of move, set, clear, complement, OR and

AND instructions. These kinds of bit operations

are not easily obtained in other architectures with

any amount of byte-oriented software.

The instruction set for the Boolean processor is

shown in Table 12. All bits accesses are by direct

addressing.

Bit addresses 00h through 7Fh are in the Lower

128, and bit ad-dresses 80h through FFh are in

SFR space.

addressed bit is set (JC, JB, JBC) or if the ad-

dressed bit is not set (JNC, JNB). In the above

case, Bit 2 is being tested, and if bit2 = 0, the CPL

C instruction is jumped over.

JBC executes the jump if the addressed bit is set,

and also clears the bit. Thus a flag can be tested

and cleared in one operation. All the PSW bits are

directly addressable, so the Parity Bit, or the gen-

eral-purpose flags, for example, are also available

to the bit-test instructions.

Table 12. Boolean Instructions

Mnemonic

ANL C,bit

ANL C,/bit

ORL C,bit

ORL C,/bit

MOV C,bit

MOV bit,C

CLR C

Operation

C = A .AND. bit

C = C .AND. .NOT. bit

C = A .OR. bit

C = C .OR. .NOT. bit

C = bit

Note how easily an internal flag can be moved to

a port pin:

MOV C,FLAG

MOV P1.0,C

In this example, FLAG is the name of any addres-

sable bit in the Lower 128 or SFR space. An I/O

line (the LSB of Port 1, in this case) is set or

cleared depending on whether the Flag Bit is '1' or

'0.'

The Carry Bit in the PSW is used as the single-bit

Accumulator of the Boolean processor. Bit instruc-

tions that refer to the Carry Bit as C assemble as

Carry-specific instructions (CLR C, etc.). The Car-

ry Bit also has a direct address, since it resides in

the PSW register, which is bit-addressable.

Note: The Boolean instruction set includes ANL

and ORL operations, but not the XRL (Exclusive

OR) operation. An XRL operation is simple to im-

plement in software. Suppose, for example, it is re-

quired to form the Exclusive OR of two bits:

bit = C

C = 0

CLR bit

bit = 0

SETB C

SETB bit

CPL C

C = 1

bit = 1

C = .NOT. C

bit = .NOT. bit

Jump if C =1

Jump if C = 0

Jump if bit =1

Jump if bit = 0

Jump if bit = 1; CLR bit

CPL bit

JC rel

JNC rel

JB bit,rel

JNB bit,rel

JBC bit,rel

C = bit 1 .XRL. bit2

The software to do that could be as follows:

MOV C , bit1

Relative Offset

The destination address for these jumps is speci-

fied to the assembler by a label or by an actual ad-

dress in Program memory. How-ever, the

destination address assembles to a relative offset

byte. This is a signed (two’s complement) offset

byte which is added to the PC in two’s complement

arithmetic if the jump is executed.

The range of the jump is therefore -128 to +127

Program Memory bytes relative to the first byte fol-

lowing the instruction.

JNB bit2, OVER

CPL C

OVER: (continue)

First, Bit 1 is moved to the Carry. If bit2 = 0, then

C now contains the correct result. That is, Bit 1

.XRL. bit2 = bit1 if bit2 = 0. On the other hand, if

bit2 = 1, C now contains the complement of the

correct result. It need only be inverted (CPL C) to

complete the operation.

This code uses the JNB instruction, one of a series

of bit-test instructions which execute a jump if the

23/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Jump Instructions

Table 13 shows the list of unconditional jump in-

structions. The table lists a single “JMP add” in-

struction, but in fact there are three SJMP, LJMP,

and AJMP, which differ in the format of the desti-

nation address. JMP is a generic mnemonic which

can be used if the programmer does not care

which way the jump is en-coded.

The SJMP instruction encodes the destination ad-

dress as a relative offset, as described above. The

instruction is 2 bytes long, consisting of the op-

code and the relative offset byte. The jump dis-

tance is limited to a range of -128 to +127 bytes

relative to the instruction following the SJMP.

The LJMP instruction encodes the destination ad-

dress as a 16-bit constant. The instruction is 3

bytes long, consisting of the opcode and two ad-

dress bytes. The destination address can be any-

where in the 64K Program Memory space.

The AJMP instruction encodes the destination ad-

dress as an 11-bit constant. The instruction is 2

bytes long, consisting of the opcode, which itself

contains 3 of the 11 address bits, followed by an-

other byte containing the low 8 bits of the destina-

tion address. When the instruction is executed,

these 11 bits are simply substituted for the low 11

bits in the PC. The high 5 bits stay the same.

Hence the destination has to be within the same

2K block as the instruction following the AJMP.

The RL A instruction converts the index number (0

through 4) to an even number on the range 0

through 8, because each entry in the jump table is

2 bytes long:

JUMP TABLE:

AJMP CASE 0

AJMP CASE 1

AJMP CASE 2

AJMP CASE 3

AJMP CASE 4

Table 13 shows a single “CALL addr” instruction,

but there are two of them, LCALL and ACALL,

which differ in the format in which the subroutine

address is given to the CPU. CALL is a generic

mnemonic which can be used if the programmer

does not care which way the address is encoded.

The LCALL instruction uses the 16-bit address for-

mat, and the subroutine can be anywhere in the

64K Program Memory space. The ACALL instruc-

tion uses the 11-bit format, and the subroutine

must be in the same 2K block as the instruction fol-

lowing the ACALL.

In any case, the programmer specifies the subrou-

tine address to the assembler in the same way: as

a label or as a 16-bit constant. The assembler will

put the address into the correct format for the giv-

en instructions.

In all cases the programmer specifies the destina-

tion address to the assembler in the same way: as

a label or as a 16-bit constant. The assembler will

put the destination address into the correct format

for the given instruction. If the format required by

the instruction will not support the distance to the

specified destination address, a “Destination out

of range” message is written into the List file.

The JMP @A+DPTR instruction supports case

jumps. The destination address is computed at ex-

ecution time as the sum of the 16-bit DPTR regis-

ter and the Accumulator. Typically. DPTR is set up

with the address of a jump table. In a 5-way

branch, for ex-ample, an integer 0 through 4 is

loaded into the Accumulator. The code to be exe-

cuted might be as follows:

Subroutines should end with a RET instruction,

which returns execution to the instruction following

the CALL.

RETI is used to return from an interrupt service

routine. The only difference between RET and

RETI is that RETI tells the interrupt control system

that the interrupt in progress is done. If there is no

interrupt in progress at the time RETI is executed,

then the RETI is functionally identical to RET.

Table 13. Unconditional Jump Instructions

Mnemonic

JMP addr

JMP @A+DPTR

CALL addr

RET

Operation

Jump to addr

Jump to A+DPTR

Call Subroutine at addr

Return from subroutine

Return from interrupt

No operation

MOV DPTR,#JUMP TABLE

MOV A,INDEX_NUMBER

RL A

JMP @A+DPTR

RETI

NOP

24/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 14 shows the list of conditional jumps avail-

Every time the loop was executed, R1 was decre-

mented, and the looping was to continue until the

R1 data reached 2Ah.

Another application of this instruction is in “greater

than, less than” comparisons. The two bytes in the

operand field are taken as unsigned integers. If the

first is less than the second, then the Carry Bit is

set (1). If the first is greater than or equal to the

second, then the Carry Bit is cleared

able to the uPSD323X Devices user. All of these

jumps specify the destination address by the rela-

tive offset method, and so are limited to a jump dis-

tance of -128 to +127 bytes from the instruction

following the conditional jump instruction. Impor-

tant to note, however, the user specifies to the as-

sembler the actual destination address the same

way as the other jumps: as a label or a 16-bit con-

stant.

There is no Zero Bit in the PSW. The JZ and JNZ

instructions test the Accumulator data for that con-

dition.

The DJNZ instruction (Decrement and Jump if Not

Zero) is for loop control. To execute a loop N

times, load a counter byte with N and terminate the

loop with a DJNZ to the beginning of the loop, as

shown below for N = 10:

Machine Cycles

A machine cycle consists of a sequence of six

states, numbered S1 through S6. Each state time

lasts for two oscillator periods. Thus, a machine

cycle takes 12 oscillator periods or 1µs if the oscil-

lator frequency is 12MHz. Refer to Figure

14., page 26.

Each state is divided into a Phase 1 half and a

Phase 2 half. State Sequence in uPSD323X De-

vices shows that retrieve/execute sequences in

states and phases for various kinds of instructions.

MOV COUNTER,#10

LOOP: (begin loop)

•

Normally two program retrievals are generated

during each machine cycle, even if the instruction

being executed does not require it. If the instruc-

tion being executed does not need more code

bytes, the CPU simply ignores the extra retrieval,

and the Program Counter is not incremented.

Execution of a one-cycle instruction (Figure

14., page 26) begins during State 1 of the machine

cycle, when the opcode is latched into the Instruc-

tion Register. A second retrieve occurs during S4

of the same machine cycle. Execution is complete

at the end of State 6 of this machine cycle.

The MOVX instructions take two machine cycles

to execute. No program retrieval is generated dur-

ing the second cycle of a MOVX instruction. This

is the only time program retrievals are skipped.

The retrieve/execute sequence for MOVX instruc-

tion is shown in Figure 14., page 26 (d).

(end loop)

DJNZ COUNTER, LOOP

(continue)

The CJNE instruction (Compare and Jump if Not

Equal) can also be used for loop control as in Ta-

ble 9., page 21. Two bytes are specified in the op-

erand field of the instruction. The jump is executed

only if the two bytes are not equal. In the example

of Table 9., page 21 Shifting a BCD Number One

Digits to the Right, the two bytes were data in R1

and the constant 2Ah. The initial data in R1 was

2Eh.

Table 14. Conditional Jump Instructions

Addressing Modes

Mnemonic

Operation

Dir.

Ind.

Reg.

Imm

JZ rel

Jump if A = 0

Jump if A ≠ 0

Accumulator only

X

JNZ rel

DJNZ <byte>,rel

CJNE A,<byte>,rel

CJNE <byte>,#data,rel

Decrement and jump if not zero

Jump if A ≠ <byte>

X

Jump if <byte> ≠ #data

X

25/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 14. State Sequence in uPSD323X Devices

S1

S2

S3

S4

S5

S6

S1

S2

S3

S4

S5

S6

Osc.

(XTAL2)

p1 p2 p1 p2 p1 p2 p1 p2 p1 p2 p1 p2 p1 p2 p1 p2 p1 p2 p1 p2 p1 p2 p1 p2

Read next

opcode and

discard

Read next

opcode

Read opcode

S1

S2

S3

S4

S5

S6

a. 1-Byte, 1-Cycle Instruction, e.g. INC A

Read next

opcode

Read 2nd

Byte

Read opcode

S1

S2

S3

S4

S5

b. 2-Byte, 1-Cycle Instruction, e.g. ADD A, adrs

Read next

opcode and

discard

Read next

opcode and

discard

Read next

opcode and

discard

Read next

opcode

Read opcode

S1

S2

S3

S4

S5

S1

S2

S3

S4

S5

S6

c. 1-Byte, 2-Cycle Instruction, e.g. INC DPTR

No Fetch

No ALE

No Fetch

Read next

opcode and

discard

Read next

opcode

Read opcode

(MOVX)

S1

S2

S3

S4

S5

Addr

S1

S2

S3

S4

S5

S6

Data

d. 1-Byte, 2-Cycle MOVX Instruction

Access External Memory

AI06822

26/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

uPSD3200 HARDWARE DESCRIPTION

The uPSD323X Devices has a modular architec-

ture with two main functional modules: the MCU

Module and the PSD Module. The MCU Module

consists of a standard 8032 core, peripherals and

other system supporting functions. The PSD Mod-

ule provides configurable Program and Data mem-

ories to the 8032 CPU core. In addition, it has its

own set of I/O ports and a PLD with 16 macrocells

for general logic implementation. Ports A,B,C, and

D are general purpose programmable I/O ports

that have a port architecture which is different from

Ports 0-4 in the MCU Module.

The PSD Module communicates with the CPU

Core through the internal address, data bus (A0-

A15, D0-D7) and control signals (RD_, WR_,

PSEN_ , ALE, RESET_). The user defines the De-

coding PLD in the PSDsoft Development Tool and

can map the resources in the PSD Module to any

program or data address space.

Figure 15. uPSD323X Devices Functional Modules

Port 1, Timers and

Port 3, UART,

Port 4 PWM

Dedicated

2

2nd UART and ADC

and DDC

USB Pins

Intr, Timers,I C

Port 3

Port 1

I2C

3 Timer /

8032 Core

4

USB

&

Transceiver

DDC

w/ 256 Byte

SRAM

PWM

5

Channels

Reset Logic

LVD & WDT

Channel

2 UARTs

ADC

Counters

256 Byte SRAM

Interrupt

MCU MODULE

Port 0, 2

Ext. Bus

8032 Internal Bus

A0-A15

RD,PSEN

WR,ALE

Reset

D0-D7

PSD MODULE

256Kb

Secondary

Flash

Bus

Interface

1Mb or 2Mb

Main Flash

64Kb

SRAM

Page Register

Decode PLD

PSD Internal Bus

VCC, GND,

JTAG ISP

CPLD - 16 MACROCELLS

XTAL

Port C,

JTAG, PLD I/O

and GPIO

Port A & B, PLD

I/O and GPIO

Port D

GPIO

Dedicated

Pins

AI06619C

27/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

MCU MODULE DISCRIPTION

This section provides a detail description of the

MCU Module system functions and Peripherals,

including:

■

ADC

I/O Ports

USB

■

Special Function Registers

Timers/Counter

Interrupts

PWM

Supervisory Function (LVD and Watchdog)

USART

Special Function Registers

A map of the on-chip memory area called the Spe-

cial Function Register (SFR) space is shown in Ta-

ble 15.

Note: In the SFRs not all of the addresses are oc-

cupied. Unoccupied addresses are not implement-

ed on the chip. READ accesses to these

addresses will in general return random data, and

WRITE accesses will have no effect. User soft-

ware should write '0s' to these unimplemented lo-

cations.

Power Saving Modes

2

I C Bus

On-chip Oscillator

Table 15. SFR Memory Map

F8

FF

F7

(1)

F0

E8

E0

D8

D0

C8

C0

B8

B0

A8

A0

98

90

88

80

B

(1)

UIEN

USCL

S1STA

UCON0

S1DAT

UCON1

S1ADR

UCON2

S2CON

USTA

UADR

UDT1

S2DAT

UDR0

UDT0

EF

E7

DF

D7

CF

C7

BF

B7

AF

A7

9F

97

UISTA

(1)

ACC

(1)

S2STA

S2ADR

S1CON

(1)

S1SETUP S2SETUP

RAMBUF DDCDAT DDCADR DDCCON

PSW

(1)

T2MOD

RCAP2L RCAP2H

TL2

TH2

T2CON

(1)

P4

(1)

IP

(1)

PSCL0L

PSCL0H

PWM4P

PWM0

PSCL1L PSCL1H

PWM4W

IPA

P3

(1)

WDKEY

WDRST

IE

(1)

PWMCON

SBUF

PWM1

SBUF2

P3SFS

TL1

PWM2

PWM3

IEA

P2

SCON

SCON2

(1)

P1SFS

TMOD

SP

P4SFS

TH0

ASCL

TH1

ADAT

ACON

P1

(1)

TL0

8F

87

TCON

(1)

DPL

DPH

PCON

P0

Note: 1. Register can be bit addressing

28/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 16. List of all SFR

SFR

Bit Register Name

Reset

Reg Name

Comments

Value

Addr

7

6

5

4

3

2

1

0

80

81

82

P0

SP

FF

07

Port 0

Stack Ptr

DPL

00 Data Ptr Low

Data Ptr

High

83

87

88

DPH

PCON

TCON

00

SMOD

TF1

SMOD1 LVREN ADSFINT RCLK1 TCLK1

PD

IE0

IDLE

IT0

00

Power Ctrl

Timer / Cntr

Control

TR1

C/T

TF0

M1

TR0

M0

IE1

IT1

Timer / Cntr

Mode

89

TMOD

Gate

C/T

M1

M0

00

Control

8A

8B

8C

8D

90

TL0

TL1

TH0

TH1

P1

00 Timer 0 Low

00 Timer 1 Low

00 Timer 0 High

00 Timer 1 High

FF

00

Port 1

Port 1 Select

Register

91

93

94

P1SFS

P3SFS

P4SFS

P1S7

P3S7

P4S7

P1S6

P3S6

P4S6

P1S5

P4S5

P1S4

P4S4

Port 3 Select

Register

00

Port 4 Select

Register

P4S3

P4S2

P4S1

P4S0

8-bit

95

ASCL

00 Prescaler for

ADC clock

ADC Data

00

96

97

ADAT

ADAT7

ADAT6 ADAT5 ADAT4 ADAT3 ADAT2 ADAT1 ADAT0

Register

ADC Control

Register

ACON

ADEN

SM2

ADS1

TB8

ADS0

RB8

ADST

TI

ADSF

RI

00

Serial

98

SCON

SM0

SM1

REN

00

Control

Register

99

9A

SBUF

00 Serial Buffer

2nd UART

00

SCON2

SM2

TB8

RB8

TI

RI

Ctrl Register

2nd UART

00

9B

A0

SBUF2

P2

Serial Buffer

FF

00

Port 2

PWM

Control

Polarity

A1 PWMCON PWML

PWMP PWME CFG4

CFG3

CFG2

CFG1

CFG0

29/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Bit Register Name

SFR

Reset

Value

Reg Name

Addr

Comments

7

6

5

4

3

2

1

0

PWM0

A2

A3

A4

A5

PWM0

PWM1

PWM2

PWM3

00 Output Duty

Cycle

PWM1

00 Output Duty

Cycle

PWM2

00 Output Duty

Cycle

PWM3

00 Output Duty

Cycle

Watch Dog

A6 WDRST

00

Reset

Interrupt

00

2

A7

IEA

IE

EDDC

EA

ES2

ES

EUSB

EX0

EI C

Enable (2nd)

Interrupt

A8

A9

-

ET2

ET1

EX1

ET0

00

Enable

PWM 4

Period

AA PWM4P

AB PWM4W

AE WDKEY

00

PWM 4

00

Pulse Width

Watch Dog

00

Key Register

B0

P3

FF

00

Port 3

Prescaler 0

Low (8-bit)

B1 PSCL0L

B2 PSCL0H

B3 PSCL1L

B4 PSCL1H

Prescaler 0

High (8-bit)

00

Prescaler 1

Low (8-bit)

Prescaler 1

High (8-bit)

Interrupt

Priority (2nd)

B7

IPA

PDDC

PS2

PS

PI2C

PT0

PUSB

PX0

Interrupt

Priority

B8

C0

C8

IP

P4

PT2

PT1

PX1

TR2

FF New Port 4

Timer 2

Control

T2CON

TF2

EXF2

RCLK

TCLK

EXEN2

C/T2

CP/RL2 00

DCEN 00

Timer 2

Mode

C9 T2MOD

30/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Bit Register Name

Reset

SFR

Addr

Reg Name

Comments

Value

7

6

5

4

3

2

1

0

Timer 2

Reload low

CA RCAP2L

CB RCAP2H

00

Timer 2

Reload High

Timer 2 Low

byte

CC

CD

D0

TL2

TH2

PSW

Timer 2 High

byte

Program

Status Word

CY

AC

FO

RS1

RS0

OV

P

2

DDC I C

D1 S1SETUP

(S1) Setup

2

I C (S2)

D2 S2SETUP

D4 RAMBUF

D5 DDCDAT

D6 DDCADR

D7 DDCCON

00

XX

00

Setup

DDC Ram

Buffer

DDC Data

xmit register

Addr pointer

register

DDC Control

Register

—

EX_DAT SWENB DDC_AX DDCINT DDC1EN SWHINT

M0

CR0

SLV

2

DDC I C

Control Reg

D8

D9

DA

DB

S1CON

S1STA

S1DAT

S1ADR

CR2

GC

ENI1

Stop

STA

Intr

STO

ADDR

Bbusy

AA

CR1

2

DDC I C

Status

TX-Md

Blost

ACK_R

00

Data Hold

Register

2

DDC I C

address

2

I C Bus

DC S2CON

CR2

GC

EN1

Stop

STA

Intr

STO

ADDR

Bbusy

AA

CR1

CR0

SLV

Control Reg

2

I C Bus

DD

DE

S2STA

S2DAT

TX-Md

Blost

ACK_R

Status

Data Hold

Register

00

2

DF

E0

S2ADR

ACC

I C address

00 Accumulator

8-bit

00 Prescaler for

USB logic

E1

E6

USCL

UDT1

USB Endpt1

UDT1.7 UDT1.6 UDT1.5 UDT1.4 UDT1.3 UDT1.2 UDT1.1 UDT1.0 00

Data Xmit

31/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Bit Register Name

SFR

Reset

Value

Reg Name

Addr

Comments

7

6

5

4

3

2

1

0

USB Endpt0

Data Xmit

E7

E8

UDT0

UISTA

UDT0.7 UDT0.6 UDT0.5 UDT0.4 UDT0.3 UDT0.2 UDT0.1 UDT0.0 00

USB

Interrupt

Status

SUSPND

—

RSTF TXD0F RXD0F RXD1F EOPF RESUMF 00

USB

Interrupt

Enable

SUSPNDI

E

RESUMI

E9

UIEN

RSTE RSTFIE TXD0IE RXD0IE TXD1IE EOPIE

00

E

USB Endpt0

Xmit Control

EA UCON0

EB UCON1

EC UCON2

TSEQ0 STALL0 TX0E

RX0E TP0SIZ3 TP0SiZ2 TP0SIZ1 TP0SIZ0 00

FRESUM TP1SIZ3 TP1SiZ2 TP1SIZ1 TP1SIZ0 00

USB Endpt1

Xmit Control

TSEQ1 EP12SEL

—

IN

USB Control

Register

—

SOUT

EP2E

EP1E STALL2 STALL1 00

USB Endpt0

Status

ED

EE

USTA

RSEQ

SETUP

OUT RP0SIZ3 RP0SIZ2 RP0SIZ1 RP0SIZ0 00

USB

Address

Register

UADR

USBEN UADD6 UADD5 UADD4 UADD3 UADD2 UADD1 UADD0

00

USB Endpt0

Data Recv

EF

F0

UDR0

B

UDR0.7 UDR0.6 UDR0.5 UDR0.4 UDR0.3 UDR0.2 UDR0.1 UDR0.0 00

00

B Register

32/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 17. PSD Module Register Address Offset

CSIOP

Addr Register Name

Offset

Bit Register Name

Reset

Value

Comments

7

6

5

4

3

2

1

0

00

02

04

06

Data In (Port A)

Reads Port pins as input

Control (Port A) Configure pin between I/O or Address Out Mode. Bit = 0 selects I/O

00

Data Out (Port A)

Direction (Port A)

Latched data for output to Port pins, I/O Output Mode

Configures Port pin as input or output. Bit = 0 selects input

Configures Port pin between CMOS, Open Drain or Slew rate. Bit =

0 selects CMOS

08

0A

0C

Drive (Port A)

00

Input Macrocell

(Port A)

Reads latched value on Input Macrocells

Enable Out

(Port A)

Reads the status of the output enable control to the Port pin driver.

Bit = 0 indicates pin is in input mode.

01

03

05

07

09

Data In (Port B)

Control (Port B)

Data Out (Port B)

Direction (Port B)

Drive (Port B)

00

Input Macrocell

(Port B)

0B

Enable Out

(Port B)

0D

10

12

Data In (Port C)

Data Out (Port

C)

00

14

16

Direction (Port C)

Drive (Port C)

00

Input Macrocell

(Port C)

18

1A

11

13

15

17

1B

20

Enable Out

(Port C)

Only Bit 1 and

2 are used

Data In (Port D)

*

Data Out (Port

D)

Only Bit 1 and

2 are used

00

Only Bit 1 and

2 are used

Direction (Port D)

Drive (Port D)

Only Bit 1 and

2 are used

Enable Out

(Port D)

Only Bit 1 and

2 are used

Output

Macrocells AB

33/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

CSIOP

Addr Register Name

Offset

Bit Register Name

Reset

Value

Comments

7

6

5

4

3

2

1

0

Output

21

Macrocells BC

Mask Macrocells

22

AB

Mask Macrocells

23

BC

Primary Flash

Protection

Sec7_ Sec6_ Sec5_ Sec4_ Sec3_ Sec2_ Sec1_ Sec0_

Bit = 1 sector

is protected

C0

Prot

Security Bit =

1 device is

secured

Secondary Flash Security

Sec3_ Sec2_ Sec1_ Sec0_

C2

B0

*

Protection

_Bit

Prot

*

PLD

Mcells array-

clk

PLD

Control PLD

power

consumption

PLD

Turbo

APD

enable

PMMR0

*

00

clk

PLD

array

Ale

PLD

Blocking

inputs to PLD

array

B4

E0

PMMR2

Page

*

array array array

Cntl2 Cntl1 Cntl0

*

00

Page Register

Configure

8032 Program

and Data

Periph-

mode

FL_ Boot_ FL_

Boot_

code

SR_

code

E2

VM

*

data

data code

Space

Note: (Register address = csiop address + address offset; where csiop address is defined by user in PSDsoft)

* indicates bit is not used and need to set to '0.'

34/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

INTERRUPT SYSTEM

There are interrupt requests from 10 sources as

follows.

External Int1

–

The INT1 can be either level active or

■

INT0 external interrupt

2nd USART Interrupt

Timer 0 Interrupt

I C Interrupt

INT1 External Interrupt (or ADC Interrupt)

DDC Interrupt

Timer 1 Interrupt

USB Interrupt

USART Interrupt

Timer 2 Interrupt

transition active depending on Bit IT1 in

register TCON. The flag that actually

generates this interrupt is Bit IE1 in TCON.

When an external interrupt is generated, the

corresponding request flag is cleared by the

hardware when the service routine is vectored

to only if the interrupt was transition activated.

If the interrupt was level activated then the

interrupt request flag remains set until the

requested interrupt is actually generated.

Then it has to deactivate the request before

the interrupt service routine is completed, or

else another interrupt will be generated.

2

External Int0

–

The ADC can take over the External INT1 to

generate an interrupt on conversion being

completed

–

The INT0 can be either level-active or

transition-active depending on Bit IT0 in

register TCON. The flag that actually

generates this interrupt is Bit IE0 in TCON.

When an external interrupt is generated, the

corresponding request flag is cleared by the

hardware when the service routine is vectored

to only if the interrupt was transition activated.

If the interrupt was level activated then the

interrupt request flag remains set until the

requested interrupt is actually generated.

Then it has to deactivate the request before

the interrupt service routine is completed, or

else another interrupt will be generated.

DDC Interrupt

–

The DDC Interrupt is generated either by Bit

INTR in the S1STA register for DC2B protocol

or by Bit DDC Interrupt in the DDCCON

register for DDC1 protocol or by Bit SWHINT

Bit in the DDCCON register when DDC

protocol is changed from DDC1 to DDC2.

Flags except the INTR have to be cleared by

the software. INTR flag is cleared by

hardware.

–

USB Interrupt

Timer 0 and 1 Interrupts

–

The USB Interrupt is generated when

Timer 0 and Timer 1 Interrupts are generated

by TF0 and TF1 which are set by an overflow

of their respective Timer/Counter registers

(except for Timer 0 in Mode 3).

These flags are cleared by the internal

hardware when the interrupt is serviced.

endpoint0 has transmitted a packet or

received a packet, when endpoint1 or

endpoint2 has transmitted a packet, when the

suspend or resume state is detected and

every EOP received.

When the USB Interrupt is generated, the

corresponding request flag must be cleared by

software. The interrupt service routine will

have to check the various USB registers to

determine the source and clear the

corresponding flag.

–

Timer 2 Interrupt

–

Timer 2 Interrupt is generated by TF2 which is

set by an overflow of Timer 2. This flag has to

be cleared by the software - not by hardware.

It is also generated by the T2EX signal (Timer

2 External Interrupt P1.1) which is controlled

by EXEN2 and EXF2 Bits in the T2CON

register.

–

Please see the dedicated interrupt control

registers for the USB peripheral for more

information.

2

I C Interrupt

2

–

The interrupt of the I C is generated by Bit

INTR in the register S2STA.

–

This flag is cleared by hardware.

35/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

USART Interrupt

–

The USART Interrupt is generated by RI

(receive interrupt) OR TI (transmit interrupt).

determine the source and clear the

corresponding flag.

–

When the USART Interrupt is generated, the

corresponding request flag must be cleared by

software. The interrupt service routine will

have to check the various USART registers to

–

Both USART’s are identical, except for the

additional interrupt controls in the Bit 4 of the

additional interrupt control registers (A7H,

B7H)

Figure 16. Interrupt System

IP / IPA Priority

Interrupt

IE /

Sources

High

Low

INT0

USART

Timer

0

I2C

INT1

DDC

Timer

1

USB

2nd

USART

Timer

2

Global

Enable

AI06646

Table 18. SFR Register

Bit Register Name

SFR

Addr Name

Reg

Reset

Comments

Value

7

6

5

4

3

2

1

0

Interrupt

Enable (2nd)

2

A7

A8

B7

B8

IEA

IE

EDDC

—

ES2

—

EUSB

00

EI C

Interrupt

Enable

EA

PDDC

—

ET2

—

ES

PS2

PS

ET1

—

EX1

—

ET0

EX0

PUSB

PX0

Interrupt

Priority (2nd)

2

IPA

IP

PI C

Interrupt

Priority

PT2

PT1

PX1

PT0

36/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Interrupt Priority Structure

Each interrupt source can be assigned one of two

priority levels. Interrupt priority levels are defined

by the interrupt priority special function register IP

and IPA.

0 = low priority

1 = high priority

A low priority interrupt may be interrupted by a

high priority interrupt level interrupt. A high priority

interrupt routine cannot be interrupted by any oth-

er interrupt source. If two interrupts of different pri-

ority occur simultaneously, the high priority level

request is serviced. If requests of the same priority

are received simultaneously, an internal polling

sequence determines which request is serviced.

Thus, within each priority level, there is a second

priority structure determined by the polling se-

quence.

interrupt source can also be globally disabled by

clearing Bit EA in IE.

Table 19. Priority Levels

Source

Int0

Priority with Level

0 (highest)

2nd USART

Timer 0

I²C

1

2

3

Int1

4

DDC

5

Timer 1

USB

6

7

8

Interrupts Enable Structure

1st USART

Timer 2+EXF2

Each interrupt source can be individually enabled

or disabled by setting or clearing a bit in the inter-

rupt enable special function register IE and IEA. All

9 (lowest)

Table 20. Description of the IE Bits

Bit

Symbol

Function

Disable all interrupts:

0: no interrupt with be acknowledged

1: each interrupt source is individually enabled or disabled by setting or clearing its

enable bit

7

EA

6

5

4

3

2

1

0

—

Reserved

ET2

ES

Enable Timer 2 Interrupt

Enable USART Interrupt

Enable Timer 1 Interrupt

Enable external Interrupt (Int1)

Enable Timer 0 Interrupt

Enable external Interrupt (Int0)

ET1

EX1

ET0

EX0

Table 21. Description of the IEA Bits

Bit

7

Symbol

EDDC

—

Function

Enable DDC Interrupt

Not used

6

5

—

Not used

4

ES2

—

Enable 2nd USART Interrupt

Not used

3

2

—

Not used

1

EI2C

EUSB

Enable I²C Interrupt

Enable USB Interrupt

0

37/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 22. Description of the IP Bits

Bit

7

Symbol

—

Function

Reserved

6

—

Reserved

5

PT2

PS

Timer 2 Interrupt priority level

USART Interrupt priority level

Timer 1 Interrupt priority level

External Interrupt (Int1) priority level

Timer 0 Interrupt priority level

External Interrupt (Int0) priority level

4

3

PT1

PX1

PT0

PX0

2

1

0

Table 23. Description of the IPA Bits

Bit

7

Symbol

PDDC

—

Function

DDC Interrupt priority level

Not used

6

5

—

Not used

4

PS2

—

2nd USART Interrupt priority level

Not used

3

2

—

Not used

1

PI2C

PUSB

I²C Interrupt priority level

USB Interrupt priority level

0

38/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

How Interrupts are Handled

The interrupt flags are sampled at S5P2 of every

machine cycle. The samples are polled during fol-

lowing machine cycle. If one of the flags was in a

set condition at S5P2 of the preceding cycle, the

polling cycle will find it and the interrupt system will

generate an LCALL to the appropriate service rou-

tine, provided this H/W generated LCALL is not

blocked by any of the following conditions:

Execution proceeds from that location until the

RETI instruction is encountered. The RETI instruc-

tion informs the processor that the interrupt routine

is no longer in progress, then pops the top two

bytes from the stack and reloads the Program

Counter. Execution of the interrupted program

continues from where it left off.

Note: A simple RET instruction would also return

execution to the interrupted program, but it would

have left the interrupt control system thinking an

interrupt was still in progress, making future inter-

rupts impossible.

–

An interrupt of equal priority or higher priority

level is already in progress.

The current machine cycle is not the final cycle

in the execution of the instruction in progress.

The instruction in progress is RETI or any

access to the interrupt priority or interrupt

enable registers.

Table 24. Vector Addresses

Source

Int0

Vector Address

0003h

The polling cycle is repeated with each machine

cycle, and the values polled are the values that

were present at S5P2 of the previous machine cy-

cle.

2nd USART

Timer 0

I²C

004Bh

000Bh

Note: If an interrupt flag is active but being re-

sponded to for one of the above mentioned condi-

tions, if the flag is still inactive when the blocking

condition is removed, the denied interrupt will not

be serviced. In other words, the fact that the inter-

rupt flag was once active but not serviced is not re-

membered. Every polling cycle is new.

The processor acknowledges an interrupt request

by executing a hardware generated LCALL to the

appropriate service routine. The hardware gener-

ated LCALL pushes the contents of the Program

Counter on to the stack (but it does not save the

PSW) and reloads the PC with an address that de-

pends on the source of the interrupt being vec-

tored to as shown in Table 24.

0043h

Int1

0013h

DDC

003Bh

Timer 1

USB

001Bh

0033h

1st USART

Timer 2+EXF2

0023h

002Bh

39/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

POWER-SAVING MODE

Two software selectable modes of reduced power

consumption are implemented.

Idle Mode

■

USART

8-bit ADC

2

I C Interface

The following Functions are Switched Off.

Note: Interrupt or RESET terminates the Idle

■

CPU (Halted)

Mode.

The following Function Remain Active During Idle

Mode.

Power-Down Mode

■

System Clock Halted

LVD Logic Remains Active

SRAM contents remains unchanged

The SFRs retain their value until a RESET is

asserted

■

External Interrupts

Timer 0, Timer 1, Timer 2

DDC Interface

PWM Units

USB Interface

Note: The only way to exit Power-down Mode is a

RESET.

Table 25. Power-Saving Mode Power Consumption

2

Mode

Idle

Addr/Data

Maintain Data

Ports1,3,4

Maintain Data

PWM

Active

Disable

DDC

Active

Disable

USB

Active

Disable

I C

Active

Disable

Power-down

Power Control Register

The Idle and Power-down Modes are activated by software via the PCON register.

Table 26. Pin Status During Idle and Power-down Mode

Bit Register Name

SFR

Reg

Reset

Value

Comments

Addr Name

7

6

5

4

3

2

1

0

87

PCON

SMOD

SMOD1 LVREN ADSFINT RCLK1 TCLK1

PD

IDLE

00

Power Ctrl

Table 27. Description of the PCON Bits

Bit

7

Symbol

SMOD

Function

Double baud data rate bit UART

Double baud data rate bit 2nd UART

LVR disable bit (active High)

Enable ADC Interrupt

6

SMOD1

LVREN

5

4

ADSFINT

(1)

3

Received clock flag (UART 2)

Transmit clock flag (UART 2)

RCLK1

(1)

2

1

0

TCLK1

PD

Activate Power-down Mode (High enable)

Activate Idle Mode (High enable)

IDL

Note: 1. See the T2CON register for details of the flag description

40/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Idle Mode

The instruction that sets PCON.0 is the last in-

struction executed in the normal operating mode

before Idle Mode is activated. Once in the Idle

Mode, the CPU status is preserved in its entirety:

Stack pointer, Program counter, Program status

word, Accumulator, RAM and All other registers

maintain their data during Idle Mode.

–

External hardware reset: the hardware reset is

required to be active for two machine cycle to

complete the RESET operation.

Internal reset: the microcontroller restarts after

3 machine cycles in all cases.

Power-Down Mode

The instruction that sets PCON.1 is the last exe-

cuted prior to going into the Power-down Mode.

Once in Power-down Mode, the oscillator is

stopped. The contents of the on-chip RAM and the

Special Function Register are preserved.

There are three ways to terminate the Idle Mode.

–

Activation of any enabled interrupt will cause

PCON.0 to be cleared by hardware

terminating Idle mode. The interrupt is

serviced, and following return from interrupt

instruction RETI, the next instruction to be

executed will be the one which follows the

instruction that wrote a logic '1' to PCON.0.

The Power-down Mode can be terminated by an

external RESET.

41/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

I/O PORTS (MCU MODULE)

The MCU Module has five ports: Port 0, Port 1,

Port 2, Port 3, and Port 4. (Refer to the PSD Mod-

ule section on I/O ports A,B,C and D). Ports P0

and P2 are dedicated for the external address and

data bus and is not available in the 52-pin package

devices.

functions are controlled using the P1SFS register,

except for Timer 2 and the 2nd UART which are

enabled by their configuration registers. P1.0 to

P1.3 are default to GPIO after reset.

Port 3 pins 6 and 7 have been modified from the

standard 8032. These pins that were used for

READ and WRITE control signals are now GPIO

Port 1 - Port 3 are the same as in the standard

8032 micro-controllers, with the exception of the

additional special peripheral functions. All ports

are bi-directional. Pins of which the alternative

function is not used may be used as normal bi-di-

rectional I/O.

The use of Port 1- Port 4 pins as alternative func-

tions are carried out automatically by the

uPSD323X Devices provided the associated SFR

Bit is set HIGH.

2

or I C bus pins. The READ and WRITE pins are

assigned to dedicated pins.

2

Port 3 (I C) and Port 4 alternate functions are con-

trolled using the P3SFS and P4SFS Special Func-

tion Selection registers. After a reset, the I/O pins

default to GPIO. The alternate function is enabled

if the corresponding bit in the PXSFS register is

set to '1.' Other Port 3 alternative functions (UART,

Interrupt, and Timer/Counter) are enabled by their

configuration register and do not require setting of

the bits in P3SFS.

The following SFR registers (Tables 29, 30, and

31) are used to control the mapping of alternate

functions onto the I/O port bits. Port 1 alternate

Table 28. I/O Port Functions

Port Name

Main Function

Alternate

Timer 2 - Bits 0,1

2nd UART - Bits 2,3

ADC - Bits 4..7

Port 1

GPIO

UART - Bits 0,1

Interrupt - Bits 2,3

Timers - Bits 4,5

Port 3

GPIO

2

I C - Bits 6,7

DDC - Bits 0..2

PWM - Bits 3..7

Port 4

USB +/-

USB +/- Only

Table 29. P1SFS (91H)

7

6

5

4

3

2

1

0

0=Port 1.7

1=ACH3

0=Port 1.6

1=ACH2

0=Port 1.5

1=ACH1

0=Port 1.4

1=ACH0

Bits Reserved

Table 30. P3SFS (93H)

7

6

5

4

3

1

0 = Port 3.7 0 = Port 3.6

1 = SCL

1 = SDA

Bits are reserved.

2

from I C unit from I C unit

Table 31. P4SFS (94H)

7

6

5

4

3

2

1

0

0=Port 4.1

1=DDC -

SCL

0=Port 4.0

1=DDC -

SDA

0=Port 4.2

0=Port 4.7

1=PWM 4

0=Port 4.6

1=PWM 3

0=Port 4.5

1=PWM 2

0=Port 4.4

1=PWM 1

0=Port 4.3

1=PWM 0

1=V

SYNC

42/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PORT Type and Description

Figure 17. PORT Type and Description (Part 1)

In /

Out

Symbol

RESET

Circuit

Description

I

• Schmitt input with internal pull-up

CMOS compatible interface

NFC : 400ns

NFC

WR, RD,ALE,

PSEN

O

Output only

XTAL1,

XTAL2

I

On-chip oscillator

On-chip feedback resistor

Stop in the power down mode

External clock input available

CMOS compatible interface

xon

O

Bidirectional I/O port

Schmitt input

PORT0

I/O

Address Output ( Push-Pull )

CMOS compatible interface

AI06653

43/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 18. PORT Type and Description (Part 2)

In/

Out

Symbol

Circuit

Function

PORT1 <3:0>,

PORT3,

PORT4<7:3,1:0>

Bidirectional I/O port with internal

pull-ups

Schmitt input

I/O

CMOS compatible interface

PORT2

Bidirectional I/O port with internal

pull-ups

PORT1 < 7:4 >

I/O

Schmitt input

CMOS compatible interface

Analog input option

an_enb

Bidirectional I/O port with internal

pull-ups

I/O

PORT4.2

Schmitt input.

TTL compatible interface

Pull-up when reset

Address Latch Enable

Program Strobe Enable

Bidirectional I/O port

Schmitt input

TTL compatible interface

USB - ,

USB +

I/O

+

–

AI06654

44/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

OSCILLATOR

The oscillator circuit of the uPSD323X Devices is

a single stage inverting amplifier in a Pierce oscil-

lator configuration. The circuitry between XTAL1

and XTAL2 is basically an inverter biased to the

transfer point. Either a crystal or ceramic resonator

can be used as the feedback element to complete

the oscillator circuit. Both are operated in parallel

resonance.

XTAL1 is the high gain amplifier input, and XTAL2

is the output. To drive the uPSD323X Devices ex-

ternally, XTAL1 is driven from an external source

and XTAL2 left open-circuit.

Figure 19. Oscillator

XTAL1

XTAL2

XTAL1

XTAL2

8 to 40 MHz

External Clock

AI06620

SUPERVISORY

There are four ways to invoke a reset and initialize

the uPSD323X Devices.

The RESET mechanism is illustrated in Figure 20.

Each RESET source will cause an internal reset

signal active. The CPU responds by executing an

internal reset and puts the internal registers in a

defined state. This internal reset is also routed as

an active low reset input to the PSD Module.

■

Via the external RESET pin

Via the internal LVR Block.

Via USB bus reset signaling.

Via Watch Dog timer

Figure 20. RESET Configuration

Reset

CPU

&

Noise

Cancel

CPU

Clock

PERI.

Sync

WDT

LVR

S

Q

R

RSTE

10ms

Timer

PSD_RST

“Active Low

10ms at 40Mhz

50ms at 8Mhz

USB Reset

AI06621

45/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

External Reset

Watchdog Timer Overflow

The RESET pin is connected to a Schmitt trigger

for noise reduction. A RESET is accomplished by

holding the RESET pin LOW for at least 1ms at

power up while the oscillator is running. Refer to

AC spec on other RESET timing requirements.

The Watchdog timer generates an internal reset

when its 22-bit counter overflows. See Watchdog

Timer section for details.

USB Reset

The USB reset is generated by a detection on the

USB bus RESET signal. A single-end zero on its

upstream port for 4 to 8 times will set RSTF Bit in

UISTA register. If Bit 6 (RSTE) of the UIEN Regis-

ter is set, the detection will also generate the

RESET signal to reset the CPU and other periph-

erals in the MCU.

Low V Voltage Reset

DD

An internal reset is generated by the LVR circuit

when the V drops below the reset threshold. Af-

DD

ter V

reaching back up to the reset threshold,

DD

the RESET signal will remain asserted for 10ms

before it is released. On initial power-up the LVR

is enabled (default). After power-up the LVR can

be disabled via the LVREN Bit in the PCON Reg-

ister.

Note: The LVR logic is still functional in both the

Idle and Power-down Modes.

The reset threshold:

■

5V operation: 4V +/- 0.25V

3.3V operation: 2.5V +/-0.2V

■

This logic supports approximately 0.1V of hystere-

sis and 1µs noise-cancelling delay.

46/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

WATCHDOG TIMER

The hardware watchdog timer (WDT) resets the

uPSD323X Devices when it overflows. The WDT

is intended as a recovery method in situations

where the CPU may be subjected to a software

upset. To prevent a system reset the timer must be

reloaded in time by the application software. If the

processor suffers a hardware/software malfunc-

tion, the software will fail to reload the timer. This

failure will result in a reset upon overflow thus pre-

venting the processor running out of control.

40MHz). To reset the WDT the user must write a

value between 00-7EH to the WDRST register.

The value that is written to the WDRST is loaded

to the 7MSB of the 22-bit counter. This allows the

user to pre-loaded the counter to an initial value to

generate a flexible Watchdog time out period.

Writing a “00” to WDRST clears the counter.

The watchdog timer is controlled by the watchdog

key register, WDKEY. Only pattern 01010101

(=55H), disables the watchdog timer. The rest of

pattern combinations will keep the watchdog timer

enabled. This security key will prevent the watch-

dog timer from being terminated abnormally when

the function of the watchdog timer is needed.

In the Idle Mode the watchdog timer and reset cir-

cuitry remain active. The WDT consists of a 22-bit

counter, the Watchdog Timer RESET (WDRST)

SFR and Watchdog Key Register (WDKEY).

Since the WDT is automatically enabled while the

processor is running. the user only needs to be

concerned with servicing it.

The 22-bit counter overflows when it reaches

4194304 (3FFFFFH). The WDT increments once

every machine cycle.

In Idle Mode, the oscillator continues to run. To

prevent the WDT from resetting the processor

while in Idle, the user should always set up a timer

that will periodically exit Idle, service the WDT, and

re-enter Idle Mode.

Watchdog reset pulse width depends on the clock

22

frequency. The reset period is Tf

x 12 x 2 .

OSC

This means the user must reset the WDT at least

every 4194304 machine cycles (1.258 seconds at

15

The RESET pulse width is Tf

OSC

Table 32. Watchdog Timer Key Register (WDKEY: 0AEH)

7

6

5

4

3

2

1

0

WDKEY0

WDKEY7

WDKEY6

WDKEY5

WDKEY4

WDKEY3

WDKEY2

WDKEY1

Table 33. Description of the WDKEY Bits

Bit

Symbol

Function

WDKEY7 to Enable or disable watchdog timer.

WDKEY0 01010101 (=55h): disable watchdog timer. Others: enable watchdog timer

7 to 0

47/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 21. RESET Pulse Width

Reset pulse width (about 10ms at 40Mhz, about 50ms at 8Mhz)

Reset period

(1.258 second at 40Mhz)

(about 6.291 seconds at 8Mhz)

AI06823

Table 34. Watchdog Timer Clear Register (WDRST: 0A6H)

7

6

5

4

3

2

1

0

Reserved

WDRST6

WDRST5

WDRST4

WDRST3

WDRST2

WDRST1

WDRST0

Table 35. Description of the WDRST Bits

Bit

Symbol

Function

7

—

Reserved

To reset watchdog timer, write any value beteen 00h and 7Eh to this register.

This value is loaded to the 7 most significant bits of the 22-bit counter.

For example: MOV WDRST,#1EH

WDRST6 to

WDRST0

6 to 0

Note: The Watchdog Timer (WDT) is enabled at power-up or reset and must be served or disabled.

48/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

TIMER/COUNTERS (TIMER 0, TIMER 1 AND TIMER 2)

The uPSD323X Devices has three 16-bit Timer/

Counter registers: Timer 0, Timer 1 and Timer 2.

All of them can be configured to operate either as

timers or event counters and are compatible with

standard 8032 architecture.

In the “Timer” function, the register is incremented

every machine cycle. Thus, one can think of it as

counting machine cycles. Since a machine cycle

consists of 6 CPU clock periods, the count rate is

1/6 of the CPU clock frequency or 1/12 of the os-

following the one in which the transition was de-

tected. Since it takes 2 machine cycles (24 f

OSC

clock periods) to recognize a 1-to-0 transition, the

maximum count rate is 1/24 of the f . There are

OSC

no restrictions on the duty cycle of the external in-

put signal, but to ensure that a given level is sam-

pled at least once before it changes, it should be

held for at least one full cycle. In addition to the

“Timer” or “Counter” selection, Timer 0 and Timer

1 have four operating modes from which to select.

cillator frequency (f

).

OSC

Timer 0 and Timer 1

In the “Counter” function, the register is increment-

ed in response to a 1-to-0 transition at its corre-

sponding external input pin, T0 or T1. In this

function, the external input is sampled during

S5P2 of every machine cycle. When the samples

show a high in one cycle and a low in the next cy-

cle, the count is incremented. The new count value

appears in the register during S3P1 of the cycle

The “Timer” or “Counter” function is selected by

control bits C/ T in the Special Function Register

TMOD. These Timer/Counters have four operat-

ing modes, which are selected by bit-pairs (M1,

M0) in TMOD. Modes 0, 1, and 2 are the same for

Timers/ Counters. Mode 3 is different. The four op-

erating modes are de-scribed in the following text.

Table 36. Control Register (TCON)

7

6

5

4

3

2

1

0

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

Table 37. Description of the TCON Bits

Bit

Symbol

Function

Timer 1 Overflow Flag. Set by hardware on Timer/Counter overflow. Cleared by

hardware when processor vectors to interrupt routine

7

TF1

6

TR1

TF0

Timer 1 Run Control Bit. Set/cleared by software to turn Timer/Counter on or off

Timer 0 Overflow Flag. Set by hardier on Timer/Counter overflow. Cleared by hardware

when processor vectors to interrupt routine

5

4

TR0

IE1

Timer 0 Run Control Bit. Set/cleared by software to turn Timer/Counter on or off

Interrupt 1 Edge Flag. Set by hardware when external interrupt edge detected. Cleared

when interrupt processed

3

Interrupt 1 Type Control Bit. Set/cleared by software to specify falling-edge/low-level

triggered external interrupt

2

1

0

IT1

IE0

IT0

Interrupt 0 Edge Flag. Set by hardware when external interrupt edge detected. Cleared

when interrupt processed

Interrupt 0 Type Control Bit. Set/cleared by software to specify falling-edge/low-level

triggered external interrupt

49/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Mode 0. Putting either Timer into Mode 0 makes

it look like an 8048 Timer, which is an 8-bit Counter

with a divide-by-32 prescaler. Figure 22., page 51

shows the Mode 0 operation as it applies to

Timer1.

In this mode, the Timer register is configured as a

13-bit register. As the count rolls over from all '1s'

to all '0s,' it sets the Timer Interrupt Flag TF1. The

counted input is enabled to the Timer when TR1 =

1 and either GATE = 0 or /INT1 = 1. (Setting GATE

= 1 allows the Timer to be controlled by external in-

put /INT1, to facilitate pulse width measurements).

TR1 is a control bit in the Special Function Regis-

ter TCON (TCON Control Register). GATE is in

TMOD.

The 13-bit register consists of all 8 bits of TH1 and

the lower 5 bits of TL1. The upper 3 bits of TL1 are

indeterminate and should be ignored. Setting the

run flag does not clear the registers.

Mode 0 operation is the same for the Timer0 as for

Timer1. Substitute TR0, TF0, and /INT0 for the

corresponding Timer1 signals in Figure

22., page 51. There are two different GATE Bits,

one for Timer1 and one for Timer0.

Mode 1. Mode 1 is the same as Mode 0, except

that the Timer register is being run with all 16 bits.

Table 38. TMOD Register (TMOD)

7

6

5

4

3

2

1

0

Gate

C/T

M1

M0

Gate

C/T

M1

M0

Table 39. Description of the TMOD Bits

Bit

Symbol

Timer

Function

Gating control when set. Timer/Counter 1 is enabled only while INT1 pin is High and

TR1 control pin is set. When cleared, Timer 1 is enabled whenever TR1 control bit is set

7

Gate

Timer or Counter selector, cleared for timer operation (input from internal system clock);

set for counter operation (input from T1 input pin)

6

5

C/T

M1

Timer 1

(M1,M0)=(0,0): 13-bit Timer/Counter, TH1, with TL1 as 5-bit prescaler

(M1,M0)=(0,1): 16-bit Timer/Counter. TH1 and TL1 are cascaded. There is no prescaler.

(M1,M0)=(1,0): 8-bit auto-reload Timer/Counter. TH1 holds a value which is to be

reloaded into TL1 each time it overflows

4

3

M0

(M1,M0)=(1,1): Timer/Counter 1 stopped

Gating control when set. Timer/Counter 0 is enabled only while INT0 pin is High and

TR0 control pin is set. When cleared, Timer 0 is enabled whenever TR0 control bit is set

Gate

Timer or Counter selector, cleared for timer operation (input from internal system clock);

set for counter operation (input from T0 input pin)

2

1

C/T

M1

Timer 0

(M1,M0)=(0,0): 13-bit Timer/Counter, TH0, with TL0 as 5-bit prescaler

(M1,M0)=(0,1): 16-bit Timer/Counter. TH0 and TL0 are cascaded. There is no prescaler.

(M1,M0)=(1,0): 8-bit auto-reload Timer/Counter. TH0 holds a value which is to be

reloaded into TL0 each time it overflows

0

M0

(M1,M0)=(1,1): TL0 is an 8-bit Timer/Counter controlled by the standard TImer 0 control

bits. TH0 is an 8-bit timer only controlled by Timer 1 control bits

50/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 22. Timer/Counter Mode 0: 13-bit Counter

f_OSC

÷ 12

C/T = 0

C/T = 1

TH1

(8 bits)

TL1

(5 bits)

TF1

Interrupt

T1 pin

Control

TR1

Gate

INT1 pin

AI06622

Figure 23. Timer/Counter Mode 2: 8-bit Auto-reload

f_OSC

÷ 12

C/T = 0

C/T = 1

TL1

(8 bits)

TF1

Interrupt

T1 pin

Control

TR1

Gate

INT1 pin

TH1

(8 bits)

AI06623

51/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 24. Timer/Counter Mode 3: Two 8-bit Counters

f_OSC

÷ 12

C/T = 0

C/T = 1

TL0

(8 bits)

TF0

Interrupt

T0 pin

Control

TR0

Gate

INT0 pin

TH1

(8 bits)

f_OSC

TF1

Interrupt

÷ 12

Control

TR1

AI06624

52/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Mode 2. Mode 2 configures the Timer register as

lected by bits in the T2CON as shown in Table

41., page 54. In the Capture Mode there are two

options which are selected by Bit EXEN2 in

T2CON. if EXEN2 = 0, then Timer 2 is a 16-bit tim-

er or counter which upon overflowing sets Bit TF2,

the Timer 2 Overflow Bit, which can be used to

generate an interrupt. If EXEN2 = 1, then Timer 2

still does the above, but with the added feature

that a 1-to-0 transition at external input T2EX

causes the current value in the Timer 2 registers,

TL2 and TH2, to be captured into registers

RCAP2L and RCAP2H, respectively. In addition,

the transition at T2EX causes Bit EXF2 in T2CON

to be set, and EXF2 like TF2 can generate an in-

terrupt. The Capture Mode is illustrated in Figure

25., page 55.

In the Auto-reload Mode, there are again two op-

tions, which are selected by bit EXEN2 in T2CON.

If EXEN2 = 0, then when Timer 2 rolls over it not

only sets TF2 but also causes the Timer 2 regis-

ters to be reloaded with the 16-bit value in regis-

ters RCAP2L and RCAP2H, which are preset by

software. If EXEN2 = 1, then Timer 2 still does the

above, but with the added feature that a 1-to-0

transition at external input T2EX will also trigger

the 16-bit reload and set EXF2. The Auto-reload

Mode is illustrated in Standard Serial Interface

(UART) Figure 26., page 55. The Baud Rate Gen-

eration Mode is selected by (RCLK, RCLK1)=1

and/or (TCLK, TCLK1)=1. It will be described in

conjunction with the serial port.

an 8-bit Counter (TL1) with automatic reload, as

shown in Figure 23., page 51. Overflow from TL1

not only sets TF1, but also reloads TL1 with the

contents of TH1, which is preset by software. The

reload leaves TH1 unchanged. Mode 2 operation

is the same for Timer/Counter 0.

Mode 3. Timer 1 in Mode 3 simply holds its count.

The effect is the same as setting TR1 = 0.

Timer 0 in Mode 3 establishes TL0 and TH0 as two

separate counters. The logic for Mode 3 on Timer

0 is shown in Figure 24., page 52. TL0 uses the

Timer 0 control Bits: C/T, GATE, TR0, INT0, and

TF0. TH0 is locked into a timer function (counting

machine cycles) and takes over the use of TR1

and TF1 from Timer 1. Thus, TH0 now controls the

“Timer 1“ Interrupt.

Mode 3 is provided for applications requiring an

extra 8-bit timer on the counter. With Timer 0 in

Mode 3, an uPSD323X Devices can look like it has

three Timer/Counters. When Timer 0 is in Mode 3,

Timer 1 can be turned on and off by switching it out

of and into its own Mode 3, or can still be used by

the serial port as a baud rate generator, or in fact,

in any application not requiring an interrupt.

Timer 2

Like Timers 0 and 1, Timer 2 can operate as either

an event timer or as an event counter. This is se-

lected by Bit C/T2 in the special function register

T2CON. It has three operating modes: capture,

autoload, and baud rate generator, which are se-

Table 40. Timer/Counter 2 Control Register (T2CON)

7

6

5

4

3

2

1

0

TF2

EXF2

RCLK

TCLK

EXEN2

TR2

C/T2

CP/RL2

53/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 41. Description of the T2CON Bits

Bit

Symbol

Function

Timer 2 overflow flag. Set by a Timer 2 overflow, and must be cleared by software. TF2

will not be set when either (RCLK, RCLK1)=1 or (TCLK, TCLK)=1

7

TF2

Timer 2 external flag set when either a capture or reload is caused by a negative

transition on T2EX and EXEN2=1. When Timer 2 Interrupt is enabled, EXF2=1 will

cause the CPU to vector to the Timer 2 Interrupt routine. EXF2 must be cleared by

software

6

EXF2

Receive clock flag (UART 1). When set, causes the serial port to use Timer 2 overflow

pulses for its receive clock in Modes 1 and 3. TCLK=0 causes Timer 1 overflow to be

used for the receive clock

(1)

5

4

3

RCLK

Transmit clock flag (UART 1). When set, causes the serial port to use Timer 2 overflow

pulses for its transmit clock in Modes 1 and 3. TCLK=0 causes Timer 1 overflow to be

used for the transmit clock

(1)

TCLK

Timer 2 external enable flag. When set, allows a capture or reload to occur as a result of

a negative transition on T2EX if Timer 2 is not being used to clock the serial port.

EXEN2=0 causes Time 2 to ignore events at T2EX

EXEN2

2

1

TR2

Start/stop control for Timer 2. A logic 1 starts the timer

Timer or Counter select for Timer 2. Cleared for timer operation (input from internal

C/T2

system clock, t

); set for external event counter operation (negative edge triggered)

CPU

Capture/reload flag. When set, capture will occur on negative transition of T2EX if

EXEN2=1. When cleared, auto-reload will occur either with TImer 2 overflows, or

negative transitions of T2EX when EXEN2=1. When either (RCLK, RCLK1)=1 or (TCLK,

TCLK)=1, this bit is ignored, and timer is forced to auto-reload on Timer 2 overflow

0

CP/RL2

Note: 1. The RCLK1 and TCLK1 Bits in the PCON Register control UART 2, and have the same function as RCLK and TCLK.

Table 42. Timer/Counter2 Operating Modes

T2CON

Input Clock

T2MOD T2CON P1.1

RxCLK

or

TxCLK

Mode

Remarks

CP/

RL2

External

(P1.0/T2)

DECN

EXEN T2EX

TR2

Internal

0

1

0

1

0

1

x

↓

0

1

reload upon overflow

reload trigger (falling edge)

Down counting

16-bit

Auto-

reload

MAX

f

/12

OSC

f

/24

OSC

Up counting

16-bit Timer/Counter

(only up counting)

0

1

x

1

x

0

1

0

x

↓

x

MAX

16-bit

Capture

f

/12

OSC

f

/24

OSC

Capture (TH1,TL2) →

(RCAP2H,RCAP2L)

No overflow interrupt

request (TF2)

MAX

Baud Rate

Generator

/24

OSC

Extra External Interrupt

(Timer 2)

1

x

1

0

x

1

x

↓

Off

x

Timer 2 stops

—

Note: ↓ = falling edge

54/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 25. Timer 2 in Capture Mode

f_OSC

÷ 12

C/T2 = 0

C/T2 = 1

TH2

(8 bits)

TL2

(8 bits)

TF2

T2 pin

Control

TR2

Timer 2

Interrupt

Capture

RCAP2H

RCAP2L

Transition

Detector

T2EX pin

EXP2

Control

EXEN2

AI06625

Figure 26. Timer 2 in Auto-Reload Mode

f_OSC

÷ 12

C/T2 = 0

C/T2 = 1

TH2

(8 bits)

TL2

(8 bits)

TF2

T2 pin

Control

TR2

Timer 2

Interrupt

Reload

RCAP2H

RCAP2L

Transition

Detector

T2EX pin

EXP2

Control

EXEN2

AI06626

55/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

STANDARD SERIAL INTERFACE (UART)

The uPSD323X Devices provides two standard

8032 UART serial ports. The first port is connected

to pin P3.0 (RX) and P3.1 (TX). The second port is

connected to pin P1.2 (RX) and P1.3(TX). The op-

eration of the two serial ports are the same and are

controlled by the SCON and SCON2 registers.

2 in all respects except baud rate. The baud rate

in Mode 3 is variable.

In all four modes, transmission is initiated by any

instruction that uses SBUF as a destination regis-

ter. Reception is initiated in Mode 0 by the condi-

tion RI = 0 and REN = 1. Reception is initiated in

the other modes by the incoming start bit if REN =

1.

The serial port is full duplex, meaning it can trans-

mit and receive simultaneously. It is also receive-

buffered, meaning it can commence reception of a

second byte before a previously received byte has

been read from the register. (However, if the first

byte still has not been read by the time reception

of the second byte is complete, one of the bytes

will be lost.) The serial port receive and transmit

registers are both accessed at Special Function

Register SBUF (or SBUF2 for the second serial

port). Writing to SBUF loads the transmit register,

and reading SBUF accesses a physically separate

receive register.

Multiprocessor Communications

Modes 2 and 3 have a special provision for multi-

processor communications. In these modes, 9

data bits are received. The 9th one goes into RB8.

Then comes a Stop Bit. The port can be pro-

grammed such that when the Stop Bit is received,

the serial port interrupt will be activated only if RB8

= 1. This feature is enabled by setting Bit SM2 in

SCON. A way to use this feature in multi-proces-

sor systems is as follows:

When the master processor wants to transmit a

block of data to one of several slaves, it first sends

out an address byte which identifies the target

slave. An address byte differs from a data byte in

that the 9th bit is '1' in an address byte and 0 in a

data byte. With SM2 = 1, no slave will be interrupt-

ed by a data byte. An ad-dress byte, however, will

interrupt all slaves, so that each slave can exam-

ine the received byte and see if it is being ad-

dressed. The addressed slave will clear its SM2

Bit and prepare to receive the data bytes that will

be coming. The slaves that weren’t being ad-

dressed leave their SM2s set and go on about

their business, ignoring the coming data bytes.

The serial port can operate in 4 modes:

Mode 0. Serial data enters and exits through

RxD. TxD outputs the shift clock. 8 bits are trans-

mitted/received (LSB first). The baud rate is fixed

at 1/12 the f

.

OSC

Mode 1. 10 bits are transmitted (through TxD) or

received (through RxD): a start Bit (0), 8 data bits

(LSB first), and a Stop Bit (1). On receive, the Stop

Bit goes into RB8 in Special Function Register

SCON. The baud rate is variable.

Mode 2. 11 bits are transmitted (through TxD) or

received (through RxD): start Bit (0), 8 data bits

(LSB first), a programmable 9th data bit, and a

Stop Bit (1). On Transmit, the 9th data bit (TB8 in

SCON) can be assigned the value of '0' or '1.' Or,

for example, the Parity Bit (P, in the PSW) could

be moved into TB8. On receive, the 9th data bit

goes into RB8 in Special Function Register SCON,

while the Stop Bit is ignored. The baud rate is pro-

grammable to either 1/32 or 1/64 the oscillator fre-

quency.

SM2 has no effect in Mode 0, and in Mode 1 can

be used to check the validity of the Stop Bit. In a

Mode 1 reception, if SM2 = 1, the receive interrupt

will not be activated unless a valid Stop Bit is re-

ceived.

Serial Port Control Register

The serial port control and status register is the

Special Function Register SCON (SCON2 for the

second port), shown in Figure 27., page 61. This

register contains not only the mode selection bits,

but also the 9th data bit for transmit and receive

(TB8 and RB8), and the Serial Port Interrupt Bits

(TI and RI).

Mode 3. 11 bits are transmitted (through TxD) or

received (through RxD): a start Bit (0), 8 data bits

(LSB first), a programmable 9th data bit, and a

Stop Bit (1). In fact, Mode 3 is the same as Mode

Table 43. Serial Port Control Register (SCON)

7

6

5

4

3

2

1

0

SM0

SM1

SM2

REN

TB8

RB8

TI

RI

56/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 44. Description of the SCON Bits

Bit

Symbol

Function

7

SM0

(SM1,SM0)=(0,0): Shift Register. Baud rate = f

/12

OSC

(SM1,SM0)=(1,0): 8-bit UART. Baud rate = variable

(SM1,SM0)=(0,1): 8-bit UART. Baud rate = f /64 or f

(SM1,SM0)=(1,1): 8-bit UART. Baud rate = variable

/32

OSC

6

SM1

Enables the multiprocessor communication features in Mode 2 and 3. In Mode 2 or 3, if

SM2 is set to '1,' RI will not be activated if its received 8th data bit (RB8) is '0.' In Mode 1,

if SM2=1, RI will not be activated if a valid Stop Bit was not received. In Mode 0, SM2

should be '0'

5

SM2

Enables serial reception. Set by software to enable reception. Clear by software to

disable reception

4

3

2

REN

TB8

RB8

The 8th data bit that will be transmitted in Modes 2 and 3. Set or clear by software as

desired

In Modes 2 and 3, this bit contains the 8th data bit that was received. In Mode 1, if

SM2=0, RB8 is the Snap Bit that was received. In Mode 0, RB8 is not used

Transmit Interrupt Flag. Set by hardware at the end of the 8th bit time in Mode 0, or at

the beginning of the Stop Bit in the other modes, in any serial transmission. Must be

cleared by software

1

0

TI

Receive Interrupt Flag. Set by hardware at the end of the 8th bit time in Mode 0, or

halfway through the Stop Bit in the other modes, in any serial reception (except for

SM2). Must be cleared by software

RI

Baud Rates. The baud rate in Mode 0 is fixed:

Mode 0 Baud Rate = f / 12

One can achieve very low baud rates with Timer 1

by leaving the Timer 1 Interrupt enabled, and con-

figuring the Timer to run as a 16-bit timer (high nib-

ble of TMOD = 0001B), and using the Timer 1

Interrupt to do a 16-bit software reload. Figure

22., page 51 lists various commonly used baud

rates and how they can be obtained from Timer 1.

Using Timer/Counter 2 to Generate Baud

Rates. In the uPSD323X Devices, Timer 2 select-

ed as the baud rate generator by setting TCLK

and/or RCLK (see Figure 22., page 51 Timer/

Counter 2 Control Register (T2CON)).

OSC

The baud rate in Mode 2 depends on the value of

Bit SMOD = 0 (which is the value on reset), the

baud rate is 1/64 the oscillator frequency. If SMOD

= 1, the baud rate is 1/32 the oscillator frequency.

SMOD

Mode 2 Baud Rate = (2

/ 64) x f

OSC

In the uPSD323X Devices, the baud rates in

Modes 1 and 3 are determined by the Timer 1

overflow rate.

Using Timer 1 to Generate Baud Rates. When

Timer 1 is used as the baud rate generator, the

baud rates in Modes 1 and 3 are determined by

the Timer 1 overflow rate and the value of SMOD

as follows (see:

Note: The baud rate for transmit and receive can

be simultaneously different. Setting RCLK and/or

TCLK puts Timer into its Baud Rate Generator

Mode.

Mode 1,3 Baud Rate =

The RCLK and TCLK Bits in the T2CON register

configure UART 1. The RCLK1 and TCLK1 Bits in

the PCON register configure UART 2.

The Baud Rate Generator Mode is similar to the

Auto-reload Mode, in that a roll over in TH2 causes

the Timer 2 registers to be reloaded with the 16-bit

value in registers RCAP2H and RCAP2L, which

are preset by software.

SMOD

(2

/ 32) x (Timer 1 overflow rate)

The Timer 1 Interrupt should be disabled in this

application. The Timer itself can be configured for

either “timer” or “counter” operation, and in any of

its 3 running modes. In the most typical applica-

tions, it is configured for “timer” operation, in the

Auto-reload Mode (high nibble of TMOD = 0010B).

In that case the baud rate is given by the formula:

Now, the baud rates in Modes 1 and 3 are deter-

mined at Timer 2’s overflow rate as follows:

Mode 1,3 Baud Rate = Timer 2 Overflow Rate / 16

Mode 1,3 Baud Rate =

SMOD

(2

/ 32) x (f

/ (12 x [256 – (TH1)]))

OSC

57/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 45. Timer 1-Generated Commonly Used Baud Rates

f

Baud Rate

SMOD

Timer 1

OSC

C/T

X

0

Mode

Reload Value

Mode 0 Max: 1MHz

12MHz

X

1

0

X

2

1

X

Mode 2 Max: 375K

Modes 1, 3: 62.5K

12MHz

FFh

FDh

FAh

F4h

E8h

1Dh

72h

FEEBh

19.2K

9.6K

4.8K

2.4K

1.2K

137.5

110

11.059MHz

6MHz

0

110

12MHz

0

The timer can be configured for either “timer” or

“counter” operation. In the most typical applica-

tions, it is configured for “timer” operation (C/T2 =

0). “Timer” operation is a little different for Timer 2

when it’s being used as a baud rate generator.

Normally, as a timer it would increment every ma-

chine cycle (thus at the 1/6 the CPU clock frequen-

cy). In the case, the baud rate is given by the

formula:

timer is being incremented every state time, and

the results of a READ or WRITE may not be accu-

rate. The RC registers may be read, but should not

be written to, because a WRITE might overlap a

reload and cause WRITE and/or reload errors.

Turn the timer off (clear TR2) before accessing the

Timer 2 or RC registers, in this case.

More About Mode 0. Serial data enters and exits

through RxD. TxD outputs the shift clock. 8 bits are

transmitted/received: 8 data bits (LSB first). The

Mode 1,3 Baud Rate =

baud rate is fixed at 1/12 the f

.

OSC

f

/ (32 x [65536 – (RCAP2H, RCAP2L)]

OSC

Figure 27., page 61 shows a simplified functional

diagram of the serial port in Mode 0, and associat-

ed timing.

where (RCAP2H, RCAP2L) is the content of

RC2H and RC2L taken as a 16-bit unsigned inte-

ger.

Transmission is initiated by any instruction that

uses SBUF as a destination register. The “WRITE

to SBUF” signal at S6P2 also loads a '1' into the

9th position of the transmit shift register and tells

the TX Control block to commence a transmission.

The internal timing is such that one full machine

cycle will elapse between “WRITE to SBUF” and

activation of SEND.

Timer 2 also be used as the Baud Rate Generating

Mode. This mode is valid only if RCLK + TCLK = 1

in T2CON or in PCON.

Note: A roll-over in TH2 does not set TF2, and will

not generate an interrupt. Therefore, the Timer In-

terrupt does not have to be disabled when Timer 2

is in the Baud Rate Generator Mode.

Note: If EXEN2 is set, a 1-to-0 transition in T2EX

will set EXF2 but will not cause a reload from

(RCAP2H, RCAP2L) to (TH2, TL2). Thus when

Timer 2 is in use as a baud rate generator, T2EX

can be used as an extra external interrupt, if de-

sired.

It should be noted that when Timer 2 is running

(TR2 = 1) in “timer” function in the Baud Rate Gen-

erator Mode, one should not try to READ or

WRITE TH2 or TL2. Under these conditions the

SEND enables the output of the shift register to the

alternate out-put function line of RxD and also en-

able SHIFT CLOCK to the alternate output func-

tion line of TxD. SHIFT CLOCK is low during S3,

S4, and S5 of every machine cycle, and high dur-

ing S6, S1, and S2. At S6P2 of every machine cy-

cle in which SEND is active, the contents of the

transmit shift are shifted to the right one position.

58/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

As data bits shift out to the right, zeros come in

DATA is activated, which enables the output bit of

the transmit shift register to TxD. The first shift

pulse occurs one bit time after that.

from the left. When the MSB of the data byte is at

the output position of the shift register, then the '1'

that was initially loaded into the 9th position, is just

to the left of the MSB, and all positions to the left

of that contain zeros. This condition flags the TX

Control block to do one last shift and then deacti-

vate SEND and set T1. Both of these actions occur

at S1P1. Both of these actions occur at S1P1 of

the 10th machine cycle after “WRITE to SBUF.”

Reception is initiated by the condition REN = 1 and

R1 = 0. At S6P2 of the next machine cycle, the RX

Control unit writes the bits 11111110 to the receive

shift register, and in the next clock phase activates

RECEIVE.

RECEIVE enables SHIFT CLOCK to the alternate

output function line of TxD. SHIFT CLOCK makes

transitions at S3P1 and S6P1 of every machine

cycle in which RECEIVE is active, the contents of

the receive shift register are shifted to the left one

position. The value that comes in from the right is

the value that was sampled at the RxD pin at S5P2

of the same machine cycle.

As data bits come in from the right, '1s' shift out to

the left. When the '0' that was initially loaded into

the right-most position arrives at the left-most po-

sition in the shift register, it flags the RX Control

block to do one last shift and load SBUF. At S1P1

of the 10th machine cycle after the WRITE to

SCON that cleared RI, RECEIVE is cleared as RI

is set.

As data bits shift out to the right, zeros are clocked

in from the left. When the MSB of the data byte is

at the output position of the shift register, then the

'1' that was initially loaded into the 9th position is

just to the left of the MSB, and all positions to the

left of that contain zeros. This condition flags the

TX Control unit to do one last shift and then deac-

tivate SEND and set TI. This occurs at the 10th di-

vide-by-16 rollover after “WRITE to SBUF.”

Reception is initiated by a detected 1-to-0 transi-

tion at RxD. For this purpose RxD is sampled at a

rate of 16 times whatever baud rate has been es-

tablished. When a transition is detected, the di-

vide-by-16 counter is immediately reset, and 1FFH

is written into the input shift register. Resetting the

divide-by-16 counter aligns its roll-overs with the

boundaries of the incoming bit times.

The 16 states of the counter divide each bit time

into 16ths. At the 7th, 8th, and 9th counter states

of each bit time, the bit detector samples the value

of RxD. The value accepted is the value that was

seen in at least 2 of the 3 samples. This is done for

noise rejection. If the value accepted during the

first bit time is not '0,' the receive circuits are reset

and the unit goes back to looking for an-other 1-to-

0 transition. This is to provide rejection of false

start bits. If the start bit proves valid, it is shifted

into the input shift register, and reception of the re-

set of the rest of the frame will proceed.

As data bits come in from the right, '1s' shift out to

the left. When the start bit arrives at the left-most

position in the shift register (which in Mode 1 is a

9-bit register), it flags the RX Control block to do

one last shift, load SBUF and RB8, and set RI. The

signal to load SBUF and RB8, and to set RI, will be

generated if, and only if, the following conditions

are met at the time the final shift pulse is generat-

ed:

More About Mode 1. Ten bits are transmitted

(through TxD), or received (through RxD): a start

Bit (0), 8 data bits (LSB first). and a Stop Bit (1). On

receive, the Stop Bit goes into RB8 in SCON. In

the uPSD323X Devices the baud rate is deter-

mined by the Timer 1 or Timer 2 over-flow rate.

Figure 29., page 62 shows a simplified functional

diagram of the serial port in Mode 1, and associat-

ed timings for transmit receive.

Transmission is initiated by any instruction that

uses SBUF as a destination register. The “WRITE

to SBUF” signal also loads a '1' into the 9th bit po-

sition of the transmit shift register and flags the TX

Control unit that a transmission is requested.

Transmission actually commences at S1P1 of the

machine cycle following the next rollover in the di-

vide-by-16 counter. (Thus, the bit times are syn-

chronized to the divide-by-16 counter, not to the

“WRITE to SBUF” signal.)

1. R1 = 0, and

2. Either SM2 = 0, or the received Stop Bit = 1.

If either of these two conditions is not met, the re-

ceived frame is irretrievably lost. If both conditions

are met, the Stop Bit goes into RB8, the 8 data bits

go into SBUF, and RI is activated. At this time,

whether the above conditions are met or not, the

unit goes back to looking for a 1-to-0 transition in

RxD.

The transmission begins with activation of SEND

which puts the start bit at TxD. One bit time later,

59/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

More About Modes 2 and 3. Eleven bits are

transmitted (through TxD), or received (through

RxD): a Start Bit (0), 8 data bits (LSB first), a pro-

grammable 9th data bit, and a Stop Bit (1). On

transmit, the 9th data bit (TB8) can be assigned

the value of '0' or '1.' On receive, the data bit goes

into RB8 in SCON. The baud rate is programma-

ble to either 1/16 or 1/32 the CPU clock frequency

in Mode 2. Mode 3 may have a variable baud rate

generated from Timer 1.

Figure 31., page 63 and Figure 33., page 64 show

a functional diagram of the serial port in Modes 2

and 3. The receive portion is exactly the same as

in Mode 1. The transmit portion differs from Mode

1 only in the 9th bit of the transmit shift register.

Transmission is initiated by any instruction that

uses SBUF as a destination register. The “WRITE

to SBUF” signal also loads TB8 into the 9th bit po-

sition of the transmit shift register and flags the TX

Control unit that a transmission is requested.

Transmission commences at S1P1 of the machine

cycle following the next roll-over in the divide-by-

16 counter. (Thus, the bit times are synchronized

to the divide-by-16 counter, not to the “WRITE to

SBUF” signal.)

The transmission begins with activation of SEND,

which puts the start bit at TxD. One bit time later,

DATA is activated, which enables the output bit of

the transmit shift register to TxD. The first shift

pulse occurs one bit time after that. The first shift

clocks a '1' (the Stop Bit) into the 9th bit position of

the shift register. There-after, only zeros are

clocked in. Thus, as data bits shift out to the right,

zeros are clocked in from the left. When TB8 is at

the out-put position of the shift register, then the

Stop Bit is just to the left of TB8, and all positions

to the left of that contain zeros. This condition flags

the TX Control unit to do one last shift and then de-

activate SEND and set TI. This occurs at the 11th

divide-by 16 rollover after “WRITE to SUBF.”

Reception is initiated by a detected 1-to-0 transi-

tion at RxD. For this purpose RxD is sampled at a

rate of 16 times whatever baud rate has been es-

tablished. When a transition is detected, the di-

vide-by-16 counter is immediately reset, and 1FFH

is written to the input shift register.

At the 7th, 8th, and 9th counter states of each bit

time, the bit detector samples the value of R-D.

The value accepted is the value that was seen in

at least 2 of the 3 samples. If the value accepted

during the first bit time is not '0,' the receive circuits

are reset and the unit goes back to looking for an-

other 1-to-0 transition. If the Start Bit proves valid,

it is shifted into the input shift register, and recep-

tion of the rest of the frame will proceed.

As data bits come in from the right, '1s' shift out to

the left. When the Start Bit arrives at the left-most

position in the shift register (which in Modes 2 and

3 is a 9-bit register), it flags the RX Control block

to do one last shift, load SBUF and RB8, and set

RI.

The signal to load SBUF and RB8, and to set RI,

will be generated if, and only if, the following con-

ditions are met at the time the final shift pulse is

generated:

1. RI = 0, and

2. Either SM2 = 0, or the received 9th data bit = 1

If either of these conditions is not met, the received

frame is irretrievably lost, and RI is not set. If both

conditions are met, the received 9th data bit goes

into RB8, and the first 8 data bits go into SBUF.

One bit time later, whether the above conditions

were met or not, the unit goes back to looking for

a 1-to-0 transition at the RxD input.

60/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 27. Serial Port Mode 0, Block Diagram

Internal Bus

Write

to

SBUF

RxD

D

S

P3.0 Alt

Output

Function

Q

SBUF

CL

Zero Detector

Shift

Start

Tx Control

T

Send

S6

Tx Clock

Serial

Port

Interrupt

Shift

Clock

TxD

Receive

Shift

6 5 4 3 2 1 0

R

P3.1 Alt

Output

Function

Rx Clock

Start

REN

R1

Rx Control

7

RxD

P3.0 Alt

Input

Function

Input Shift Register

Load

SBUF

Shift

SBUF

Read

SBUF

Internal Bus

AI06824

Figure 28. Serial Port Mode 0, Waveforms

Write to SBUF

S6P2

Send

Shift

Transmit

Receive

D0

S3P1

D1

S6P1

D2

D3

D4

D5

D6

D7

RxD (Data Out)

TxD (Shift Clock)

T

Write to SCON

Clear RI

RI

Receive

Shift

RxD (Data In)

TxD (Shift Clock)

D0

D1

D2

D3

D4

D5

D6

D7

AI06825

61/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 29. Serial Port Mode 1, Block Diagram

Timer1

Overflow

Timer2

Overflow

Internal Bus

TB8

Write

to

SBUF

D

S

TxD

Q

SBUF

÷2

CL

0

1

Zero Detector

SMOD

0

1

Shift

Data

Start

TCLK

Tx Control

TI

Send

÷16

Tx Clock

Serial

1

Port

Interrupt

RCLK

÷16

Sample

1-to-0

Transition

Detector

Load SBUF

Shift

RI

Rx Clock

Start

Rx Control

1FFh

Rx Detector

Input Shift Register

Load

SBUF

RxD

Shift

SBUF

Read

SBUF

Internal Bus

AI06826

Figure 30. Serial Port Mode 1, Waveforms

Tx Clock

Write to SBUF

S1P1

Send

Transmit

Data

Shift

Start Bit

D0

D1

D2

D3

D4

D5

D6

D7

TxD

T1

Stop Bit

÷16 Reset

Rx Clock

Start Bit

D0

D3

RxD

Receive

Bit Detector

Sample Times

Shift

RI

AI06843

62/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 31. Serial Port Mode 2, Block Diagram

Phase2 Clock

Internal Bus

1/2*f

OSC

TB8

S

Write

to

SBUF

D

TxD

Q

SBUF

÷2

CL

0

1

Zero Detector

SMOD

Shift

Data

Start

Tx Control

TI

Send

÷16

Tx Clock

Serial

Port

Interrupt

÷16

Sample

1-to-0

Transition

Detector

Load SBUF

Shift

RI

Rx Clock

Start

Rx Control

1FFh

Rx Detector

Input Shift Register

Load

SBUF

RxD

Shift

SBUF

Read

SBUF

Internal Bus

AI06844

Figure 32. Serial Port Mode 2, Waveforms

Tx Clock

Write to SBUF

S1P1

Send

Data

Transmit

Shift

Start Bit

D0

D1

D2

D3

D4

D5

D6

D7

TB8

TxD

TI

Stop Bit

Generator

÷16 Reset

Rx Clock

Start Bit

D0

D1

D2

D3

D4

D5

D6

D7

RB8

RxD

Stop Bit

Receive

Bit Detector

Sample Times

Shift

RI

AI06845

63/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 33. Serial Port Mode 3, Block Diagram

Timer1

Overflow

Timer2

Overflow

Internal Bus

TB8

Write

to

SBUF

D

S

TxD

Q

SBUF

÷2

CL

0

1

Zero Detector

SMOD

0

1

Shift

Data

Start

TCLK

Tx Control

TI

Send

÷16

Tx Clock

Serial

1

Port

Interrupt

RCLK

÷16

Sample

1-to-0

Transition

Detector

Load SBUF

Shift

RI

Rx Clock

Start

Rx Control

1FFh

Rx Detector

Input Shift Register

Load

SBUF

RxD

Shift

SBUF

Read

SBUF

Internal Bus

AI06846

Figure 34. Serial Port Mode 3, Waveforms

Tx Clock

Write to SBUF

S1P1

Send

Data

Transmit

Shift

Start Bit

D0

D1

D2

D3

D4

D5

D6

D7

TB8

TxD

TI

Stop Bit

Generator

÷16 Reset

Rx Clock

Start Bit

D0

D1

D2

D3

D4

D5

D6

D7

RB8

RxD

Stop Bit

Receive

Bit Detector

Sample Times

Shift

RI

AI06847

64/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

ANALOG-TO-DIGITAL CONVERTOR (ADC)

The analog to digital (A/D) converter allows con-

version of an analog input to a corresponding 8-bit

digital value. The A/D module has four analog in-

puts, which are multiplexed into one sample and

hold. The output of the sample and hold is the in-

put into the converter, which generates the result

via successive approximation. The analog supply

The block diagram of the A/D module is shown in

Figure 35. The A/D Status Bit ADSF is set auto-

matically when A/D conversion is completed,

cleared when A/D conversion is in process.

The ASCL should be loaded with a value that re-

sults in a clock rate of approximately 6MHz for the

ADC using the following formula:

voltage is connected to AV

of A/D module.

of ladder resistance

REF

ADC clock input = (f

value +1)

/ 2) / (Prescaler register

OSC

The A/D module has two registers which are the

control register ACON and A/D result register

ADAT. The register ACON, shown in Table

47., page 66, controls the operation of the A/D

converter module. To use analog inputs, I/O is se-

lected by P1SFS register. Also an 8-bit prescaler

ASCL divides the main system clock input down to

approximately 6MHz clock that is required for the

ADC logic. Appropriate values need to be loaded

into the prescaler based upon the main MCU clock

frequency prior to use.

The processing of conversion starts when the

Start Bit ADST is set to '1.' After one cycle, it is

cleared by hardware. The register ADAT contains

the results of the A/D conversion. When conver-

sion is completed, the result is loaded into the

ADAT the A/D Conversion Status Bit ADSF is set

to '1.'

Where f

is the MCU clock input frequency

OSC

The conversion time for the ADC can be calculat-

ed as follows:

ADC Conversion Time = 8 clock * 8bits * (ADC

Clock) ~= 10.67usec (at 6MHz)

ADC Interrupt

The ADSF Bit in the ACON register is set to '1'

when the A/D conversion is complete. The status

bit can be driven by the MCU, or it can be config-

ured to generate a falling edge interrupt when the

conversion is complete.

The ADSF Interrupt is enabled by setting the ADS-

FINT Bit in the PCON register. Once the bit is set,

the external INT1 Interrupt is disabled and the

ADSF Interrupt takes over as INT1. INT1 must be

configured as if it is an edge interrupt input. The

INP1 pin (p3.3) is available for general I/O func-

tions, or Timer1 gate control.

Figure 35. A/D Block Diagram

Ladder

Resistor

AVREF

Decode

Conversion

Complete

Interrupt

Input

MUX

ACH0

ACH1

Successive

Approximation

Circuit

S/H

ACH2

ACH3

ACON

ADAT

INTERNAL BUS

AI06627

65/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 46. ADC SFR Memory Map

Bit Register Name

SFR

Reg

Reset

Value

Comments

Addr Name

7

6

5

4

3

2

1

0

8-bit

95

ASCL

00 Prescaler for

ADC clock

ADC Data

00

96

97

ADAT

ADAT7

ADAT6 ADAT5 ADAT4 ADAT3 ADAT2 ADAT1 ADAT0

Register

ADC Control

ACON

ADEN

ADS1

ADS0

ADST

ADSF

00

Register

Table 47. Description of the ACON Bits

Bit

Symbol

—

Function

7 to 6

Reserved

ADEN

ADC Enable Bit: 0 : ADC shut off and consumes no operating current

1 : enable ADC

5

4

—

Reserved

ADS1, ADS0 Analog channel select

0, 0

0, 1

1, 0

1, 1

Channel0 (ACH0)

Channel1 (ACH1)

Channel2 (ACH2)

Channel3 (ACH3)

3 to 2

ADST

ADC Start Bit:

0 : force to zero

1 : start an ADC; after one cycle, bit is cleared to '0'

1

0

ADSF

ADC Status Bit: 0 : A/D conversion is in process

1 : A/D conversion is completed, not in process

Table 48. ADC Clock Input

MCU Clock Frequency

Prescaler Register Value

ADC Clock

6.7MHz

40MHz

36MHz

24MHz

12MHz

2

1

0

6MHz

66/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PULSE WIDTH MODULATION (PWM)

The PWM block has the following features:

fined by the contents of the corresponding Special

Function Register (PWM 0-3) of a PWM. By load-

ing the corresponding Special Function Register

(PWM 0-3) with either 00H or FFH, the PWM out-

put can be retained at a constant HIGH or LOW

level respectively (with PWML = 0).

■

Four-channel, 8-bit PWM unit with 16-bit

prescaler

One-channel, 8-bit unit with programmable

frequency and pulse width

PWM Output with programmable polarity

For each PWM unit, there is a 16-bit Prescaler that

are used to divide the main system clock to form

the input clock for the corresponding PWM unit.

This prescaler is used to define the desired repeti-

tion rate for the PWM unit. SFR registers B1h -

B2h are used to hold the 16-bit divisor values.

4-channel PWM Unit (PWM 0-3)

The 8-bit counter of a PWM counts module 256

(i.e., from 0 to 255, inclusive). The value held in

the 8-bit counter is compared to the contents of the

Special Function Register (PWM 0-3) of the corre-

sponding PWM. The polarity of the PWM outputs

is programmable and selected by the PWML Bit in

PWMCON register. Provided the contents of a

PWM 0-3 register is greater than the counter val-

ue, the corresponding PWM output is set HIGH

(with PWML = 0). When the contents of this regis-

ter is less than or equal to the counter value, the

corresponding PWM output is set LOW (with

PWML = 0). The pulse-width-ratio is therefore de-

The repetition frequency of the PWM output is giv-

en by:

fPWM = (f

/ prescaler0) / (2 x 256)

OSC

8

And the input clock frequency to the PWM

counters is = f / 2 / (prescaler data value + 1)

OSC

See I/O PORTS (MCU MODULE), page 42 for

more information on how to configure the Port 4

pin as PWM output.

Figure 36. Four-Channel 8-bit PWM Block Diagram

DATA BUS

8

x 4

8-bit PWM0-PWM3

Data Registers

CPU rd/wr

x 4

load

8-bit PWM0-PWM3

Comparators Registers

x 4

Port4.3

Port4.4

Port4.5

Port4.6

16-bit Prescaler

8-bit PWM0-PWM3

Comparators

4

CPU rd/wr

Register

(B2h,B1h)

PWMCON bit7 (PWML)

8

8-bit Counter

16-bit Prescaler

Counter

f

_OSC/2

Overflow

clock

load

PWMCON bit5 (PWME)

AI06647

67/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 49. PWM SFR Memory Map

Bit Register Name

SFR

Reset Comment

Reg Name

Addr

Value

s

7

6

5

4

3

2

1

0

PWM

Control

Polarity

A1

A2

A3

A4

PWMCON PWML PWMP PWME CFG4

CFG3 CFG2 CFG1

CFG0

00

PWM0

Output

Duty Cycle

PWM0

PWM1

PWM2

00

PWM1

Output

Duty Cycle

PWM2

Output

Duty Cycle

PWM3

Output

Duty Cycle

A5

AA

AB

PWM3

PWM4P

PWM4W

00

PWM 4

Period

PWM 4

Pulse

Width

Prescaler0

Low (8-bit)

B1

B2

B3

B4

PSCL0L

PSCL0H

PSCL1L

PSCL1H

00

Prescaler0

High (8-bit)

Prescaler1

Low (8-bit)

Prescaler1

High (8-bit)

PWMCON Register Bit Definition:

–

PWML = PWM 0-3 polarity control

PWMP = PWM 4 polarity control

PWME = PWM enable (0 = disabled, 1=

enabled)

–

CFG3..CFG0 = PWM 0-3 Output (0 = Open

Drain; 1 = Push-Pull)

CFG4 = PWM 4 Output (0 = Open Drain; 1 =

Push-Pull)

68/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Programmable Period 8-bit PWM

The PWM 4 channel can be programmed to pro-

vide a PWM output with variable pulse width and

period. The PWM 4 has a 16-bit Prescaler, an 8-

bit Counter, a Pulse Width Register, and a Period

Register. The Pulse Width Register defines the

PWM pulse width time, while the Period Register

defines the period of the PWM. The input clock to

the Prescaler is f

/2. The PWM 4 channel is as-

OSC

signed to Port 4.7.

Figure 37. Programmable PWM 4 Channel Block Diagram

DATA BUS

8

8-bit PWM4P

CPU RD/WR

8-bit PWM4W

Register

(Period)

(Width)

8

8-bit PWM4

Comparator

Register

8-bit PWM4

Comparator

Register

Load

16-bit Prescaler

CPU RD/WR

Register

Port 4.7

(B4h, B3h)

PWM4

Control

8

16

PWMCON

Bit 6 (PWMP)

8-bit PWM4

Comparator

8-bit PWM4

Comparator

f

/ 2

OSC

Match

16-bit Prescaler

Counter

8

Load

PWMCON

Bit 5 (PWME)

8-bit Counter

Clock

Reset

AI07091

69/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PWM 4 Channel Operation

The 16-bit Prescaler1 divides the input clock

(f /2) to the desired frequency, the resulting

clock runs the 8-bit Counter of the PWM 4 chan-

nel. The input clock frequency to the PWM 4

Counter is:

Counter output. When the content of the counter is

equal to or greater than the value in the Pulse

Width Register, it sets the PWM 4 output to low

(with PWMP Bit = 0). When the Period Register

equals to the PWM4 Counter, the Counter is

cleared, and the PWM 4 channel output is set to

logic 'high' level (beginning of the next PWM

pulse).

The Period Register cannot have a value of “00”

and its content should always be greater than the

Pulse Width Register.

The Prescaler1 Register, Pulse Width Register,

and Period Register can be modified while the

PWM 4 channel is active. The values of these reg-

isters are automatically loaded into the Prescaler

Counter and Comparator Registers when the cur-

rent PWM 4 period ends.

OSC

f PWM4 = (f

/2)/(Prescaler1 data value +1)

OSC

When the Prescaler1 Register (B4h, B3h) is set to

data value '0,' the maximum input clock frequency

to the PWM 4 Counter is f

as 20MHz.

/2 and can be as high

OSC

The PWM 4 Counter is a free-running, 8-bit

counter. The output of the counter is compared to

the Compare Registers, which are loaded with

data from the Pulse Width Register (PWM4W,

ABh) and the Period Register (PWM4P, AAh). The

Pulse Width Register defines the pulse duration or

the Pulse Width, while the Period Register defines

the period of the PWM. When the PWM 4 channel

is enabled, the register values are loaded into the

Comparator Registers and are compared to the

The PWMCON Register (Bits 5 and 6) controls the

enable/disable and polarity of the PWM 4 channel.

Figure 38. PWM 4 With Programmable Pulse Width and Frequency

Defined by Period Register

PWM4

Defined by Pulse

Switch Level

RESET

Counter

Width Register

AI07090

70/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

I²C INTERFACE

There are two serial I C ports implemented in the

uPSD323X Devices.

2

The I C serial I/O has complete autonomy in byte

handling and operates in 4 modes.

2

The serial port supports the twin line I C-bus, con-

■

Master transmitter

Master receiver

Slave transmitter

Slave receiver

sists of a data line (SDAx) and a clock line (SCLx).

Depending on the configuration, the SDA and SCL

lines may require pull-up resistors.

■

SDA1, SCL1: the serial port line for DDC

Protocol

These functions are controlled by the SFRs.

■

SxCON: the control of byte handling and the

operation of 4 mode.

SxSTA: the contents of its register may also

be used as a vector to various service

routines.

SxDAT: data shift register.

SxADR: slave address register. Slave address

recognition is performed by On-Chip H/W.

■

SDA2, SCL2: the serial port line for general

2

I C bus connection

2

■

In both I C interfaces, these lines also function as

I/O port lines as follows.

■

SDA1 / P4.0, SCL1 / P4.1, SDA2 / P3.6, SCL2

/ P3.7

■

The system is unique because data transport,

clock generation, address recognition and bus

control arbitration are all controlled by hardware.

2

Figure 39. Block Diagram of the I C Bus Serial I/O

7

0

Slave Address

Shift Register

7

0

SDAx

SCLx

Arbitration and Sync. Logic

Bus Clock Generator

7

0

Control Register

Status Register

0

AI06649

Table 50. Serial Control Register (SxCON: S1CON, S2CON)

7

6

5

4

3

2

1

0

CR2

ENII

STA

STO

ADDR

AA

CR1

CR0

71/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 51. Description of the SxCON Bits

Bit

Symbol

Function

This bit along with Bits CR1and CR0 determines the serial clock frequency when SIO is

in the Master Mode.

7

CR2

Enable IIC. When ENI1 = 0, the IIC is disabled. SDA and SCL outputs are in the high

impedance state.

6

5

ENII

STA

2

START flag. When this bit is set, the SIO H/W checks the status of the I C-bus and

generates a START condition if the bus free. If the bus is busy, the SIO will generate a

repeated START condition when this bit is set.

STOP flag. With this bit set while in Master Mode a STOP condition is generated.

2

When a STOP condition is detected on the I C-bus, the I C hardware clears the STO

flag.

Note: This bit have to be set before 1 cycle interrupt period of STOP. That is, if this bit is

set, STOP condition in Master Mode is generated after 1 cycle interrupt period.

4

3

STO

ADDR

This bit is set when address byte was received. Must be cleared by software.

Acknowledge enable signal. If this bit is set, an acknowledge (low level to SDA) is

returned during the acknowledge clock pulse on the SCL line when:

• Own slave address is received

2

AA

• A data byte is received while the device is programmed to be a Master Receiver

• A data byte is received while the device is a selected Slave Receiver. When this bit is

reset, no acknowledge is returned.

SIO release SDA line as high during the acknowledge clock pulse.

1

0

CR1

CR0

These two bits along with the CR2 Bit determine the serial clock frequency when SIO is

in the Master Mode.

Table 52. Selection of the Serial Clock Frequency SCL in Master Mode

Bit Rate (kHz) at f

OSC

f

Divisor

CR2

CR1

CR0

OSC

12MHz

375

250

200

100

50

24MHz

750

500

400

200

100

50

36MHz

X

40MHz

X

0

1

0

1

0

1

0

1

0

1

0

1

0

1

16

24

750

600

300

150

75

833

666

333

166

83

30

60

120

240

480

960

25

12.5

6.25

25

37.5

18.75

41

12.5

20

72/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Serial Status Register (SxSTA: S1STA, S2STA)

SxSTA is a “Read-only” register. The contents of

this register may be used as a vector to a service

routine. This optimized the response time of the

3. A data byte has been received or transmitted

in Master Mode (even if arbitration is lost):

ack_int

4. A data byte has been received or transmitted

as selected slave: ack_int

5. A stop condition is received as selected slave

receiver or transmitter: stop_int

Data Shift Register (SxDAT: S1DAT, S2DAT)

SxDAT contains the serial data to be transmitted

or data which has just been received. The MSB

(Bit 7) is transmitted or received first; that is, data

shifted from right to left.

2

software and consequently that of the I C-bus.

2

The status codes for all possible modes of the I C-

bus interface are given Table 54.

This flag is set, and an interrupt is generated, after

any of the following events occur.

1. Own slave address has been received during

AA = 1: ack_int

2. The general call address has been received

while GC(SxADR.0) = 1 and AA = 1:

Table 53. Serial Status Register (SxSTA)

7

6

5

4

3

2

1

0

GC

STOP

INTR

TX_MODE

BBUSY

BLOST

/ACK_REP

SLV

Table 54. Description of the SxSTA Bits

Bit

7

Symbol

GC

Function

General Call Flag

Stop Flag. This bit is set when a STOP condition is received

6

STOP

(1,2)

5

Interrupt Flag. This bit is set when an I²C Interrupt condition is requested

INTR

Transmission Mode Flag.

This bit is set when the I²C is a transmitter; otherwise this bit is reset

4

3

2

TX_MODE

BBUSY

Bus Busy Flag.

This bit is set when the bus is being used by another master; otherwise, this bit is reset

Bus Lost Flag.

BLOST

This bit is set when the master loses the bus contention; otherwise this bit is reset

Acknowledge Response Flag.

1

0

/ACK_REP This bit is set when the receiver transmits the not acknowledge signal

This bit is reset when the receiver transmits the acknowledge signal

Slave Mode Flag.

SLV

This bit is set when the I²C plays role in the Slave Mode; otherwise this bit is reset

Note: 1. Interrupt Flag Bit (INTR, SxSTA Bit 5) is cleared by Hardware as reading SxSTA register.

2

2. I C Interrupt Flag (INTR) can occur in below case. (except DDC2B Mode at SWENB=0)

Table 55. Data Shift Register (SxDAT: S1DAT, S2DAT)

7

6

5

4

3

2

1

0

SxDAT7

SxDAT6

SxDAT5

SxDAT4

SxDAT3

SxDAT2

SxDAT1

SxDAT0

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Address Register (SxADR: S1ADR, S2ADR)

2

This 8-bit register may be loaded with the 7-bit

slave address to which the controller will respond

when programmed as a slave receive/transmitter.

The Start/Stop Hold Time Detection and System

Clock registers (Tables 57 and 58) are included in

the I C unit to specify the start/stop detection time

to work with the large range of MCU frequency val-

ues supported. For example, with a system clock

of 40MHz.

Table 56. Address Register (SxADR)

7

6

5

4

3

2

1

0

SLA6

SLA5

SLA4

SLA3

SLA2

SLA1

SLA0

—

Note: 1. SLA6 to SLA0: Own slave address.

Table 57. Start /Stop Hold Time Detection Register (S1SETUP, S2SETUP)

Address Register Name Reset Value

Note

To control the start/stop hold time detection for the DDC module

in Slave Mode

D1h

D2h

S1SETUP

S2SETUP

00h

SFR

To control the start/stop hold time detection for the multi-master

I²C module in Slave Mode

Table 58. System Cock of 40MHz

Number of Sample

Clock (f /2 ->

S1SETUP,

S2SETUP Register

Value

Required Start/

Stop Hold Time

Note

OSC

50ns)

When Bit 7 (enable bit) = 0, the number of

sample clock is 1EA (ignore Bit 6 to Bit 0)

00h

1EA

50ns

80h

81h

82h

...

1EA

2EA

3EA

...

50ns

100ns

150ns

...

8Bh

...

12EA

...

600ns

...

Fast Mode I²C Start/Stop hold time specification

FFh

128EA

6000ns

Table 59. System Clock Setup Examples

S1SETUP,

S2SETUP Register

Number of Sample

System Clock

40MHz (f /2 -> 50ns)

Required Start/Stop Hold Time

Clock

Value

8Bh

89h

12 EA

9 EA

6 EA

3 EA

600ns

750ns

OSC

30MHz (f

/2 -> 66.6ns)

OSC

20MHz (f

8MHz (f

/2 -> 100ns)

86h

OSC

/2 -> 250ns)

83h

OSC

74/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

DDC INTERFACE

2

The basic DDC unit consists of an I C interface

and 256 bytes of SRAM for DDC data storage. The

8032 core is responsible of loading the contents of

the SRAM with the DDC data. The DDC unit has

the following features:

–

Supports fully automatic operation of DDC1

and DDC2b Modes

DDC operates in Slave Mode only.

–

SW Interrupt Mode available (existing design)

The interface signals for the DDC can be mapped

to pins in Port 4. The interface consists of the stan-

dard V

DDC signals. The conceptual block diagram is il-

lustrated in Figure 43.

–

Supports both DDC1 and DDC2b Modes.

Features 256 bytes of DDC data - initialized by

the 8032

(P4.2), SDA (P4.0) and SCL (P4.1)

SYNC

Figure 40. DDC Interface Block Diagram

7

1

0

DDC2B/DDC2AB

DDC2B+Interface

Monitor Address

Shift Register

S1ADR0

S1ADR1

S1DAT

SDA1

SCL1

Arbitration Logic

Bus Clock Generator

RAMBUF

SICON

SISTA

RAM

Buffer

DDC1/DDC2

Detection

DDC1 Hold Register

DDCDAT

DDC1 Transmitter

VSYNC_EN

Address Pointer

DDCADR

Initialization Synchronization

EX_ SW

DAT ENB

DDC1DDC1SWH

INT EN INT

INTR (from SISTA)

X

M0

DDCCON

INT

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Special Function Register for the DDC Interface

There are eight SFR in the DDC interface:

DDCADR Register. Address pointer for DDC in-

terface (DDCADR: 0D6H)

RAMBUF, DDCCON, DDCADR, DDCDAT are

DDC registers.

■

8-bit READ and WRITE register.

2

S1CON, S1STA, S1DAT, S1ADR are I C Inter-

■

Address pointer with the capability of the post

increment. After each access to RAMBUF

register (either by software or by hardware

DDC1 interface), the content of this register

will be increased by one. It’s available both in

DDC1, DDC2 (DDC2B, DDC2B+, and

DDC2AB) and system operation.

face registers, same as the ones described in the

2

standalone I C bus.

DDCDAT Register. DDC1 DATA register for

transmission (DDCDAT: 0D5H)

■

8-bit READ and WRITE register.

■

Indicates DATA BYTE to be transmitted in

DDC1 protocol.

Table 60. DDC SFR Memory Map

Bit Register Name

SFR

Addr Name

Reg

Reset

Comments

Value

7

6

5

4

3

2

1

0

DDC Ram

Buffer

D4 RAMBUF

XX

00

DDC Data

xmit register

D5 DDCDAT

D6 DDCADR

D7 DDCCON

Addr pointer

register

DDC Control

Register

—

EX_DAT SWENB DDC_AX DDCINT DDC1EN SWHINT

M0

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 61. Description of the DDCON Register Bits

Bit

Symbol

Function

7

—

Reserved

0 = The SRAM has 128 bytes (Default)

1 = The SRAM has 256 bytes

6

5

EX_DAT

SWENB

Note: This bit is valid for DDC1 & DDC2b Modes

0 = Data is automatically read from SRAM at the current location of DDCADR and sent

out via current DDC protocol. (Default)

1 = MCU is interrupted during the current data byte transmission period to load the next

byte of data to send out.

Note: This bit is valid for DDC1 & DDC2b Modes

0 = Data is automatically read from SRAM at the current location of DDCADR and sent

out via current DDC protocol. (Default)

1 = MCU is interrupted during the current data byte transmission period to load the next

byte of data to send out.

4

DDC_AX

This bit only affects DDC2b Mode Operation:

0 = DDC2b I2C Address is A0/A1 (default)

1 = DDC2b I2C Address is AX. Least 3 significant address bits are ignored.

For DDC1 Mode Operation Only:

0 = No DDC1 Interrupt

1 = DDC1 Interrupt request. Set by HW and should be cleared by SW interrupt service

routine.

3

2

1

DDC1_Int

DDC1EN

SWHINT

Note1: This bit is set in the 9th V

at DDC1 Enable Mode. (SWENB=1)

is ignored.

CLK

0 = DDC1 Mode is disabled – V

SYNC

The DDC unit will still respond to DDC2b requests. –provided I2C enabled.(Default)

1 = DDC1 Mode is enabled.

Set by hardware when the DDC unit switches from DDC1 to DDC2b Modes.

0 = No interrupt request.

1 = Switch to DDC2b Mode (Interrupt pending)

Set by HW and should be cleared by SW interrupt service routine.

Note1: This bit has no connection with SWENB.

Current Mode Indication Bit:

0 = Unit is in DDC1 Mode

0

Mode

1 = Unit is in DDC2b Mode

Note: When the DDC unit transitions to DDC2b Mode, the DDC unit will stay in DDC2b

Mode until the DDC unit is disabled, or the system is reset.

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 62. SWNEB Bit Function

DDC1 or DDC2b Mode Disabled

DDC1 or DDC2b Mode Enabled

SWENB

DDCCON.bit2 = 0 (DDC1 Mode Disable) or

DDCCON.bit2 = 1 (DDC1 Mode Enable) or

2

S1CON.bit6 = 0 (I C Mode Disable)

S1CON.bit6 = 1 (I C Mode Enable)

In this state, the DDC unit is disabled. The DDC

In this state, the DDC is enabled and the unit is in

SRAM cannot be accessed by the MCU. No MCU automatic mode. The DDC SRAM cannot be

interrupt and no DDC activity will occur.

MCU cannot access internal DDC SRAM: DDC

SRAM address space is re-assigned to external

data space.

accessed by the MCU – only the DDC unit has

access.

MCU cannot access internal DDC SRAM: data

space FF00h-FFFFh is dedicated to DDC SRAM.

0

In this state, the DDC SRAM can be accessed by

the MCU. The DDC unit does not use the DDC

SRAM when SWENB=1. Since the DDC unit is in

manual mode, the DDC unit generates an MCU

interrupt for each byte transferred. The byte

In this state, the DDC unit is disabled, BUT with

SWENB=1, the MCU can access the SRAM. This

state is used to load the DDC SRAM with the

correct data for automatic modes. No MCU

interrupt and no DDC activity will occur.

1

2

MCU can access DDC SRAM: data space FF00h-

FFFFh is dedicated to DDC SRAM.

transferred is held in the I C S1DAT SFR register.

MCU can access DDC SRAM.

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Host Type Detection

The detection procedure conforms to the se-

quences proposed by VESA Monitor Display Data

Channel (DDC) specification. The monitor needs

to determine the type of host system:

■

DDC1 or OLD type host.

DDC2B host (Host is master, monitor is

always slave)

■

DDC2B+/DDC2AB(ACCESS.bus) host.

Figure 41. Host Type Detection

Communication

isidle

Power on

Is VSYNC present?

EDID sent continously using

VSYNC as clock

Is DDC2 clock

present?

DDC2 communication

is idle.

Stop sending of EDID

switch to DDC2

communication mode

Has a command

been received?

Is 2B+/A.B

command detected?

Is it DDC2B

command?

Is

DDC2B+/DDC2AB?

Respond to

DDC2B command

Respond to DDC2B+/

DDC2AB command

AI06644

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

DDC1 Protocol

DDC1 is primitive and a point to point interface.

The monitor is always put at “Transmit only” mode.

The maximum V

(40µs). And the 9th clock of V

rupt period.

(V

) frequency is 25Khz

CLK

SYNC

(V

) is inter-

SYNC

CLK

In the initialization phase, 9 clock cycles on V

CLK

pin will be given for the internal synchronization.

During this period, the SDA pin will be kept at high

impedance state.

If DDC1 hardware mode is used, the following pro-

cedure is recommended to proceed DDC1 opera-

tion.

So the machine cycle be needed is calculated as

below. For example,

When 40MHz system clock, 40µs = 133 x (25ns x

12); 133 machine cycle.

12MHz system clock, 40µs = 40 x (83.3ns x 12);

40 machine cycle.

1. Reset DDC1 enable (by default, DDC1 enable

is cleared as LOW after Power-on Reset).

8MHz system clock, 40µs = 26 x (125ns x 12); 26

machine cycle.

2. Set SWENB as high (the default value is zero.)

Note: If EX_DAT equals to LOW, it is meant the

lower part is occupied by DDC1 operation and the

upper part is still free to the system. Nevertheless,

the effect of the post increment just applies to the

part related to DDC1 operation. In other words, the

system program is still able to address the loca-

tions from 128 to 255 in the RAM buffer through

MOVX command but without the facility of the post

increment. For example, the case of accessing

200 of the RAM Buffer:

3. Depending on the data size of EDID data, set

EX_DAT as LOW (128 bytes) or HIGH (256

bytes).

4. By using bulky moving commands (DDCADR,

RAMBUF involved) to move the entire EDID

data to RAM buffer.

5. Reset SWENB to LOW.

6. Reset DDCADR to 00h.

7. Set DDC1 enable as HIGH.

In case SWENB is set as high, interrupt service

routine is finished within 133 machine cycle in

40MHz System clock.

MOV R0, #200, and

MOVX A, @R0

Figure 42. Transmission Protocol in the DDC1 Interface

Max=40us

SC

VCLK

1

2

3

4

5

6

7

8

9

1

2

3

4

5

6

7

8

9

1

DDC1INT

DDC1EN

SD

B

HiZ

B

Hi-Z

t

DOV

SU(DDC1)

H(VCLK)

L(VCLK)

AI06652

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

DDC2B Protocol

2

DDC2B is constructed based on the Philips I C in-

terface. However, in the level of DDC2B, PC host

is fixed as the master and the monitor is always re-

garded as the slave. Both master and slave can be

operated as a transmitter or receiver, but the mas-

ter device determines which mode is activated. In

this protocol, address pointer is also used.

The reception of the incoming data in WRITE

Mode or the updating of the outgoing data in

READ Mode should be finished within the speci-

fied time limit. If software in the slave’s side cannot

2

react to the master in time, based on I C protocol,

SCL pin can be stretched low to inhibit the further

action from the master. The transaction can be

proceeded in either byte or burst format.

According to DDC2B specification, A0 (for WRITE

Mode) and A1 (for READ Mode) are assigned as

the default address of monitors.

Figure 43. Conceptual Structure of the DDC Interface

DDC Interrupt

vector address

(

0023H

)

Check Mode flag in DDCCON

Mode = 1 Mode = 1 Mode = 0

DDC2B/DDC2AB

commandreceived

DDC2B

SWENB =1

SWENB =0

DDC1.DDC2B

DDC2B

Utilities

DDC2B/DDC2AB

Utilities

I2C

DDC Transmitter

(H/W)

ServiceRoutines

I2C interface

(H/W)

AI06645

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

USB HARDWARE

The characteristics of USB hardware are as fol-

lows:

USB data stream and is able to track jitter and fre-

quency drift according to the USB specification.

The SIE also translates the electrical USB signals

into bytes or signals. Depending upon the device

USB address and the USB endpoint.

Address, the USB data is directed to the correct

endpoint on SIE interface. The data transfer of this

H/W could be of type control or interrupt.

The device’s USB address and the enabling of the

endpoints are programmable in the SIE configura-

tion header.

■

Complies with the Universal Serial Bus

specification Rev. 1.1

■

Integrated SIE (Serial Interface Engine), FIFO

memory and transceiver

■

Low speed (1.5Mbit/s) device capability

Supports control endpoint0 and interrupt

endpoint1 and 2

■

USB clock input must be 6MHz (requires MCU

clock frequency to be 12, 24, or 36MHz).

USB related registers

The analog front-end is an on-chip generic USB

transceiver. It is designed to allow voltage levels

The USB block is controlled via seven registers in

the memory: (UADR, UCON0, UCON1, UCON2,

UISTA, UIEN, and USTA).

Three memory locations on chip which communi-

cate the USB block are:

equal to V

from the standard logic to interface

DD

with the physical layer of the Universal Serial Bus.

It is capable of receiving and transmitting serial

data at low speed (1.5Mb/s).

■

USB endpoint0 data transmit register (UDT0)

USB endpoint0 data receive register (UDR0)

USB endpoint1 data transmit register (UDT1)

The SIE is the digital-front-end of the USB block.

This module recovers the 1.5MHz clock, detects

the USB sync word and handles all low-level USB

protocols and error checking. The bit-clock recov-

ery circuit recovers the clock from the incoming

Table 63. USB Address Register (UADR: 0EEh)

7

6

5

4

3

2

1

0

USBEN

UADD6

UADD5

UADD4

UADD3

UADD2

UADD1

UADD0

Table 64. Description of the UADR Bits

Bit

Symbol

R/W

Function

USB Function Enable Bit.

When USBEN is clear, the USB module will not respond to any tokens

from host.

7

USBEN

R/W

RESET clears this bit.

UADD6 to

UADD0

Specify the USB address of the device.

RESET clears these bits.

6 to 0

R/W

Table 65. USB Interrupt Enable Register (UIEN: 0E9h)

7

6

5

4

3

2

1

0

SUSPNDI

RSTE

RSTFIE

TXD0IE

RXD0IE

TXD1IE

EOPIE

RESUMI

82/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 66. Description of the UIEN Bits

Bit

Symbol

R/W

Function

7

SUSPNDI

R/W

Enable SUSPND Interrupt

Enable USB Reset; also resets the CPU and PSD Modules when bit is

set to '1.'

6

RSTE

R/W

5

4

3

2

1

0

RSTFIE

TXD0IE

RXD0IE

TXD1IE

EOPIE

R/W

Enable RSTF (USB Bus Reset Flag) Interrupt

Enable TXD0 Interrupt

Enable RXD0 Interrupt

Enable TXD1 Interrupt

Enable EOP Interrupt

RESUMI

Enable USB Resume Interrupt when it is the Suspend Mode

Table 67. USB Interrupt Status Register (UISTA: 0E8h)

7

6

5

4

3

2

1

0

SUSPND

—

RSTF

TXD0F

RXD0F

TXD1F

EOPF

RESUMF

83/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 68. Description of the UISTA Bits

Bit

Symbol

R/W

Function

USB Suspend Mode Flag.

To save power, this bit should be set if a 3ms constant idle state is

detected on USB bus. Setting this bit stops the clock to the USB and

causes the USB module to enter Suspend Mode. Software must clear

this bit after the Resume flag (RESUMF) is set while this Resume

Interrupt Flag is serviced

7

SUSPND

R/W

6

5

—

R

Reserved

USB Reset Flag.

This bit is set when a valid RESET signal state is detected on the D+ and

D- lines. When the RSTE bit in the UIEN Register is set, this reset

detection will also generate an internal reset signal to reset the CPU and

other peripherals including the USB module.

RSTF

Endpoint0 Data Transmit Flag.

This bit is set after the data stored in Endpoint 0 transmit buffers has

been sent and an ACK handshake packet from the host is received.

Once the next set of data is ready in the transmit buffers, software must

clear this flag. To enable the next data packet transmission, TX0E must

also be set. If TXD0F Bit is not cleared, a NAK handshake will be

returned in the next IN transactions. RESET clears this bit.

4

3

TXD0F

RXD0F

R/W

Endpoint0 Data Receive Flag.

This bit is set after the USB module has received a data packet and

responded with ACK handshake packet. Software must clear this flag

after all of the received data has been read. Software must also set

RX0E Bit to one to enable the next data packet reception. If RXD0F Bit is

not cleared, a NAK handshake will be returned in the next OUT

transaction. RESET clears this bit.

Endpoint1 / Endpoint2 Data Transmit Flag.

This bit is shared by Endpoints 1 and Endpoints 2. It is set after the data

stored in the shared Endpoint 1/ Endpoint 2 transmit buffer has been sent

and an ACK handshake packet from the host is received. Once the next

set of data is ready in the transmit buffers, software must clear this flag.

To enable the next data packet transmission, TX1E must also be set. If

TXD1F Bit is not cleared, a NAK handshake will be returned in the next

IN transaction. RESET clears this bit.

2

TXD1F

R/W

End of Packet Flag.

1

0

EOPF

R/W

This bit is set when a valid End of Packet sequence is detected on the D+

and D-line. Software must clear this flag. RESET clears this bit.

Resume Flag.

This bit is set when USB bus activity is detected while the SUSPND Bit is

set.

RESUMF

Software must clear this flag. RESET clears this bit.

Table 69. USB Endpoint0 Transmit Control Register (UCON0: 0EAh)

7

6

5

4

3

2

1

0

TSEQ0

STALL0

TX0E

RX0E

TP0SIZ3

TP0SIZ2

TP0SIZ1

TP0SIZ0

84/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 70. Description of the UCON0 Bits

Bit

Symbol

R/W

Function

Endpoint0 Data Sequence Bit. (0=DATA0, 1=DATA1)

This bit determines which type of data packet (DATA0 or DATA1) will be

sent during the next IN transaction. Toggling of this bit must be controlled

by software. RESET clears this bit

7

TSEQ0

R/W

Endpoint0 Force Stall Bit.

This bit causes Endpoint 0 to return a STALL handshake when polled by

either an IN or OUT token by the USB Host Controller. The USB

hardware clears this bit when a SETUP token is received. RESET clears

this bit.

6

5

STALL0

TX0E

R/W

Endpoint0 Transmit Enable.

This bit enables a transmit to occur when the USB Host Controller sends

an IN token to Endpoint 0. Software should set this bit when data is ready

to be transmitted. It must be cleared by software when no more Endpoint

0 data needs to be transmitted. If this bit is '0' or the TXD0F is set, the

USB will respond with a NAK handshake to any Endpoint 0 IN tokens.

RESET clears this bit.

Endpoint0 receive enable.

This bit enables a receive to occur when the USB Host Controller sends

an OUT token to Endpoint 0. Software should set this bit when data is

ready to be received. It must be cleared by software when data cannot be

received. If this bit is '0' or the RXD0F is set, the USB will respond with a

NAK handshake to any Endpoint 0 OUT tokens. RESET clears this bit.

4

RX0E

R/W

TP0SIZ3 to

TP0SIZ0

3 to 0

The number of transmit data bytes. These bits are cleared by RESET.

Table 71. USB Endpoint1 (and 2) Transmit Control Register (UCON1: 0EBh)

7

6

5

4

3

2

1

0

TSEQ1

EP12SEL

TX1E

FRESUM

TP1SIZ3

TP1SIZ2

TP1SIZ1

TP1SIZ0

85/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 72. Description of the UCON1 Bits

Bit

Symbol

R/W

Function

Endpoint 1/ Endpoint 2 Transmit Data Packet PID. (0=DATA0, 1=DATA1)

This bit determines which type of data packet (DATA0 or DATA1) will be

sent during the next IN transaction directed to Endpoint 1 or Endpoint 2.

Toggling of this bit must be controlled by software. RESET clears this bit.

7

TSEQ1

R/W

Endpoint 1/ Endpoint 2 Transmit Selection. (0=Endpoint 1, 1=Endpoint 2)

This bit specifies whether the data inside the registers UDT1 are used for

Endpoint 1 or Endpoint 2. If all the conditions for a successful Endpoint 2

USB response to a hosts IN token are satisfied (TXD1F=0, TX1E=1,

STALL2=0, and EP2E=1) except that the EP12SEL Bit is configured for

Endpoint 1, the USB responds with a NAK handshake packet. RESET

clears this bit.

6

EP12SEL

R/W

Endpoint1 / Endpoint2 Transmit Enable.

This bit enables a transmit to occur when the USB Host Controller send

an IN token to Endpoint 1 or Endpoint 2. The appropriate endpoint

enable bit, EP1E or EP2E Bit in the UCON2 register, should also be set.

Software should set the TX1E Bit when data is ready to be transmitted. It

must be cleared by software when no more data needs to be transmitted.

If this bit is '0' or TXD1F is set, the USB will respond with a NAK

handshake to any Endpoint 1 or Endpoint 2 directed IN token.

RESET clears this bit.

5

TX1E

R/W

Force Resume.

This bit forces a resume state (“K” on non-idle state) on the USB data

lines to initiate a remote wake-up. Software should control the timing of

the forced resume to be between 10ms and 15ms. Setting this bit will not

cause the RESUMF Bit to set.

4

FRESUM

R/W

TP1SIZ3 to

TP1SIZ0

3 to 0

The number of transmit data bytes. These bits are cleared by RESET.

Table 73. USB Control Register (UCON2: 0ECh)

7

6

5

4

3

2

1

0

—

SOUT

EP2E

EP1E

STALL2

STALL1

Table 74. Description of the UCON2 Bits

Bit

Symbol

R/W

Function

7 to 5

—

Reserved

Status out is used to automatically respond to the OUT of a control

READ transfer

4

SOUT

R/W

3

2

1

0

EP2E

EP1E

R/W

Endpoint2 enable. RESET clears this bit

Endpoint1 enable. RESET clears this bit

Endpoint2 Force Stall Bit. RESET clears this bit

Endpoint1 Force Stall Bit. RESET clears this bit

STALL2

STALL1

Table 75. USB Endpoint0 Status Register (USTA: 0EDh)

7

6

5

4

3

2

1

0

RSEQ

SETUP

IN

OUT

RP0SIZ3

RP0SIZ2

RP0SIZ1

RP0SIZ0

86/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 76. Description of the USTA Bits

Bit

Symbol

R/W

Function

Endpoint0 receive data packet PID. (0=DATA0, 1=DATA1)

This bit will be compared with the type of data packet last received for

Endpoint0

7

RSEQ

R/W

SETUP Token Detect Bit. This bit is set when the received token packet

is a SEPUP token, PID = b1101.

6

5

SETUP

IN

R

IN Token Detect Bit.

This bit is set when the received token packet is an IN token.

OUT Token Detect Bit.

This bit is set when the received token packet is an OUT token.

4

OUT

RP0SIZ3 to

RP0SIZ0

3 to 0

The number of data bytes received in a DATA packet

Table 77. USB Endpoint0 Data Receive Register (UDR0: 0EFh)

7

6

5

4

3

2

1

0

UDR0.7

UDR0.6

UDR0.5

UDR0.4

UDR0.3

UDR0.2

UDR0.1

UDR0.0

Table 78. USB Endpoint0 Data Transmit Register (UDT0: 0E7h)

7

6

5

4

3

2

1

0

UDT0.7

UDT0.6

UDT0.5

UDT0.4

UDT0.3

UDT0.2

UDT0.1

UDT0.0

Table 79. USB Endpoint1 Data Transmit Register (UDT1: 0E6h)

7

6

5

4

3

2

1

0

UDT1.7

UDT1.6

UDT1.5

UDT1.4

UDT1.3

UDT1.2

UDT1.1

UDT1.0

87/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

The USCL 8-bit Prescaler Register for USB is at

E1h. The USCL should be loaded with a value that

results in a clock rate of 6MHz for the USB using

the following formula:

Note: USB works ONLY with the MCU Clock fre-

quencies of 12, 24, or 36MHz. The Prescaler val-

ues for these frequencies are 0, 1, and 2.

USB clock input =

(f

/ 2) / (Prescaler register value +1)

OSC

Where f

is the MCU clock input frequency.

OSC

Table 80. USB SFR Memory Map

Bit Register Name

SFR Reg

Addr Name

Reset

Value

Comments

7

6

5

4

3

2

1

0

8-bit

E1 USCL

00 Prescaler for

USB logic

USB Endpt1

00

E6 UDT1

E7 UDT0

UDT1.7 UDT1.6 UDT1.5 UDT1.4 UDT1.3 UDT1.2 UDT1.1 UDT1.0

UDT0.7 UDT0.6 UDT0.5 UDT0.4 UDT0.3 UDT0.2 UDT0.1 UDT0.0

Data Xmit

USB Endpt0

00

Data Xmit

USB

E8 UISTA SUSPND

—

RSTF

TXD0F RXD0F RXD1F

EOPF RESUMF 00 Interrupt

Status

USB

E9 UIEN SUSPNDIE RSTE RSTFIE TXD0IE RXD0IE TXD1IE EOPIE RESUMIE 00 Interrupt

Enable

USB Endpt0

Xmit Control

EA UCON0 TSEQ0

STALL0

TX0E

—

RX0E TP0SIZ3 TP0SIZ2 TP0SIZ1 TP0SIZ0 00

FRESUM TP1SIZ3 TP1SIZ2 TP1SIZ1 TP1SIZ0 00

USB Endpt1

Xmit Control

EB UCON1 TSEQ1 EP12SEL

USB Control

Register

EC UCON2

ED USTA

—

SOUT

EP2E

EP1E

STALL2 STALL1

00

USB Endpt0

Status

RSEQ

SETUP

IN

OUT RP0SIZ3 RP0SIZ2 RP0SIZ1 RP0SIZ0 00

USB

EE UADR

EF UDR0

USBEN

UADD6 UADD5 UADD4 UADD3 UADD2 UADD1 UADD0

00 Address

Register

USB Endpt0

Data Recv

UDR0.7 UDR0.6 UDR0.5 UDR0.4 UDR0.3 UDR0.2 UDR0.1 UDR0.0

00

88/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Transceiver

USB Physical Layer Characteristics. The fol-

lowing section describes the uPSD323X Devices

compliance to the Chapter 7 Electrical section of

the USB Specification, Revision 1.1. The section

contains all signaling, and physical layer specifica-

tions necessary to describe a low speed USB

function.

tolerates a voltage on the signal pins of -0.5V to

3.6V with respect to local ground reference without

damage. The driver tolerates this voltage for

10.0µs while the driver is active and driving, and

tolerates this condition indefinitely when the driver

is in its high impedance state.

A low speed USB connection is made through an

unshielded, untwisted wire cable a maximum of 3

meters in length. The rise and fall time of the sig-

nals on this cable are well controlled to reduce RFI

emissions while limiting delays, signaling skews

and distortions. The uPSD323X Devices driver

reaches the specified static signal levels with

smooth rise and fall times, resulting in segments

between low speed devices and the ports to which

they are connected.

Low Speed Driver Characteristics. The

uPSD323X Devices use a differential output driver

to drive the Low Speed USB data signal onto the

USB cable. The output swings between the differ-

ential high and low state are well balanced to min-

imize signal skew. The slew rate control on the

driver minimizes the radiated noise and cross talk

on the USB cable. The driver’s outputs support

three-state operation to achieve bi-directional half

duplex operation. The uPSD323X Devices driver

Figure 44. Low Speed Driver Signal Waveforms

One Bit

Time

1.5 Mb/s

V

_SE(max)

Signal pins

pass output

spec levels

with minimal

reflections and

ringing

Driver

Signal Pins

V_SE(min)

V_SS

AI06629

89/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Receiver Characteristics

The uPSD323X Devices has a differential input re-

ceiver which is able to accept the USB data signal.

The receiver features an input sensitivity of at least

200mV when both differential data inputs are in

the range of at least 0.8V to 2.5V with respect to

its local ground reference. This is the common

mode range, as shown in Figure 45. The receiver

tolerates static input voltages between -0.5V to

3.8V with respect to its local ground reference

without damage. In addition to the differential re-

ceiver, there is a single-ended receiver for each of

the two data lines. The single-ended receivers

have a switching threshold between 0.8V and 2.0V

(TTL inputs).

Figure 45. Differential Input Sensitivity Over Entire Common Mode Range

1.0

0.8

0.6

0.4

0.2

0.0

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2

Common Mode Input Voltage (volts)

AI06630

90/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

External USB Pull-Up Resistor

The USB system specifies a pull-up resistor on the

D- pin for low-speed peripherals. The USB

Spec 1.1 describes a 1.5kΩ pull-up resistor to a

3.3V supply. An approved alternative method is a

tive is defined for low-speed devices with an inte-

grated cable. The chip is specified for the 7.5kΩ

pull-up. This eliminates the need for an external

3.3V regulator, or for a pin dedicated to providing

a 3.3V output from the chip.

7.5kΩ pull-up to the USB V supply. This alterna-

CC

Figure 46. USB Data Signal Timing and Voltage Levels

t_R

t_F

D+

V_OH

90%

VCR

10%

V_OL

D-

AI06631

Figure 47. Receiver Jitter Tolerance

T_PERIOD

Differential

Data Lines

T_JR2

T_JR

T_JR1

Consecutive

Transitions

N*T_PERIOD+T_JR1

Paired

Transitions

N*T_PERIOD+T_JR2

AI06632

91/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 48. Differential to EOP Transition Skew and EOP Width

T_PERIOD

Crossover

Point Extended

Crossover

Point

Differential

Data Lines

Diff. Data to

SE0 Skew

N*T_PERIOD+T_DEOP

Source EOP Width: T_EOPT

Receiver EOP Width

T

_EOPR1, T_EOPR2

AI06633

Figure 49. Differential Data Jitter

T_PERIOD

Crossover

Points

Differential

Data Lines

Consecutive

Transitions

N*T_PERIOD+T_xJR1

Paired

Transitions

N*T_PERIOD+T_xJR2

AI06634

92/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 81. Transceiver DC Characteristics

(1)

Symb

Parameter

Static Output High

Min

2.8

—

Max

3.6

Unit

V

Test Conditions

(2,3)

V

OH

15kΩ ± 5% to GND

V

OL

Static Output Low

Notes 2, 3

0.3

V

|(D+) - (D-)|, Figure

47., page 91

V

DI

Differential Input Sensitivity

0.2

—

V

Differential Input Common Mode

Single Ended Receiver Threshold

Transceiver Capacitance

Figure 47., page 91

0.8

2.5

2.0

V

CM

V

—

V

SE

C

—

20

pF

µA

kΩ

IN

I

IO

Data Line (D+, D-) Leakage

0V < (D+,D-) < 3.3

–10

7.35

14.25

10

R

7.5kΩ ± 2% to V

External Bus Pull-up Resistance, D-

External Bus Pull-down Resistance

7.65

15.75

PU

CC

R

15kΩ ± 5%

PD

Note: 1. V = 5V ± 10%; V = 0V; T = 0 to 70°C.

CC

SS

A

2. Level guaranteed for range of V = 4.5V to 5.5V.

CC

3. With RPU, external idle resistor, 7.5κ±2%, D- to V

.

CC

Table 82. Transceiver AC Characteristics

(1)

Symb

Parameter

Min

Max

Unit

Test Conditions

tDRATE

Low Speed Data Rate

Ave. bit rate (1.5Mb/s ± 1.5%)

1.4775

1.5225

Mbit/s

To next transition, Figure

tDJR1

Receiver Data Jitter Tolerance

–75

–45

75

45

ns

(5)

47., page 91

For paired transition, Figure

tDJR2

Differential Input Sensitivity

(5)

47., page 91

(5)

tDEOP

Differential to EOP Transition Skew

–40

165

100

—

ns

µs

Figure 48., page 92

(5,6)

tEOPR1 EOP Width at Receiver

tEOPR2 EOP Width at Receiver

Rejects as EOP

(5)

675

—

Accepts as EOP

tEOPT

tUDJ1

Source EOP Width

—

–1.25

1.50

To next transition, Figure

49., page 92

Differential Driver Jitter

–95

95

ns

To paired transition, Figure

49., page 92

tUDJ2

Differential Driver Jitter

–150

150

tR

tF

USB Data Transition Rise Time

USB Data Transition Fall Time

Rise/Fall Time Matching

Notes 2, 3, 4

75

80

1.3

300

120

2.0

ns

%

V

t

/ t

F

tRFM

VCRS

R

Output Signal Crossover Volt age

—

Note: 1. V = 5V ± 10%; V = 0V; T = 0 to 70°C.

CC

SS

A

2. Level guaranteed for range of V = 4.5V to 5.5V.

CC

3. With RPU, external idle resistor, 7.5κ±2%, D- to V

.

CC

4. C of 50pF(75ns) to 350pF (300ns).

L

5. Measured at crossover point of differential data signals.

6. USB specification indicates 330ns.

93/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PSD MODULE

■

The PSD Module provides configurable

Program and Data memories to the 8032 CPU

core (MCU). In addition, it has its own set of I/

O ports and a PLD with 16 macrocells for

general logic implementation.

–

Decode PLD (DPLD) that decodes address for

selection of memory blocks in the PSD

Module.

Configurable I/O ports (Port A,B,C and D) that

can be used for the following functions:

–

■

Ports A,B,C, and D are general purpose

programmable I/O ports that have a port

architecture which is different from the I/O

ports in the MCU Module.

The PSD Module communicates with the MCU

Module through the internal address, data bus

(A0-A15, D0-D7) and control signals (RD, WR,

PSEN, ALE, RESET). The user defines the

Decoding PLD in the PSDsoft Development

Tool and can map the resources in the PSD

Module to any program or data address

space. Figure 50., page 95 shows the

MCU I/Os

PLD I/Os

Latched MCU address output

Special function I/Os.

I/O ports may be configured as open-drain

outputs.

Built-in JTAG compliant serial port allows full-

chip In-System Programmability (ISP). With it,

you can program a blank device or reprogram

a device in the factory or the field.

Internal page register that can be used to

expand the 8032 MCU Module address space

by a factor of 256.

Internal programmable Power Management

Unit (PMU) that supports a low-power mode

called Power-down Mode. The PMU can

automatically detect a lack of the 8032 CPU

core activity and put the PSD Module into

Power-down Mode.

Erase/WRITE cycles:

Flash memory - 100,000 minimum

PLD - 1,000 minimum

–

functional blocks in the PSD Module.

Functional Overview

–

1 or 2 Mbit Flash memory. This is the main

Flash memory. It is divided into eight equal-

sized blocks that can be accessed with user-

specified addresses.

Secondary 256 Kbit Flash boot memory. It is

divided into four equal-sized blocks that can

be accessed with user-specified addresses.

This secondary memory brings the ability to

execute code and update the main Flash

concurrently.

–

Data Retention: 15 year minimum (for Main

Flash memory, Boot, PLD and Configuration

bits)

–

64 Kbit SRAM. The SRAM’s contents can be

protected from a power failure by connecting

an external battery.

CPLD with 16 Output Micro Cells (OMCs} and

20 Input Micro Cells (IMCs). The CPLD may

be used to efficiently implement a variety of

logic functions for internal and external

control. Examples include state machines,

loadable shift registers, and loadable

counters.

94/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 50. PSD Module Block Diagram

AI05797

95/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

In-System Programming (ISP)

Using the JTAG signals on Port C, the entire PSD

Module device can be programmed or erased

without the use of the MCU. The primary Flash

memory can also be programmed in-system by

the MCU executing the programming algorithms

out of the secondary memory, or SRAM. The sec-

ondary memory can be programmed the same

way by executing out of the primary Flash memo-

ry. The PLD or other PSD Module Configuration

blocks can be programmed through the JTAG port

or a device programmer. Table 83 indicates which

programming methods can program different func-

tional blocks of the PSD Module.

Table 83. Methods of Programming Different Functional Blocks of the PSD Module

Functional Block

Primary Flash Memory

JTAG Programming Device Programmer

IAP

Yes

No

Secondary Flash Memory

PLD Array (DPLD and CPLD)

PSD Module Configuration

No

96/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

DEVELOPMENT SYSTEM

The uPSD3200 is supported by PSDsoft, a Win-

dows-based software development tool (Win-

dows-95, Windows-98, Windows-NT). A PSD

Module design is quickly and easily produced in a

point and click environment. The designer does

not need to enter Hardware Description Language

(HDL) equations, unless desired, to define PSD

Module pin functions and memory map informa-

tion. The general design flow is shown in Figure

51. PSDsoft is available from our web site (the ad-

dress is given on the back page of this data sheet)

or other distribution channels.

PSDsoft directly supports a low cost device pro-

grammer from ST: FlashLINK (JTAG). The pro-

grammer may be purchased through your local

distributor/representative. The uPSD3200 is also

supported by third party device programmers. See

our web site for the current list.

Figure 51. PSDsoft Express Development Tool

Choose µPSD

Define µPSD Pin and

Node Functions

Point and click definition of

PSD pin functions, internal nodes,

and MCU system memory map

Define General Purpose

Logic in CPLD

C Code Generation

GENERATE C CODE

SPECIFIC TO PSD

FUNCTIONS

Point and click definition of combin-

atorial and registered logic in CPLD.

Access HDL is available if needed

Merge MCU Firmware with

PSD Module Configuration

USER'S CHOICE OF

MCU FIRMWARE

8032

A composite object file is created

containing MCU firmware and

PSD configuration

HEX OR S-RECORD

FORMAT

COMPILER/LINKER

*.OBJ FILE

PSD Programmer

*.OBJ FILE

AVAILABLE

FOR 3rd PARTY

PROGRAMMERS

FlashLINK (JTAG)

AI05798

97/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PSD MODULE REGISTER DESCRIPTION AND ADDRESS OFFSET

Table 84 shows the offset addresses to the PSD

Module registers relative to the CSIOP base ad-

dress. The CSIOP space is the 256 bytes of ad-

dress that is allocated by the user to the internal

PSD Module registers. Table 84 provides brief de-

scriptions of the registers in CSIOP space. The fol-

lowing section gives a more detailed description.

Table 84. Register Address Offset

(1)

Register Name

Data In

Port A Port B Port C Port D

Description

Other

00

02

01

03

10

11

Reads Port pin as input, MCU I/O Input Mode

Selects mode between MCU I/O or Address Out

Control

Stores data for output to Port pins, MCU I/O

Output Mode

Data Out

Direction

04

06

05

07

12

14

13

15

Configures Port pin as input or output

Configures Port pins as either CMOS or Open

Drain on some pins, while selecting high slew rate

on other pins.

Drive Select

08

09

16

17

Input Macrocell

Enable Out

0A

0C

0B

0D

18

1A

Reads Input Macrocells

Reads the status of the output enable to the I/O

Port driver

1B

Output Macrocells

AB

READ – reads output of macrocells AB

WRITE – loads macrocell flip-flops

20

21

Output Macrocells

BC

READ – reads output of macrocells BC

WRITE – loads macrocell flip-flops

21

23

Mask Macrocells AB 22

Mask Macrocells BC

22

23

Blocks writing to the Output Macrocells AB

Blocks writing to the Output Macrocells BC

Primary Flash

Protection

C0

C2

Read-only – Primary Flash Sector Protection

Secondary Flash

memory Protection

Read-only – PSD Module Security and Secondary

Flash memory Sector Protection

PMMR0

PMMR2

Page

B0

B4

E0

Power Management Register 0

Power Management Register 2

Page Register

Places PSD Module memory areas in Program

and/or Data space on an individual basis.

VM

E2

Note: 1. Other registers that are not part of the I/O ports.

98/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PSD MODULE DETAILED OPERATION

As shown in Figure 15., page 27, the PSD Module

consists of five major types of functional blocks:

Memory Block Select Signals

The DPLD generates the Select signals for all the

internal memory blocks (see PLDs, page 112).

Each of the eight sectors of the primary Flash

memory has a Select signal (FS0-FS7) which can

contain up to three product terms. Each of the four

sectors of the secondary Flash memory has a Se-

lect signal (CSBOOT0-CSBOOT3) which can con-

tain up to three product terms. Having three

product terms for each Select signal allows a given

sector to be mapped in Program or Data space.

■

Memory Block

PLD Blocks

I/O Ports

Power Management Unit (PMU)

JTAG Interface

The functions of each block are described in the

following sections. Many of the blocks perform

multiple functions, and are user configurable.

Ready/Busy (PC3). This signal can be used to

output the Ready/Busy status of the Flash memo-

ry. The output on Ready/Busy (PC3) is a '0' (Busy)

when Flash memory is being written to, or when

Flash memory is being erased. The output is a '1'

(Ready) when no WRITE or Erase cycle is in

progress.

MEMORY BLOCKS

The PSD Module has the following memory

blocks:

Memory Operation. The primary Flash memory

and secondary Flash memory are addressed

through the MCU Bus. The MCU can access these

memories in one of two ways:

■

Primary Flash memory

Secondary Flash memory

SRAM

The Memory Select signals for these blocks origi-

nate from the Decode PLD (DPLD) and are user-

defined in PSDsoft Express.

Primary Flash Memory and Secondary Flash

memory Description

The primary Flash memory is divided evenly into

eight equal sectors. The secondary Flash memory

is divided into four equal sectors. Each sector of

either memory block can be separately protected

from Program and Erase cycles.

Flash memory may be erased on a sector-by-sec-

tor basis. Flash sector erasure may be suspended

while data is read from other sectors of the block

and then resumed after reading.

–

The MCU can execute a typical bus WRITE or

READ operation.

–

The MCU can execute a specific Flash

memory instruction that consists of several

WRITE and READ operations. This involves

writing specific data patterns to special

addresses within the Flash memory to invoke

an embedded algorithm. These instructions

are summarized in Table 85., page 101.

Typically, the MCU can read Flash memory using

READ operations, just as it would read a ROM de-

vice. However, Flash memory can only be altered

using specific Erase and Program instructions. For

example, the MCU cannot write a single byte di-

rectly to Flash memory as it would write a byte to

RAM. To program a byte into Flash memory, the

MCU must execute a Program instruction, then

test the status of the Program cycle. This status

test is achieved by a READ operation or polling

Ready/Busy (PC3).

During a Program or Erase cycle in Flash memory,

the status can be output on Ready/Busy (PC3).

This pin is set up using PSDsoft Express Configu-

ration.

99/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Instructions

An instruction consists of a sequence of specific

operations. Each received byte is sequentially de-

coded by the PSD Module and not executed as a

standard WRITE operation. The instruction is exe-

cuted when the correct number of bytes are prop-

erly received and the time between two

consecutive bytes is shorter than the time-out pe-

riod. Some instructions are structured to include

READ operations after the initial WRITE opera-

tions.

The instruction must be followed exactly. Any in-

valid combination of instruction bytes or time-out

between two consecutive bytes while addressing

Flash memory resets the device logic into READ

Mode (Flash memory is read like a ROM device).

–

Read Sector Protection Status

Bypass

These instructions are detailed in Table 85. For ef-

ficient decoding of the instructions, the first two

bytes of an instruction are the coded cycles and

are followed by an instruction byte or confirmation

byte. The coded cycles consist of writing the data

AAh to address X555h during the first cycle and

data 55h to address XAAAh during the second cy-

cle. Address signals A15-A12 are Don’t Care dur-

ing the instruction WRITE cycles. However, the

appropriate

CSBOOT0-CSBOOT3) must be selected.

Sector

Select

(FS0-FS7

or

The primary and secondary Flash memories have

the same instruction set (except for Read Primary

Flash Identifier). The Sector Select signals deter-

mine which Flash memory is to receive and exe-

cute the instruction. The primary Flash memory is

selected if any one of Sector Select (FS0-FS7) is

High, and the secondary Flash memory is selected

if any one of Sector Select (CSBOOT0-

CSBOOT3) is High.

The Flash memory supports the instructions sum-

marized in Table 85:

Flash memory:

–

Erase memory by chip or sector

Suspend or resume sector erase

Program a Byte

RESET to READ Mode

100/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 85. Instructions

FS0-FS7 or

Instruction

CSBOOT0-

Cycle 1

Cycle 2 Cycle 3

Cycle 4

Cycle 5 Cycle 6 Cycle 7

CSBOOT3

“Read”

RD @ RA

(5)

1

READ

READ Sector

AAh@

X555h

55h@

XAAAh

90h@

X555h

Read status @

XX02h

(6,8,13)

Protection

Program a Flash

AAh@

X555h

55h@

XAAAh

A0h@

X555h

PD@ PA

(13)

Byte

7

Flash Sector

AAh@

X555h

55h@

XAAAh

80h@

X555h

55h@

XAAAh

30h@

SA

30h @

AAh@ X555h

(7,13)

Erase

next SA

Flash Bulk

AAh@

X555h

55h@

XAAAh

80h@

X555h

55h@

XAAAh

10h@

X555h

(13)

Erase

Suspend Sector

B0h@

XXXXh

(11)

Erase

Resume Sector

30h@

XXXXh

1

(12)

Erase

F0h@

XXXXh

(6)

RESET

AAh@

X555h

55h@

XAAAh

20h@

X555h

Unlock Bypass

A0h@

XXXXh

PD@ PA

(9)

Program

Unlock Bypass

90h@

XXXXh

00h@

XXXXh

1

(10)

Reset

Note: 1. All bus cycles are WRITE bus cycles, except the ones with the “Read” label

2. All values are in hexadecimal:

3. X = Don’t care. Addresses of the form XXXXh, in this table, must be even addresses

4. RA = Address of the memory location to be read

5. RD = Data READ from location RA during the READ cycle

6. PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of WRITE Strobe (WR, CNTL0).

7. PA is an even address for PSD in Word Programming Mode.

8. PD = Data word to be programmed at location PA. Data is latched on the rising edge of WRITE Strobe (WR, CNTL0)

9. SA = Address of the sector to be erased or verified. The Sector Select (FS0-FS7 or CSBOOT0-CSBOOT3) of the sector to be

erased, or verified, must be Active (High).

10. Sector Select (FS0-FS7 or CSBOOT0-CSBOOT3) signals are active High, and are defined in PSDsoft Express.

11. Only address Bits A11-A0 are used in instruction decoding.

12. No Unlock or instruction cycles are required when the device is in the READ Mode

13. The RESET instruction is required to return to the READ Mode after reading the Sector Protection Status, or if the Error Flag Bit

(DQ5/DQ13) goes High.

14. Additional sectors to be erased must be written at the end of the Sector Erase instruction within 80µs.

15. The data is 00h for an unprotected sector, and 01h for a protected sector. In the fourth cycle, the Sector Select is active, and

(A1,A0)=(1,0)

16. The Unlock Bypass instruction is required prior to the Unlock Bypass Program instruction.

17. The Unlock Bypass Reset Flash instruction is required to return to reading memory data when the device is in the Unlock Bypass

Mode.

18. The system may perform READ and Program cycles in non-erasing sectors, read the Flash ID or read the Sector Protection Status

when in the Suspend Sector Erase Mode. The Suspend Sector Erase instruction is valid only during a Sector Erase cycle.

19. The Resume Sector Erase instruction is valid only during the Suspend Sector Erase Mode.

20. The MCU cannot invoke these instructions while executing code from the same Flash memory as that for which the instruction is

intended. The MCU must retrieve, for example, the code from the secondary Flash memory when reading the Sector Protection

Status of the primary Flash memory.

101/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Power-down Instruction and Power-up Mode

Power-up Mode. The PSD Module internal logic

is reset upon Power-up to the READ Mode. Sector

Select (FS0-FS7 and CSBOOT0-CSBOOT3)

must be held Low, and WRITE Strobe (WR,

CNTL0) High, during Power-up for maximum se-

curity of the data contents and to remove the pos-

sibility of a byte being written on the first edge of

WRITE Strobe (WR, CNTL0). Any WRITE cycle

Reading the Erase/Program Status Bits. The

Flash memory provides several status bits to be

used by the MCU to confirm the completion of an

Erase or Program cycle of Flash memory. These

status bits minimize the time that the MCU spends

performing these tasks and are defined in Table

86., page 103. The status bits can be read as

many times as needed.

initiation is locked when V is below V

.

CC

LKO

For Flash memory, the MCU can perform a READ

operation to obtain these status bits while an

Erase or Program instruction is being executed by

the embedded algorithm. See Programming Flash

Memory, page 104, for details.

Data Polling Flag (DQ7). When erasing or pro-

gramming in Flash memory, the Data Polling Flag

Bit (DQ7) outputs the complement of the bit being

entered for programming/writing on the DQ7 Bit.

Once the Program instruction or the WRITE oper-

ation is completed, the true logic value is read on

the Data Polling Flag Bit (DQ7) (in a READ opera-

tion).

READ

Under typical conditions, the MCU may read the

primary Flash memory or the secondary Flash

memory using READ operations just as it would a

ROM or RAM device. Alternately, the MCU may

use READ operations to obtain status information

about a Program or Erase cycle that is currently in

progress. Lastly, the MCU may use instructions to

read special data from these memory blocks. The

following sections describe these READ functions.

READ Memory Contents. Primary Flash memo-

ry and secondary Flash memory are placed in the

READ Mode after Power-up, chip reset, or a

Reset Flash instruction (see Table 85., page 101).

The MCU can read the memory contents of the pri-

mary Flash memory or the secondary Flash mem-

ory by using READ operations any time the READ

operation is not part of an instruction.

–

Data Polling is effective after the fourth WRITE

pulse (for a Program instruction) or after the

sixth WRITE pulse (for an Erase instruction). It

must be performed at the address being

programmed or at an address within the Flash

memory sector being erased.

READ Memory Sector Protection Status. The

primary Flash memory Sector Protection Status is

read with an instruction composed of 4 operations:

3 specific WRITE operations and a READ opera-

tion (see Table 85., page 101). During the READ

operation, address Bits A6, A1, and A0 must be '0,'

'1,' and '0,' respectively, while Sector Select (FS0-

FS7 or CSBOOT0-CSBOOT3) designates the

Flash memory sector whose protection has to be

verified. The READ operation produces 01h if the

Flash memory sector is protected, or 00h if the

sector is not protected.

The sector protection status for all NVM blocks

(primary Flash memory or secondary Flash mem-

ory) can also be read by the MCU accessing the

Flash Protection registers in PSD I/O space. See

Flash Memory Sector Protect, page 107, for regis-

ter definitions.

–

During an Erase cycle, the Data Polling Flag

Bit (DQ7) outputs a '0.' After completion of the

cycle, the Data Polling Flag Bit (DQ7) outputs

the last bit programmed (it is a '1' after

erasing).

If the byte to be programmed is in a protected

Flash memory sector, the instruction is

ignored.

If all the Flash memory sectors to be erased

are protected, the Data Polling Flag Bit (DQ7)

is reset to '0' for about 100µs, and then returns

to the previous addressed byte. No erasure is

performed.

–

102/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Toggle Flag (DQ6). The Flash memory offers an-

bit is set to '1' when there is a failure during Flash

memory Byte Program, Sector Erase, or Bulk

Erase cycle.

In the case of Flash memory programming, the Er-

ror Flag Bit (DQ5) indicates the attempt to program

a Flash memory bit from the programmed state,

'0', to the erased state, '1,' which is not valid. The

Error Flag Bit (DQ5) may also indicate a Time-out

condition while attempting to program a byte.

In case of an error in a Flash memory Sector Erase

or Byte Program cycle, the Flash memory sector in

which the error occurred or to which the pro-

grammed byte belongs must no longer be used.

Other Flash memory sectors may still be used.

The Error Flag Bit (DQ5) is reset after a Reset

Flash instruction.

Erase Time-out Flag (DQ3). The Erase Time-

out Flag Bit (DQ3) reflects the time-out period al-

lowed between two consecutive Sector Erase in-

structions. The Erase Time-out Flag Bit (DQ3) is

reset to '0' after a Sector Erase cycle for a time pe-

riod of 100µs + 20% unless an additional Sector

Erase instruction is decoded. After this time peri-

od, or when the additional Sector Erase instruction

is decoded, the Erase Time-out Flag Bit (DQ3) is

set to '1.'

other way for determining when the Program cycle

is completed. During the internal WRITE operation

and when either the FS0-FS7 or CSBOOT0-

CSBOOT3 is true, the Toggle Flag Bit (DQ6) tog-

gles from '0' to '1' and '1' to '0' on subsequent at-

tempts to read any byte of the memory.

When the internal cycle is complete, the toggling

stops and the data READ on the Data Bus D0-D7

is the addressed memory byte. The device is now

accessible for a new READ or WRITE operation.

The cycle is finished when two successive Reads

yield the same output data.

–

The Toggle Flag Bit (DQ6) is effective after the

fourth WRITE pulse (for a Program instruction)

or after the sixth WRITE pulse (for an Erase

instruction).

–

If the byte to be programmed belongs to a

protected Flash memory sector, the

instruction is ignored.

If all the Flash memory sectors selected for

erasure are protected, the Toggle Flag Bit

(DQ6) toggles to '0' for about 100µs and then

returns to the previous addressed byte.

Error Flag (DQ5). During a normal Program or

Erase cycle, the Error Flag Bit (DQ5) is to '0.' This

Table 86. Status Bit

FS0-FS7/

(2)

(1,2)

(2)

(1,2)

Functional Block

CSBOOT0-

CSBOOT3

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

Erase

Time-

out

Data

Polling

Toggle Error

Flag Flag

(3)

Flash Memory

X

V

IH

Note: 1. X = Not guaranteed value, can be read either '1' or '0.'

2. DQ7-DQ0 represent the Data Bus bits, D7-D0.

3. FS0-FS7 and CSBOOT0-CSBOOT3 are active High.

103/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Programming Flash Memory

Flash memory must be erased prior to being pro-

grammed. A byte of Flash memory is erased to all

'1s' (FFh), and is programmed by setting selected

bits to '0.' The MCU may erase Flash memory all

at once or by-sector, but not byte-by-byte. Howev-

er, the MCU may program Flash memory byte-by-

byte.

The primary and secondary Flash memories re-

quire the MCU to send an instruction to program a

byte or to erase sectors (see Table 85., page 101).

Once the MCU issues a Flash memory Program or

Erase instruction, it must check for the status bits

for completion. The embedded algorithms that are

invoked support several means to provide status

to the MCU. Status may be checked using any of

three methods: Data Polling, Data Toggle, or

Ready/Busy (PC3).

byte that was written to the Flash memory with the

byte that was intended to be written.

When using the Data Polling method during an

Erase cycle, Figure 52 still applies. However, the

Data Polling Flag Bit (DQ7) is '0' until the Erase cy-

cle is complete. A '1' on the Error Flag Bit (DQ5) in-

dicates a time-out condition on the Erase cycle; a

'0' indicates no error. The MCU can read any loca-

tion within the sector being erased to get the Data

Polling Flag Bit (DQ7) and the Error Flag Bit

(DQ5).

PSDsoft Express generates ANSI C code func-

tions which implement these Data Polling algo-

rithms.

Figure 52. Data Polling Flowchart

Data Polling. Polling on the Data Polling Flag Bit

(DQ7) is a method of checking whether a Program

or Erase cycle is in progress or has completed.

Figure 52 shows the Data Polling algorithm.

START

READ DQ5 & DQ7

at VALID ADDRESS

When the MCU issues a Program instruction, the

embedded algorithm begins. The MCU then reads

the location of the byte to be programmed in Flash

memory to check status. The Data Polling Flag Bit

(DQ7) of this location becomes the complement of

b7 of the original data byte to be programmed. The

MCU continues to poll this location, comparing the

Data Polling Flag Bit (DQ7) and monitoring the Er-

ror Flag Bit (DQ5). When the Data Polling Flag Bit

(DQ7) matches b7 of the original data, and the Er-

ror Flag Bit (DQ5) remains '0,' the embedded algo-

rithm is complete. If the Error Flag Bit (DQ5) is '1,'

the MCU should test the Data Polling Flag Bit

(DQ7) again since the Data Polling Flag Bit (DQ7)

may have changed simultaneously with the Error

Flag Bit (DQ5) (see Figure 52).

DQ7

=

YES

DATA

NO

DQ5

= 1

YES

READ DQ7

DQ7

=

DATA

YES

The Error Flag Bit (DQ5) is set if either an internal

time-out occurred while the embedded algorithm

attempted to program the byte or if the MCU at-

tempted to program a '1' to a bit that was not

erased (not erased is logic '0').

NO

FAIL

PASS

It is suggested (as with all Flash memories) to read

the location again after the embedded program-

ming algorithm has completed, to compare the

AI01369B

104/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Data Toggle. Checking the Toggle Flag Bit

cates no error. The MCU can read any location

within the sector being erased to get the Toggle

Flag Bit (DQ6) and the Error Flag Bit (DQ5).

PSDsoft Express generates ANSI C code func-

tions which implement these Data Toggling algo-

rithms.

(DQ6) is a method of determining whether a Pro-

gram or Erase cycle is in progress or has complet-

ed. Figure 53 shows the Data Toggle algorithm.

When the MCU issues a Program instruction, the

embedded algorithm begins. The MCU then reads

the location of the byte to be programmed in Flash

memory to check status. The Toggle Flag Bit

(DQ6) of this location toggles each time the MCU

reads this location until the embedded algorithm is

complete. The MCU continues to read this loca-

tion, checking the Toggle Flag Bit (DQ6) and mon-

itoring the Error Flag Bit (DQ5). When the Toggle

Flag Bit (DQ6) stops toggling (two consecutive

reads yield the same value), and the Error Flag Bit

(DQ5) remains '0,' the embedded algorithm is

complete. If the Error Flag Bit (DQ5) is '1,' the

MCU should test the Toggle Flag Bit (DQ6) again,

since the Toggle Flag Bit (DQ6) may have

changed simultaneously with the Error Flag Bit

(DQ5) (see Figure 53).

Figure 53. Data Toggle Flowchart

START

READ

DQ5 & DQ6

DQ6

NO

=

TOGGLE

YES

The Error Flag Bit(DQ5) is set if either an internal

time-out occurred while the embedded algorithm

attempted to program the byte, or if the MCU at-

tempted to program a '1' to a bit that was not

erased (not erased is logic '0').

NO

DQ5

= 1

YES

READ DQ6

It is suggested (as with all Flash memories) to read

the location again after the embedded program-

ming algorithm has completed, to compare the

byte that was written to Flash memory with the

byte that was intended to be written.

When using the Data Toggle method after an

Erase cycle, Figure 53 still applies. the Toggle

Flag Bit (DQ6) toggles until the Erase cycle is

complete. A 1 on the Error Flag Bit (DQ5) indicates

a time-out condition on the Erase cycle; a '0' indi-

DQ6

=

NO

TOGGLE

YES

FAIL

PASS

AI01370B

105/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Unlock Bypass. The Unlock Bypass instructions

allow the system to program bytes to the Flash

memories faster than using the standard Program

instruction. The Unlock Bypass Mode is entered

by first initiating two Unlock cycles. This is followed

by a third WRITE cycle containing the Unlock By-

pass code, 20h (as shown in Table 85., page 101).

imum number of Erase cycles have been

executed).

It is not necessary to program the memory with

00h because the PSD Module automatically does

this before erasing to 0FFh.

During execution of the Bulk Erase instruction, the

Flash memory does not accept any instructions.

The Flash memory then enters the Unlock Bypass

Mode. A two-cycle Unlock Bypass Program in-

struction is all that is required to program in this

mode. The first cycle in this instruction contains

the Unlock Bypass Program code, A0h. The sec-

ond cycle contains the program address and data.

Additional data is programmed in the same man-

ner. These instructions dispense with the initial

two Unlock cycles required in the standard Pro-

gram instruction, resulting in faster total Flash

memory programming.

During the Unlock Bypass Mode, only the Unlock

Bypass Program and Unlock Bypass Reset Flash

instructions are valid.

To exit the Unlock Bypass Mode, the system must

issue the two-cycle Unlock Bypass Reset Flash in-

struction. The first cycle must contain the data

90h; the second cycle the data 00h. Addresses are

Don’t Care for both cycles. The Flash memory

then returns to READ Mode.

Flash Sector Erase. The Sector Erase instruc-

tion uses six WRITE operations, as described in

Table 85., page 101. Additional Flash Sector

Erase codes and Flash memory sector addresses

can be written subsequently to erase other Flash

memory sectors in parallel, without further coded

cycles, if the additional bytes are transmitted in a

shorter time than the time-out period of about

100µs. The input of a new Sector Erase code re-

starts the time-out period.

The status of the internal timer can be monitored

through the level of the Erase Time-out Flag Bit

(DQ3). If the Erase Time-out Flag Bit (DQ3) is '0,'

the Sector Erase instruction has been received

and the time-out period is counting. If the Erase

Time-out Flag Bit (DQ3) is '1,' the time-out period

has expired and the embedded algorithm is busy

erasing the Flash memory sector(s). Before and

during Erase time-out, any instruction other than

Suspend Sector Erase and Resume Sector Erase

instructions abort the cycle that is currently in

progress, and reset the device to READ Mode.

During a Sector Erase, the memory status may be

checked by reading the Error Flag Bit (DQ5), the

Toggle Flag Bit (DQ6), and the Data Polling Flag

Bit (DQ7), as detailed in Programming Flash

Memory, page 104.

During execution of the Erase cycle, the Flash

memory accepts only RESET and Suspend Sec-

tor Erase instructions. Erasure of one Flash mem-

ory sector may be suspended, in order to read

data from another Flash memory sector, and then

resumed.

Erasing Flash Memory

Flash Bulk Erase. The Flash Bulk Erase instruc-

tion uses six WRITE operations followed by a

READ operation of the status register, as de-

scribed in Table 85. If any byte of the Bulk Erase

instruction is wrong, the Bulk Erase instruction

aborts and the device is reset to the READ Flash

memory status.

During a Bulk Erase, the memory status may be

checked by reading the Error Flag Bit (DQ5), the

Toggle Flag Bit (DQ6), and the Data Polling Flag

Bit (DQ7), as detailed in Programming Flash

Memory, page 104. The Error Flag Bit (DQ5) re-

turns a '1' if there has been an Erase Failure (max-

106/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Suspend Sector Erase. When a Sector Erase

cycle is in progress, the Suspend Sector Erase in-

struction can be used to suspend the cycle by writ-

ing 0B0h to any address when an appropriate

Sector Select (FS0-FS7 or CSBOOT0-CSBOOT3)

is High. (See Table 85., page 101). This allows

reading of data from another Flash memory sector

after the Erase cycle has been suspended. Sus-

pend Sector Erase is accepted only during an

Erase cycle and defaults to READ Mode. A Sus-

pend Sector Erase instruction executed during an

Erase time-out period, in addition to suspending

the Erase cycle, terminates the time out period.

Resume Sector Erase. If

a

Suspend Sector

Erase instruction was previously executed, the

erase cycle may be resumed with this instruction.

The Resume Sector Erase instruction consists of

writing 030h to any address while an appropriate

Sector Select (FS0-FS7 or CSBOOT0-CSBOOT3)

is High. (See Table 85., page 101.)

Specific Features

Flash Memory Sector Protect. Each

primary

and secondary Flash memory sector can be sepa-

rately protected against Program and Erase cy-

cles. Sector Protection provides additional data

security because it disables all Program or Erase

cycles. This mode can be activated through the

JTAG Port or a Device Programmer.

Sector protection can be selected for each sector

using the PSDsoft Express Configuration pro-

gram. This automatically protects selected sectors

when the device is programmed through the JTAG

Port or a Device Programmer. Flash memory sec-

tors can be unprotected to allow updating of their

contents using the JTAG Port or a Device Pro-

grammer. The MCU can read (but cannot change)

the sector protection bits.

Any attempt to program or erase a protected Flash

memory sector is ignored by the device. The Verify

operation results in a READ of the protected data.

This allows a guarantee of the retention of the Pro-

tection status.

The sector protection status can be read by the

MCU through the Flash memory protection regis-

ters (in the CSIOP block). See Tables 87 and 88.

The Toggle Flag Bit (DQ6) stops toggling when the

internal logic is suspended. The status of this bit

must be monitored at an address within the Flash

memory sector being erased. The Toggle Flag Bit

(DQ6) stops toggling between 0.1µs and 15µs af-

ter the Suspend Sector Erase instruction has been

executed. The Flash memory is then automatically

set to READ Mode.

If an Suspend Sector Erase instruction was exe-

cuted, the following rules apply:

–

Attempting to read from a Flash memory

sector that was being erased outputs invalid

data.

–

Reading from a Flash sector that was not

being erased is valid.

The Flash memory cannot be programmed,

and only responds to Resume Sector Erase

and Reset Flash instructions (READ is an

operation and is allowed).

–

If a Reset Flash instruction is received, data in

the Flash memory sector that was being

erased is invalid.

Table 87. Sector Protection/Security Bit Definition – Flash Protection Register

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Sec7_Prot

Sec6_Prot

Sec5_Prot

Sec4_Prot

Sec3_Prot

Sec2_Prot

Sec1_Prot

Sec0_Prot

Note: 1. Bit Definitions:

Sec_Prot 1 = Primary Flash memory or secondary Flash memory Sector is write-protected.

Sec_Prot 0 = Primary Flash memory or secondary Flash memory Sector is not write-protected.

Table 88. Sector Protection/Security Bit Definition – Secondary Flash Protection Register

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Security_Bit not used

Note: 1. Bit Definitions:

not used

Sec3_Prot

Sec2_Prot

Sec1_Prot

Sec0_Prot

Sec_Prot 1 = Secondary Flash memory Sector is write-protected.

Sec_Prot 0 = Secondary Flash memory Sector is not write-protected.

Security_Bit 0 = Security Bit in device has not been set; 1 = Security Bit in device has been set.

107/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Reset Flash. The Reset Flash instruction con-

sists of one WRITE cycle (see Table

85., page 101). It can also be optionally preceded

by the standard two WRITE decoding cycles (writ-

ing AAh to 555h and 55h to AAAh). It must be ex-

ecuted after:

to Voltage Stand-by (V

, PC2). If you have an

STBY

external battery connected to the uPSD3200, the

contents of the SRAM are retained in the event of

a power loss. The contents of the SRAM are re-

tained so long as the battery voltage remains at 2V

or greater. If the supply voltage falls below the bat-

tery voltage, an internal power switch-over to the

battery occurs.

–

Reading the Flash Protection Status or Flash

ID

PC4 can be configured as an output that indicates

when power is being drawn from the external bat-

–

An Error condition has occurred (and the

device has set the Error Flag Bit (DQ5) to '1'

during a Flash memory Program or Erase

cycle.

tery. Battery-on Indicator (V

, PC4) is High

BATON

with the supply voltage falls below the battery volt-

age and the battery on Voltage Stand-by (V

,

STBY

The Reset Flash instruction puts the Flash memo-

ry back into normal READ Mode. If an Error condi-

tion has occurred (and the device has set the Error

Flag Bit (DQ5) to '1' the Flash memory is put back

into normal READ Mode within 25µs of the Reset

Flash instruction having been issued. The Reset

Flash instruction is ignored when it is issued dur-

ing a Program or Bulk Erase cycle of the Flash

memory. The Reset Flash instruction aborts any

on-going Sector Erase cycle, and returns the

Flash memory to the normal READ Mode within

25µs.

PC2) is supplying power to the internal SRAM.

SRAM Select (RS0), Voltage Stand-by (V

,

STBY

PC2) and Battery-on Indicator (V

, PC4) are

BATON

all configured using PSDsoft Express Configura-

tion.

Sector Select and SRAM Select

Sector Select (FS0-FS7, CSBOOT0-CSBOOT3)

and SRAM Select (RS0) are all outputs of the

DPLD. They are setup by writing equations for

them in PSDsoft Express. The following rules ap-

ply to the equations for these signals:

Reset (RESET) Signal. A pulse on Reset (RE-

SET) aborts any cycle that is in progress, and re-

sets the Flash memory to the READ Mode. When

the reset occurs during a Program or Erase cycle,

the Flash memory takes up to 25µs to return to the

READ Mode. It is recommended that the Reset

(RESET) pulse (except for Power-on RESET, as

described in RESET TIMING AND DEVICE STA-

TUS AT RESET, page 132) be at least 25µs so

that the Flash memory is always ready for the

MCU to retreive the bootstrap instructions after the

reset cycle is complete.

1. Primary Flash memory and secondary Flash

memory Sector Select signals must not be

larger than the physical sector size.

2. Any primary Flash memory sector must not be

mapped in the same memory space as

another Flash memory sector.

3. A secondary Flash memory sector must notbe

mapped in the same memory space as

another secondary Flash memory sector.

4. SRAM, I/O, and Peripheral I/O spaces must

not overlap.

SRAM

5. A secondary Flash memory sector may

overlap a primary Flash memory sector. In

case of overlap, priority is given to the

secondary Flash memory sector.

6. SRAM, I/O, and Peripheral I/O spaces may

overlap any other memory sector. Priority is

given to the SRAM, I/O, or Peripheral I/O.

The SRAM is enabled when SRAM Select (RS0)

from the DPLD is High. SRAM Select (RS0) can

contain up to two product terms, allowing flexible

memory mapping.

The SRAM can be backed up using an external

battery. The external battery should be connected

108/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Example. FS0 is valid when the address is in the

For example, you may wish to have SRAM and pri-

mary Flash memory in the Data space at Boot-up,

and secondary Flash memory in the Program

space at Boot-up, and later swap the primary and

secondary Flash memories. This is easily done

with the VM Register by using PSDsoft Express

Configuration to configure it for Boot-up and hav-

ing the MCU change it when desired. Table 89 de-

scribes the VM Register.

range of 8000h to BFFFh, CSBOOT0 is valid from

8000h to 9FFFh, and RS0 is valid from 8000h to

87FFh. Any address in the range of RS0 always

accesses the SRAM. Any address in the range of

CSBOOT0 greater than 87FFh (and less than

9FFFh) automatically addresses secondary Flash

memory segment 0. Any address greater than

9FFFh accesses the primary Flash memory seg-

ment 0. You can see that half of the primary Flash

memory segment 0 and one-fourth of secondary

Flash memory segment 0 cannot be accessed in

this example.

Figure 54. Priority Level of Memory and I/O

Components in the PSD Module

Note: An equation that defined FS1 to anywhere

Highest Priority

in the range of 8000h to BFFFh would not be valid.

Figure 54 shows the priority levels for all memory

components. Any component on a higher level can

overlap and has priority over any component on a

lower level. Components on the same level must

not overlap. Level one has the highest priority and

level 3 has the lowest.

Level 1

SRAM, I/O, or

Peripheral I/O

Level 2

Secondary

Non-Volatile Memory

Memory Select Configuration in Program and

Data Spaces. The MCU Core has separate ad-

dress spaces for Program memory and Data

memory. Any of the memories within the PSD

Module can reside in either space or both spaces.

This is controlled through manipulation of the VM

Register that resides in the CSIOP space.

Level 3

Primary Flash Memory

Lowest Priority

AI02867D

The VM Register is set using PSDsoft Express to

have an initial value. It can subsequently be

changed by the MCU so that memory mapping

can be changed on-the-fly.

Table 89. VM Register

Bit 4

Bit 2

Primary

FL_Code

Bit 7

Bit 3

Secondary Data

Bit 1

Bit 0

Bit 6

Bit 5

Primary

FL_Data

PIO_EN

Secondary Code SRAM_Code

0 = RD

can’t

0 = PSEN

can’t

access Secondary access

0 = PSEN

0 = PSEN can’t

can’t

0 = RD can’t

0 = disable

PIO Mode

not used not used access

access Secondary

access

Flash

memory

Flash memory

Flash

memory

Flash memory

SRAM

1 = RD

1 = PSEN

access

Flash

1 = RD access

Secondary Flash

memory

1 = PSEN access 1 = PSEN

1= enable

PIO Mode

access

not used not used

Flash

Secondary Flash

memory

access

SRAM

memory

109/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Separate Space Mode. Program space is sepa-

rated from Data space. For example, Program Se-

lect Enable (PSEN) is used to access the program

code from the primary Flash memory, while READ

Strobe (RD) is used to access data from the sec-

ondary Flash memory, SRAM and I/O Port blocks.

This configuration requires the VM Register to be

set to 0Ch (see Figure 55).

Combined Space Modes. The Program and

Data spaces are combined into one memory

space that allows the primary Flash memory, sec-

ondary Flash memory, and SRAM to be accessed

by either Program Select Enable (PSEN) or READ

Strobe (RD). For example, to configure the prima-

ry Flash memory in Combined space, Bits b2 and

b4 of the VM Register are set to '1' (see Figure 56).

Figure 55. Separate Space Mode

Primary

Flash

Secondary

Flash

SRAM

DPLD

RS0

Memory

CSBOOT0-3

FS0-FS7

CS

OE

CS

OE

PSEN

RD

AI02869C

Figure 56. Combined Space Mode

Primary

Flash

Secondary

Flash

SRAM

DPLD

RS0

Memory

RD

CSBOOT0-3

FS0-FS7

CS

OE

CS

OE

VM REG BIT 3

VM REG BIT 4

PSEN

VM REG BIT 1

RD

VM REG BIT 2

VM REG BIT 0

AI02870C

110/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Page Register

The 8-bit Page Register increases the addressing

capability of the MCU Core by a factor of up to 256.

The contents of the register can also be read by

the MCU. The outputs of the Page Register

(PGR0-PGR7) are inputs to the DPLD decoder

and can be included in the Sector Select (FS0-

FS7, CSBOOT0-CSBOOT3), and SRAM Select

(RS0) equations.

If memory paging is not needed, or if not all 8 page

register bits are needed for memory paging, then

these bits may be used in the CPLD for general

logic.

Figure 57 shows the Page Register. The eight flip-

flops in the register are connected to the internal

data bus D0-D7. The MCU can write to or read

from the Page Register. The Page Register can be

accessed at address location CSIOP + E0h.

Figure 57. Page Register

RESET

PGR0

INTERNAL PSD MODULE

SELECTS

AND LOGIC

D0

D1

D2

D3

D4

D5

D6

D7

Q0

PGR1

Q1

Q2

Q3

Q4

Q5

Q6

Q7

PGR2

D0 - D7

DPLD

AND

CPLD

PGR3

PGR4

PGR5

PGR6

PGR7

R/W

PAGE

REGISTER

PLD

AI05799

111/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PLDS

The PLDs bring programmable logic functionality

to the uPSD. After specifying the logic for the

PLDs in PSDsoft Express, the logic is pro-

grammed into the device and available upon Pow-

er-up.

The PSD Module contains two PLDs: the Decode

PLD (DPLD), and the Complex PLD (CPLD). The

PLDs are briefly discussed in the next few para-

graphs, and in more detail in Decode PLD

(DPLD), page 114,

and

Complex

PLD

(CPLD), page 115. Figure 58., page 113 shows

the configuration of the PLDs.

The DPLD performs address decoding for Select

signals for PSD Module components, such as

memory, registers, and I/O ports.

Table 90. DPLD and CPLD Inputs

Number

Input Source

Input Name

of

Signals

The CPLD can be used for logic functions, such as

loadable counters and shift registers, state ma-

chines, and encoding and decoding logic. These

logic functions can be constructed using the Out-

put Macrocells (OMC), Input Macrocells (IMC),

and the AND Array. The CPLD can also be used

to generate External Chip Select (ECS1-ECS2)

signals.

MCU Address Bus

A15-A0

16

4

PSEN, RD, WR,

ALE

MCU Control Signals

RESET

RST

PDN

1

Power-down

Port A Input

The AND Array is used to form product terms.

These product terms are specified using PSDsoft.

The PLD input signals consist of internal MCU sig-

nals and external inputs from the I/O ports. The in-

put signals are shown in Table 90.

PA7-PA0

8

4

(1)

Macrocells

Port B Input

Macrocells

PB7-PB0

PC2-4, PC7

Port C Input

Macrocells

The Turbo Bit in PSD Module

The PLDs can minimize power consumption by

switching off when inputs remain unchanged for

an extended time of about 70ns. Resetting the

Turbo Bit to '0' (Bit 3 of PMMR0) automatically

places the PLDs into standby if no inputs are

changing. Turning the Turbo Mode off increases

propagation delays while reducing power con-

sumption.

See POWER MANAGEMENT, page 128, on how

to set the Turbo Bit.

Additionally, five bits are available in PMMR2 to

block MCU control signals from entering the PLDs.

This reduces power consumption and can be used

only when these MCU control signals are not used

in PLD logic equations.

Port D Inputs

Page Register

PD2-PD1

2

8

PGR7-PGR0

Macrocell AB

Feedback

MCELLAB.FB7-

FB0

8

1

Macrocell BC

Feedback

MCELLBC.FB7-

FB0

Flash memory

Program Status Bit

Ready/Busy

Note: 1. These inputs are not available in the 52-pin package.

Each of the two PLDs has unique characteristics

suited for its applications. They are described in

the following sections.

112/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 58. PLD Diagram

8

PAGE

DATA

REGISTER

BUS

DECODE PLD

8

73

PRIMARY FLASH MEMORY SELECTS

4

SECONDARY NON-VOLATILE MEMORY SELECTS

1

SRAM SELECT

1

CSIOP SELECT

2

PERIPHERAL SELECTS

OUTPUT MACROCELL FEEDBACK

CPLD

DIRECT MACROCELL ACCESS FROM MCU DATA BUS

16

MCELLAB

1

16 OUTPUT

MACROCELL

TO PORT A OR B

8

MACROCELL

ALLOC.

PT

ALLOC.

73

MCELLBC

TO PORT B OR C

8

2

20 INPUT MACROCELL

(PORT A,B,C)

EXTERNAL CHIP SELECTS

TO PORT D

DIRECT MACROCELL INPUT TO MCU DATA BUS

INPUT MACROCELL & INPUT PORTS

PORT D INPUTS

20

2

AI06600

Note: 1. Ports A is not available in the 52-pin package

113/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Decode PLD (DPLD)

The DPLD, shown in Figure 59, is used for decod-

ing the address for PSD Module and external com-

ponents. The DPLD can be used to generate the

following decode signals:

–

4 Sector Select (CSBOOT0-CSBOOT3)

signals for the secondary Flash memory (three

product terms each)

1 internal SRAM Select (RS0) signal (two

product terms)

1 internal CSIOP Select signal (selects the

PSD Module registers)

2 internal Peripheral Select signals

(Peripheral I/O Mode).

–

8 Sector Select (FS0-FS7) signals for the

primary Flash memory (three product terms

each)

Figure 59. DPLD Logic Array

CSBOOT 0

CSBOOT 1

CSBOOT 2

CSBOOT 3

3

(INPUTS)

3

FS0

1

I/O PORTS (PORT A,B,C)

(20)

FS1

FS2

(8)

MCELLAB.FB [7:0] (FEEDBACKS)

MCELLBC.FB [7:0] (FEEDBACKS)

(8)

8 PRIMARY FLASH

MEMORY SECTOR

SELECTS

FS3

FS4

FS5

PGR0 -PGR7

2

(16)

(2)

[

]

A 15:0

[

]

PD 2:1

PDN (APD OUTPUT)

FS6

FS7

(1)

(4)

(1)

2

PSEN, RD, WR, ALE

2

RESET

RS0

2

1

SRAM SELECT

RD_BSY

CSIOP

PSEL0

PSEL1

I/O DECODER

SELECT

1

PERIPHERAL I/O

MODE SELECT

AI06601

Note: 1. Port A inputs are not available in the 52-pin package

2. Inputs from the MCU module

114/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Complex PLD (CPLD)

The CPLD can be used to implement system logic

functions, such as loadable counters and shift reg-

isters, system mailboxes, handshaking protocols,

state machines, and random logic. The CPLD can

also be used to generate External Chip Select

(ECS1-ECS2), routed to Port D.

Although External Chip Select (ECS1-ECS2) can

be produced by any Output Macrocell (OMC),

these External Chip Select (ECS1-ECS2) on Port

D do not consume any Output Macrocells (OMC).

–

AND Array capable of generating up to 137

product terms

Four I/O Ports.

Each of the blocks are described in the sections

that follow.

The Input Macrocells (IMC) and Output Macrocells

(OMC) are connected to the PSD Module internal

data bus and can be directly accessed by the

MCU. This enables the MCU software to load data

into the Output Macrocells (OMC) or read data

from both the Input and Output Macrocells (IMC

and OMC).

As shown in Figure 58, the CPLD has the following

blocks:

–

20 Input Macrocells (IMC)

16 Output Macrocells (OMC)

Macrocell Allocator

This feature allows efficient implementation of sys-

tem logic and eliminates the need to connect the

data bus to the AND Array as required in most

standard PLD macrocell architectures.

Product Term Allocator

Figure 60. Macrocell and I/O Port

PRODUCT TERMS

FROM OTHER

MACROCELLS

MCU ADDRESS / DATA BUS

TO OTHER I/O PORTS

CPLD MACROCELLS

I/O PORTS

DATA

LOAD

CONTROL

LATCHED

ADDRESS OUT

PT PRESET

MCU DATA IN

MCU LOAD

PRODUCT TERM

ALLOCATOR

I/O PIN

DATA

D

Q

MUX

WR

UP TO 10

PRODUCT TERMS

MACROCELL

OUT TO

MCU

CPLD OUTPUT

POLARITY

SELECT

PR DI LD

D/T

SELECT

Q

PT

CPLD

OUTPUT

PDR

CLOCK

INPUT

D/T/JK FF

SELECT

COMB.

/REG

SELECT

GLOBAL

CLOCK

MACROCELL

CK

TO

I/O PORT

ALLOC.

CL

CLOCK

SELECT

Q

DIR

REG.

D

WR

PT CLEAR

(

)

PT OUTPUT ENABLE OE

MACROCELL FEEDBACK

I/O PORT INPUT

INPUT MACROCELLS

Q

D

PT INPUT LATCH GATE/CLOCK

D

G

ALE

AI06602

115/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Output Macrocell (OMC)

Eight of the Output Macrocells (OMC) are con-

nected to Ports A and B pins and are named as

McellAB0-McellAB7. The other eight macrocells

are connected to Ports B and C pins and are

named as McellBC0-McellBC7. If an McellAB out-

put is not assigned to a specific pin in PSDsoft, the

Macrocell Allocator block assigns it to either Port A

or B. The same is true for a McellBC output on Port

B or C. Table 91 shows the macrocells and port

assignment.

The Output Macrocell (OMC) architecture is

shown in Figure 61., page 117. As shown in the

figure, there are native product terms available

from the AND Array, and borrowed product terms

available (if unused) from other Output Macrocells

(OMC). The polarity of the product term is con-

trolled by the XOR gate. The Output Macrocell

(OMC) can implement either sequential logic, us-

ing the flip-flop element, or combinatorial logic.

The multiplexer selects between the sequential or

combinatorial logic outputs. The multiplexer output

can drive a port pin and has a feedback path to the

AND Array inputs.

The flip-flop in the Output Macrocell (OMC) block

can be configured as a D, T, JK, or SR type in PS-

Dsoft. The flip-flop’s clock, preset, and clear inputs

may be driven from a product term of the AND Ar-

ray. Alternatively, CLKIN (PD1) can be used for

the clock input to the flip-flop. The flip-flop is

clocked on the rising edge of CLKIN (PD1). The

preset and clear are active High inputs. Each clear

input can use up to two product terms.

Table 91. Output Macrocell Port and Data Bit Assignments

Port

Output

Macrocell

Maximum Borrowed

Product Terms

Data Bit for Loading or

Reading

Native Product Terms

(1,2)

Assignment

McellAB0

McellAB1

McellAB2

McellAB3

McellAB4

McellAB5

McellAB6

McellAB7

McellBC0

McellBC1

McellBC2

McellBC3

McellBC4

McellBC5

McellBC6

McellBC7

Port A0, B0

Port A1, B1

Port A2, B2

Port A3, B3

Port A4, B4

Port A5, B5

Port A6, B6

Port A7, B7

Port B0

3

4

6

5

6

D0

D1

D2

D3

D4

D5

D6

D7

D0

D1

D2

D3

D4

D5

D6

D7

Port B1

Port B2, C2

Port B3, C3

Port B4, C4

Port B5

Port B6

Port B7, C7

Note: 1. McellAB0-McellAB7 can only be assigned to Port B in the 52-pin package.

2. Port PC0, PC1, PC5, and PC6 are assigned to JTAG pins and are not available as Macrocell outputs.

116/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Product Term Allocator

The CPLD has a Product Term Allocator. PSDsoft

uses the Product Term Allocator to borrow and

place product terms from one macrocell to anoth-

er. The following list summarizes how product

terms are allocated:

This is called product term expansion. PSDsoft

Express performs this expansion as needed.

Loading and Reading the Output Macrocells

(OMC). The Output Macrocells (OMC) block oc-

cupies a memory location in the MCU address

space, as defined by the CSIOP block (see the

–

McellAB0-McellAB7 all have three native

product terms and may borrow up to six more

McellBC0-McellBC3 all have four native

product terms and may borrow up to five more

McellBC4-McellBC7 all have four native

product terms and may borrow up to six more.

section

entitled

I/O

PORTS

(PSD

MODULE), page 119). The flip-flops in each of the

16 Output Macrocells (OMC) can be loaded from

the data bus by a MCU. Loading the Output Mac-

rocells (OMC) with data from the MCU takes prior-

ity over internal functions. As such, the preset,

clear, and clock inputs to the flip-flop can be over-

ridden by the MCU. The ability to load the flip-flops

and read them back is useful in such applications

as loadable counters and shift registers, mailbox-

es, and handshaking protocols.

Each macrocell may only borrow product terms

from certain other macrocells. Product terms al-

ready in use by one macrocell are not available for

another macrocell.

If an equation requires more product terms than

are available to it, then “external” product terms

are required, which consume other Output Macro-

cells (OMC). If external product terms are used,

extra delay is added for the equation that required

the extra product terms.

Data can be loaded to the Output Macrocells

(OMC) on the trailing edge of WRITE Strobe (WR,

edge loading) or during the time that WRITE

Strobe (WR) is active (level loading). The method

of loading is specified in PSDsoft Express Config-

uration.

Figure 61. CPLD Output Macrocell

MASK

REG.

MACROCELL CS

RD

MCU DATA BUS

[

]

D 7:0

WR

PT

ALLOCATOR

DIRECTION

REGISTER

(

)

ENABLE .OE

(

)

PRESET .PR

COMB/REG

SELECT

PT

DIN PR

LD

MUX

I/O PIN

MACROCELL

ALLOCATOR

Q

PT

POLARITY

SELECT

IN

CLR

PROGRAMMABLE

PORT

DRIVER

(

)

CLEAR .RE

(

)

FF D/T/JK/SR

PT CLK

CLKIN

MUX

(

)

FEEDBACK .FB

PORT INPUT

INPUT

MACROCELL

AI06617

117/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

The OMC Mask Register. There is one Mask

Register for each of the two groups of eight Output

Macrocells (OMC). The Mask Registers can be

used to block the loading of data to individual Out-

put Macrocells (OMC). The default value for the

Mask Registers is 00h, which allows loading of the

Output Macrocells (OMC). When a given bit in a

Mask Register is set to a '1,' the MCU is blocked

from writing to the associated Output Macrocells

(OMC). For example, suppose McellAB0-

McellAB3 are being used for a state machine. You

would not want a MCU write to McellAB to over-

write the state machine registers. Therefore, you

would want to load the Mask Register for McellAB

(Mask Macrocell AB) with the value 0Fh.

Input Macrocells (IMC)

The CPLD has 20 Input Macrocells (IMC), one for

each pin on Ports A and B, and 4 on Port C. The

architecture of the Input Macrocells (IMC) is

shown in Figure 62. The Input Macrocells (IMC)

are individually configurable, and can be used as

a latch, register, or to pass incoming Port signals

prior to driving them onto the PLD input bus. The

outputs of the Input Macrocells (IMC) can be read

by the MCU through the internal data bus.

The enable for the latch and clock for the register

are driven by a multiplexer whose inputs are a

product term from the CPLD AND Array or the

MCU Address Strobe (ALE). Each product term

output is used to latch or clock four Input Macro-

cells (IMC). Port inputs 3-0 can be controlled by

one product term and 7-4 by another.

Configurations for the Input Macrocells (IMC) are

specified by equations written in PSDsoft (see Ap-

plication Note AN1171). Outputs of the Input Mac-

rocells (IMC) can be read by the MCU via the IMC

buffer.

The Output Enable of the OMC. The

Output

Macrocells (OMC) block can be connected to an I/

O port pin as a PLD output. The output enable of

each port pin driver is controlled by a single prod-

uct term from the AND Array, ORed with the Direc-

tion Register output. The pin is enabled upon

Power-up if no output enable equation is defined

and if the pin is declared as a PLD output in PSD-

soft Express.

See I/O PORTS (PSD MODULE), page 119.

If the Output Macrocell (OMC) output is declared

as an internal node and not as a port pin output in

the PSDabel file, the port pin can be used for other

I/O functions. The internal node feedback can be

routed as an input to the AND Array.

Figure 62. Input Macrocell

[

]

MCU DATA BUS

D 7:0

_

INPUT MACROCELL RD

DIRECTION

REGISTER

(

)

ENABLE .OE

OUTPUT

MACROCELLS BC

PT

AND

MACROCELL AB

I/O PIN

PT

PORT

DRIVER

MUX

Q

D

PT

ALE

MUX

D FF

Q

D

G

FEEDBACK

LATCH

INPUT MACROCELL

AI06603

118/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

I/O PORTS (PSD MODULE)

There are four programmable I/O ports: Ports A, B,

C, and D in the PSD Module. Each of the ports is

eight bits except Port D, which is 3 bits. Each port

pin is individually user configurable, thus allowing

multiple functions per port. The ports are config-

ured using PSDsoft Express Configuration or by

the MCU writing to on-chip registers in the CSIOP

space. Port A is not available in the 52-pin pack-

age.

port pin has been defined, that pin is no longer

available for other purposes. Exceptions are not-

ed.

As shown in Figure 63, the ports contain an output

multiplexer whose select signals are driven by the

configuration bits in the Control Registers (Ports A

and B only) and PSDsoft Express Configuration.

Inputs to the multiplexer include the following:

–

Output data from the Data Out register

Latched address outputs

CPLD macrocell output

External Chip Select (ECS1-ECS2) from the

CPLD.

The topics discussed in this section are:

■

General Port architecture

Port operating modes

Port Configuration Registers (PCR)

Port Data Registers

The Port Data Buffer (PDB) is a tri-state buffer that

allows only one source at a time to be read. The

Port Data Buffer (PDB) is connected to the Internal

Data Bus for feedback and can be read by the

MCU. The Data Out and macrocell outputs, Direc-

tion and Control Registers, and port pin input are

all connected to the Port Data Buffer (PDB).

Individual Port functionality.

General Port Architecture

The general architecture of the I/O Port block is

shown in Figure 63. Individual Port architectures

are shown in Figure 65., page 124 to Figure

68., page 127. In general, once the purpose for a

Figure 63. General I/O Port Architecture

DATA OUT

REG.

DATA OUT

D

Q

WR

ADDRESS

ALE

ADDRESS

PORT PIN

D

G

Q

OUTPUT

MUX

MACROCELL OUTPUTS

EXT CS

READ MUX

P

D

B

OUTPUT

SELECT

DATA IN

CONTROL REG.

ENABLE OUT

D

Q

WR

DIR REG.

D

Q

(

)

ENABLE PRODUCT TERM .OE

INPUT

MACROCELL

CPLD-INPUT

AI06604

119/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

The Port pin’s tri-state output driver enable is con-

trolled by a two input OR gate whose inputs come

from the CPLD AND Array enable product term

and the Direction Register. If the enable product

term of any of the Array outputs are not defined

and that port pin is not defined as a CPLD output

in the PSDsoft, then the Direction Register has

sole control of the buffer that drives the port pin.

is configured as an output, the content of the Data

Out Register drives the pin. When configured as

an input, the MCU can read the port input through

the Data In buffer. See Figure 63., page 119.

Ports C and D do not have Control Registers, and

are in MCU I/O Mode by default. They can be used

for PLD I/O if equations are written for them in PS-

Dabel.

The contents of these registers can be altered by

the MCU. The Port Data Buffer (PDB) feedback

path allows the MCU to check the contents of the

registers.

Ports A, B, and C have embedded Input Macro-

cells (IMC). The Input Macrocells (IMC) can be

configured as latches, registers, or direct inputs to

the PLDs. The latches and registers are clocked

by Address Strobe (ALE) or a product term from

the PLD AND Array. The outputs from the Input

Macrocells (IMC) drive the PLD input bus and can

PLD I/O Mode

The PLD I/O Mode uses a port as an input to the

CPLD’s Input Macrocells (IMC), and/or as an out-

put from the CPLD’s Output Macrocells (OMC).

The output can be tri-stated with a control signal.

This output enable control signal can be defined

by a product term from the PLD, or by resetting the

corresponding bit in the Direction Register to '0.'

The corresponding bit in the Direction Register

must not be set to '1' if the pin is defined for a PLD

input signal in PSDsoft. The PLD I/O Mode is

specified in PSDsoft by declaring the port pins,

and then writing an equation assigning the PLD I/

O to a port.

be

read

by

the

MCU.

See

Input

Macrocell, page 118.

Port Operating Modes

The I/O Ports have several modes of operation.

Some modes can be defined using PSDsoft, some

by the MCU writing to the Control Registers in

CSIOP space, and some by both. The modes that

can only be defined using PSDsoft must be pro-

grammed into the device and cannot be changed

unless the device is reprogrammed. The modes

that can be changed by the MCU can be done so

dynamically at run-time. The PLD I/O, Data Port,

Address Input, and Peripheral I/O Modes are the

only modes that must be defined before program-

ming the device. All other modes can be changed

by the MCU at run-time. See Application Note

AN1171 for more detail.

Address Out Mode

Address Out Mode can be used to drive latched

MCU addresses on to the port pins. These port

pins can, in turn, drive external devices. Either the

output enable or the corresponding bits of both the

Direction Register and Control Register must be

set to a '1' for pins to use Address Out Mode. This

must be done by the MCU at run-time. See Table

94., page 121 for the address output pin assign-

ments on Ports A and B for various MCUs.

Peripheral I/O Mode

Peripheral I/O Mode can be used to interface with

external peripherals. In this mode, all of Port A

serves as a tri-state, bi-directional data buffer for

the MCU. Peripheral I/O Mode is enabled by set-

ting Bit 7 of the VM Register to a '1.' Figure

64., page 121 shows how Port A acts as a bi-di-

rectional buffer for the MCU data bus if Peripheral

I/O Mode is enabled. An equation for PSEL0 and/

or PSEL1 must be written in PSDsoft. The buffer is

tri-stated when PSEL0 or PSEL1 is low (not ac-

tive). The PSEN signal should be “ANDed” in the

PSEL equations to disable the buffer when PSEL

resides in the data space.

Table 92., page 121 summarizes which modes

are available on each port. Table 95., page 122

shows how and where the different modes are

configured. Each of the port operating modes are

described in the following sections.

MCU I/O Mode

In the MCU I/O Mode, the MCU uses the I/O Ports

block to expand its own I/O ports. By setting up the

CSIOP space, the ports on the PSD Module are

mapped into the MCU address space. The ad-

dresses of the ports are listed in Table

84., page 98.

A port pin can be put into MCU I/O Mode by writing

a '0' to the corresponding bit in the Control Regis-

ter. The MCU I/O direction may be changed by

writing to the corresponding bit in the Direction

Register, or by the output enable product term.

See Peripheral I/O Mode, page 120. When the pin

JTAG In-System Programming (ISP)

Port C is JTAG compliant, and can be used for In-

System Programming (ISP). For more information

on the JTAG Port, see PROGRAMMING IN-CIR-

CUIT

USING

THE

JTAG

SERIAL

INTERFACE, page 134.

120/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 64. Peripheral I/O Mode

RD

PSEL0

PSEL

PSEL1

D0-D7

VM REGISTER BIT 7

PA0-PA7

DATA BUS

WR

AI02886

Table 92. Port Operating Modes

(1)

Port Mode

MCU I/O

Port B

Port C

Port D

Port A

Yes

No

Yes

PLD I/O

McellAB Outputs

McellBC Outputs

Additional Ext. CS Outputs No

PLD Inputs

Address Out

Peripheral I/O

JTAG ISP

Yes

No

Yes

No

Yes

(2)

Yes

No

Yes

Yes (A7 – 0)

No

Yes

No

(3)

Yes

Note: 1. Port A is not available in the 52-pin package.

2. On pins PC2, PC3, PC4, and PC7 only.

3. JTAG pins (TMS, TCK, TDI, TDO) are dedicated pins.

Table 93. Port Operating Mode Settings

Control Register

Direction Register

(1)

Mode

Defined in PSDsoft

VM Register Setting

(1)

Setting

1 = output,

0 = input (Note 2)

MCU I/O

Declare pins only

Logic equations

Declare pins only

0

N/A

PLD I/O

N/A

1

(Note 2)

Address Out

(Port A,B)

1 (Note 2)

Peripheral I/O

(Port A)

Logic equations

(PSEL0 & 1)

N/A

PIO Bit = 1

Note: 1. N/A = Not Applicable

2. The direction of the Port A,B,C, and D pins are controlled by the Direction Register ORed with the individual output enable product

term (.oe) from the CPLD AND Array.

Table 94. I/O Port Latched Address Output Assignments

Port A (PA3-PA0)

Address a3-a0

Port A (PA7-PA4)

Address a7-a4

Port B (PB3-PB0)

Address a3-a0

Port B (PB7-PB4)

Address a7-a4

121/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Port Configuration Registers (PCR)

Each Port has a set of Port Configuration Regis-

ters (PCR) used for configuration. The contents of

the registers can be accessed by the MCU through

normal READ/WRITE bus cycles at the addresses

given in Table 84., page 98. The addresses in Ta-

ble Table 84 are the offsets in hexadecimal from

the base of the CSIOP register.

The pins of a port are individually configurable and

each bit in the register controls its respective pin.

For example, Bit 0 in a register refers to Bit 0 of its

port. The three Port Configuration Registers

(PCR), shown in Table 95, are used for setting the

Port configurations. The default Power-up state for

each register in Table 95 is 00h.

Note: The slew rate is a measurement of the rise

and fall times of an output. A higher slew rate

means a faster output response and may create

more electrical noise. A pin operates in a high slew

rate when the corresponding bit in the Drive Reg-

ister is set to '1.' The default rate is slow slew.

Table 99., page 123 shows the Drive Register for

Ports A, B, C, and D. It summarizes which pins can

be configured as Open Drain outputs and which

pins the slew rate can be set for.

Table 95. Port Configuration Registers (PCR)

Register Name

Control

Port

MCU Access

WRITE/READ

Control Register. Any bit reset to '0' in the Con-

trol Register sets the corresponding port pin to

MCU I/O Mode, and a '1' sets it to Address Out

Mode. The default mode is MCU I/O. Only Ports A

and B have an associated Control Register.

A,B

Direction

A,B,C,D

(1)

Drive Select

Note: 1. See Table 99., page 123 for Drive Register Bit definition.

Direction Register. The Direction Register, in

conjunction with the output enable (except for Port

D), controls the direction of data flow in the I/O

Ports. Any bit set to '1' in the Direction Register

causes the corresponding pin to be an output, and

any bit set to '0' causes it to be an input. The de-

fault mode for all port pins is input.

Figure 65., page 124 and Figure 66., page 125

show the Port Architecture diagrams for Ports A/B

and C, respectively. The direction of data flow for

Ports A, B, and C are controlled not only by the di-

rection register, but also by the output enable

product term from the PLD AND Array. If the out-

put enable product term is not active, the Direction

Register has sole control of a given pin’s direction.

Table 96. Port Pin Direction Control, Output

Enable P.T. Not Defined

Direction Register Bit

Port Pin Mode

0

1

Input

Output

Table 97. Port Pin Direction Control, Output

Enable P.T. Defined

Direction

Register Bit

Output Enable

P.T.

Port Pin Mode

0

1

0

Input

An example of a configuration for a Port with the

three least significant bits set to output and the re-

mainder set to input is shown in Table 98. Since

Port D only contains two pins (shown in Figure

68., page 127), the Direction Register for Port D

has only two bits active.

1

0

1

Output

Drive Select Register. The Drive Select Register

configures the pin driver as Open Drain or CMOS

for some port pins, and controls the slew rate for

the other port pins. An external pull-up resistor

should be used for pins configured as Open Drain.

Table 98. Port Direction Assignment Example

Bit 7 Bit6 Bit 5 Bit4 Bit 3 Bit2 Bit 1 Bit 0

0

1

A pin can be configured as Open Drain if its corre-

sponding bit in the Drive Select Register is set to a

'1.' The default pin drive is CMOS.

122/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Port Data Registers

The Port Data Registers, shown in Table 100, are

used by the MCU to write data to or read data from

the ports. Table 100 shows the register name, the

ports having each register type, and MCU access

for each register type. The registers are described

below.

Data In. Port pins are connected directly to the

Data In buffer. In MCU I/O Input Mode, the pin in-

put is read through the Data In buffer.

Register Bits are not set, writing to the macrocell

loads data to the macrocell flip-flops. See

PLDs, page 112.

OMC Mask Register. Each OMC Mask Register

Bit corresponds to an Output Macrocell (OMC) flip-

flop. When the OMC Mask Register Bit is set to a

'1,' loading data into the Output Macrocell (OMC)

flip-flop is blocked. The default value is '0' or un-

blocked.

Data Out Register. Stores output data written by

the MCU in the MCU I/O Output Mode. The con-

tents of the Register are driven out to the pins if the

Direction Register or the output enable product

term is set to '1.' The contents of the register can

also be read back by the MCU.

Output Macrocells (OMC). The CPLD Output

Macrocells (OMC) occupy a location in the MCU’s

address space. The MCU can read the output of

the Output Macrocells (OMC). If the OMC Mask

Input Macrocells (IMC). The Input Macrocells

(IMC) can be used to latch or store external inputs.

The outputs of the Input Macrocells (IMC) are rout-

ed to the PLD input bus, and can be read by the

MCU. See PLDs, page 112.

Enable Out. The Enable Out register can be read

by the MCU. It contains the output enable values

for a given port. A '1' indicates the driver is in out-

put mode. A '0' indicates the driver is in tri-state

and the pin is in input mode.

Table 99. Drive Register Pin Assignment

Drive

Bit 7

Bit 6

Bit 5

Bit 4

Open

Bit 3

Slew

Bit 2

Slew

Bit 1

Slew

Bit 0

Slew

Register

Open

Drain

Open

Drain

Open

Drain

Port A

Drain

Rate

Open

Drain

Open

Drain

Open

Drain

Open

Drain

Slew

Rate

Slew

Rate

Slew

Rate

Slew

Rate

Port B

Port C

Port D

Open

Drain

Open

Drain

Open

Drain

Open

Drain

Open

Drain

Open

Drain

Open

Drain

Open

Drain

Slew

Rate

Slew

Rate

(1)

NA

Note: 1. NA = Not Applicable.

Table 100. Port Data Registers

Register Name

Port

MCU Access

Data In

A,B,C,D

READ – input on pin

WRITE/READ

Data Out

READ – outputs of macrocells

WRITE – loading macrocells flip-flop

Output Macrocell

Mask Macrocell

A,B,C

WRITE/READ – prevents loading into a given

macrocell

Input Macrocell

Enable Out

A,B,C

READ – outputs of the Input Macrocells

READ – the output enable control of the port driver

123/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Ports A and B – Functionality and Structure

Ports A and B have similar functionality and struc-

ture, as shown in Figure 65. The two ports can be

configured to perform one or more of the following

functions:

–

CPLD Input – Via the Input Macrocells (IMC).

Latched Address output – Provide latched

address output as per Table 94., page 121.

Open Drain/Slew Rate – pins PA3-PA0 and

PB3-PB0 can be configured to fast slew rate,

pins PA7-PA4 and PB7-PB4 can be

configured to Open Drain Mode.

Peripheral Mode – Port A only (80-pin

package)

–

MCU I/O Mode

CPLD Output – Macrocells McellAB7-

McellAB0 can be connected to Port A or Port

B. McellBC7-McellBC0 can be connected to

Port B or Port C.

–

Figure 65. Port A and Port B Structure

DATA OUT

REG.

DATA OUT

D

Q

WR

PORT

A OR B PIN

ADDRESS

ALE

ADDRESS

D

G

Q

[

]

A 7:0

OUTPUT

MUX

MACROCELL OUTPUTS

READ MUX

P

D

B

OUTPUT

SELECT

DATA IN

CONTROL REG.

ENABLE OUT

D

Q

WR

DIR REG.

D

Q

(

)

ENABLE PRODUCT TERM .OE

INPUT

MACROCELL

CPLD-INPUT

AI06605

124/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Port C – Functionality and Structure

Port C can be configured to perform one or more

of the following functions (see Figure 66):

–

Open Drain – Port C pins can be configured in

Open Drain Mode

Battery Backup features – PC2 can be

–

MCU I/O Mode

CPLD Output – McellBC7-McellBC0 outputs

can be connected to Port B or Port C.

configured for a battery input supply, Voltage

Stand-by (V ).

STBY

PC4 can be configured as a Battery-on

Indicator (V ), indicating when V is

–

CPLD Input – via the Input Macrocells (IMC)

BATON

CC

In-System Programming (ISP) – JTAG pins

(TMS, TCK, TDI, TDO) are dedicated pins for

device programming. (See PROGRAMMING

IN-CIRCUIT USING THE JTAG SERIAL

INTERFACE, page 134, for more information

on JTAG programming.)

less than V

.

BAT

Port C does not support Address Out Mode, and

therefore no Control Register is required.

Figure 66. Port C Structure

DATA OUT

REG.

DATA OUT

D

Q

WR

PORT C PIN

1

SPECIAL FUNCTION

OUTPUT

MUX

[

]

MCELLBC 7:0

READ MUX

P

D

B

OUTPUT

SELECT

DATA IN

ENABLE OUT

DIR REG.

D

Q

WR

(

)

ENABLE PRODUCT TERM .OE

INPUT

MACROCELL

1

SPECIAL FUNCTION

CPLD-INPUT

CONFIGURATION

BIT

AI06618

Note: 1. ISP or battery back-up

125/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Port D – Functionality and Structure

Port D has two I/O pins (only one pin, PD1, in the

52-pin package). See Figure 67 and Figure

68., page 127. This port does not support Address

Out Mode, and therefore no Control Register is re-

quired. Of the eight bits in the Port D registers,

only Bits 2 and 1 are used to configure pins PD2

and PD1.

–

CPLD Input – direct input to the CPLD, no

Input Macrocells (IMC)

Slew rate – pins can be set up for fast slew

rate

–

Port D pins can be configured in PSDsoft Express

as input pins for other dedicated functions:

–

CLKIN (PD1) as input to the macrocells flip-

flops and APD counter

PSD Chip Select Input (CSI, PD2). Driving this

signal High disables the Flash memory, SRAM

and CSIOP.

Port D can be configured to perform one or more

of the following functions:

–

MCU I/O Mode

CPLD Output – External Chip Select (ECS1-

ECS2)

Figure 67. Port D Structure

DATA OUT

REG.

DATA OUT

D

Q

WR

PORT D PIN

OUTPUT

MUX

[

]

ECS 2:1

READ MUX

OUTPUT

SELECT

P

D

B

DATA IN

ENABLE PRODUCT

TERM (.OE)

DIR REG.

D

Q

WR

CPLD-INPUT

AI06606

126/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

External Chip Select

The CPLD also provides two External Chip Select

(ECS1-ECS2) outputs on Port D pins that can be

used to select external devices. Each External

Chip Select (ECS1-ECS2) consists of one product

term that can be configured active High or Low.

The output enable of the pin is controlled by either

the output enable product term or the Direction

Register. (See Figure 68.)

Figure 68. Port D External Chip Select Signals

ENABLE (.OE)

DIRECTION

REGISTER

PD1 PIN

ECS1

PT1

POLARITY

BIT

ENABLE (.OE)

DIRECTION

REGISTER

PD2 PIN

ECS2

PT2

POLARITY

BIT

AI06607

127/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

POWER MANAGEMENT

All PSD Modules offer configurable power saving

options. These options may be used individually or

in combinations, as follows:

signals are blocked from reaching memory

and PLDs, and the memories are deselected

internally. This allows the memory and PLDs

to remain in Standby Mode even if the

address/data signals are changing state

externally (noise, other devices on the MCU

bus, etc.). Keep in mind that any unblocked

PLD input signals that are changing states

keeps the PLD out of Stand-by Mode, but not

the memories.

PSD Chip Select Input (CSI, PD2) can be

used to disable the internal memories, placing

them in Standby Mode even if inputs are

changing. This feature does not block any

internal signals or disable the PLDs. This is a

good alternative to using the APD Unit. There

is a slight penalty in memory access time

when PSD Chip Select Input (CSI, PD2)

makes its initial transition from deselected to

selected.

The PMMRs can be written by the MCU at run-

time to manage power. The PSD Module

supports “blocking bits” in these registers that

are set to block designated signals from

reaching both PLDs. Current consumption of

the PLDs is directly related to the composite

frequency of the changes on their inputs (see

Figure 72 and Figure 73., page 135).

–

The primary and secondary Flash memory,

and SRAM blocks are built with power

management technology. In addition to using

special silicon design methodology, power

management technology puts the memories

into Standby Mode when address/data inputs

are not changing (zero DC current). As soon

as a transition occurs on an input, the affected

memory “wakes up,” changes and latches its

outputs, then goes back to standby. The

designer does not have to do anything special

to achieve Memory Standby Mode when no

inputs are changing—it happens

–

automatically.

–

The PLD sections can also achieve Standby

Mode when its inputs are not changing, as

described in the sections on the Power

Management Mode Registers (PMMR).

As with the Power Management Mode, the

Automatic Power Down (APD) block allows

the PSD Module to reduce to stand-by current

automatically. The APD Unit can also block

MCU address/data signals from reaching the

memories and PLDs.

–

Built in logic monitors the Address Strobe of

the MCU for activity. If there is no activity for a

certain time period (MCU is asleep), the APD

Unit initiates Power-down Mode (if enabled).

Once in Power-down Mode, all address/data

Significant power savings can be achieved by

blocking signals that are not used in DPLD or

CPLD logic equations.

Figure 69. APD Unit

APD EN

PMMR0 BIT 1=1

TRANSITION

DETECTION

DISABLE BUS

INTERFACE

ALE

PD

CLR

APD

CSIOP SELECT

FLASH SELECT

COUNTER

RESET

EDGE

DETECT

PD

CSI

PLD

SRAM SELECT

POWER DOWN

CLKIN

(

)

PDN SELECT

DISABLE

FLASH/SRAM

AI06608

128/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

The PSD Module has a Turbo Bit in PMMR0. This

bit can be set to turn the Turbo Mode off (the de-

fault is with Turbo Mode turned on). While Turbo

Mode is off, the PLDs can achieve standby current

when no PLD inputs are changing (zero DC cur-

rent). Even when inputs do change, significant

power can be saved at lower frequencies (AC cur-

rent), compared to when Turbo Mode is on. When

the Turbo Mode is on, there is a significant DC cur-

rent component and the AC component is higher.

–

Typical standby current is of the order of

microamperes. These standby current values

assume that there are no transitions on any

PLD input.

Other Power Saving Options. The PSD Module

offers other reduced power saving options that are

independent of the Power-down Mode. Except for

the SRAM Stand-by and PSD Chip Select Input

(CSI, PD2) features, they are enabled by setting

bits in PMMR0 and PMMR2.

Automatic Power-down (APD) Unit and Power-

down Mode. The APD Unit, shown in Figure

69., page 128, puts the PSD Module into Power-

down Mode by monitoring the activity of Address

Strobe (ALE). If the APD Unit is enabled, as soon

as activity on Address Strobe (ALE) stops, a four-

bit counter starts counting. If Address Strobe

(ALE/AS, PD0) remains inactive for fifteen clock

periods of CLKIN (PD1), Power-down (PDN) goes

High, and the PSD Module enters Power-down

Mode, as discussed next.

Figure 70. Enable Power-down Flow Chart

RESET

Enable APD

Set PMMR0 Bit 1 = 1

OPTIONAL

Power-down Mode. By default, if you enable the

APD Unit, Power-down Mode is automatically en-

abled. The device enters Power-down Mode if Ad-

dress Strobe (ALE) remains inactive for fifteen

periods of CLKIN (PD1).

Disable desired inputs to PLD

by setting PMMR0 bits 4 and 5

and PMMR2 bits 2 through 6.

The following should be kept in mind when the

PSD Module is in Power-down Mode:

ALE idle

for 15 CLKIN

clocks?

No

–

If Address Strobe (ALE) starts pulsing again,

the PSD Module returns to normal Operating

mode. The PSD Module also returns to normal

Operating mode if either PSD Chip Select

Input (CSI, PD2) is Low or the RESET input is

High.

Yes

PSD Module in Power

Down Mode

AI06609

–

The MCU address/data bus is blocked from all

memory and PLDs.

Various signals can be blocked (prior to

Power-down Mode) from entering the PLDs by

setting the appropriate bits in the PMMR

registers. The blocked signals include MCU

control signals and the common CLKIN (PD1).

Table 101. Power-down Mode’s Effect on Ports

Port Function

MCU I/O

Pin Level

No Change

Note: Blocking CLKIN (PD1) from the PLDs

does not block CLKIN (PD1) from the APD

Unit.

All memories enter Standby Mode and are

drawing standby current. However, the PLD

and I/O ports blocks do not go into Standby

Mode because you don’t want to have to wait

for the logic and I/O to “wake-up” before their

outputs can change. See Table 101 for Power-

down Mode effects on PSD Module ports.

PLD Out

No Change

Undefined

Tri-State

Address Out

Peripheral I/O

–

129/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PLD Power Management

PSD Chip Select Input (CSI, PD2)

The power and speed of the PLDs are controlled

by the Turbo Bit (Bit 3) in PMMR0. By setting the

bit to '1,' the Turbo Mode is off and the PLDs con-

sume the specified stand-by current when the in-

puts are not switching for an extended time of

70ns. The propagation delay time is increased by

10ns (for a 5V device) after the Turbo Bit is set to

'1' (turned off) when the inputs change at a com-

posite frequency of less than 15MHz. When the

Turbo Bit is reset to '0' (turned on), the PLDs run

at full power and speed. The Turbo Bit affects the

PLD’s DC power, AC power, and propagation de-

lay. When the Turbo Mode is off, the uPSD3200

input clock frequency is reduced by 5MHz from the

maximum rated clock frequency.

Blocking MCU control signals with the bits of

PMMR2 can further reduce PLD AC power con-

sumption.

SRAM Standby Mode (Battery Backup). The

SRAM in the PSD Module supports a battery back-

up mode in which the contents are retained in the

event of a power loss. The SRAM has Voltage

PD2 of Port D can be configured in PSDsoft Ex-

press as PSD Chip Select Input (CSI). When Low,

the signal selects and enables the PSD Module

Flash memory, SRAM, and I/O blocks for READ or

WRITE operations. A High on PSD Chip Select In-

put (CSI, PD2) disables the Flash memory, and

SRAM, and reduces power consumption. Howev-

er, the PLD and I/O signals remain operational

when PSD Chip Select Input (CSI, PD2) is High.

Input Clock

CLKIN (PD1) can be turned off, to the PLD to save

AC power consumption. CLKIN (PD1) is an input

to the PLD AND Array and the Output Macrocells

(OMC).

During Power-down Mode, or, if CLKIN (PD1) is

not being used as part of the PLD logic equation,

the clock should be disabled to save AC power.

CLKIN (PD1) is disconnected from the PLD AND

Array or the Macrocells block by setting Bits 4 or 5

to a '1' in PMMR0.

Input Control Signals

The PSD Module provides the option to turn off the

MCU signals (WR, RD, PSEN, and Address

Strobe (ALE)) to the PLD to save AC power con-

sumption. These control signals are inputs to the

PLD AND Array. During Power-down Mode, or, if

any of them are not being used as part of the PLD

logic equation, these control signals should be dis-

abled to save AC power. They are disconnected

from the PLD AND Array by setting Bits 2, 3, 4, 5,

and 6 to a '1' in PMMR2.

Stand-by (V

an external battery. When V

, PC2) that can be connected to

STBY

becomes lower

CC

than V

then the SRAM automatically con-

STBY

nects to Voltage Stand-by (V

er source. The SRAM Standby Current (I

typically 0.5 µA. The SRAM data retention voltage

is 2V minimum. The Battery-on Indicator

, PC2) as a pow-

STBY

) is

STBY

(V

BATON

) can be routed to PC4. This signal indi-

cates when the V has dropped below V

.

CC

STBY

Table 102. Power Management Mode Registers PMMR0

Bit 0

Bit 1

Bit 2

X

0

Not used, and should be set to zero.

0 = off Automatic Power-down (APD) is disabled.

1 = on Automatic Power-down (APD) is enabled.

APD Enable

X

0

Not used, and should be set to zero.

0 = on PLD Turbo Mode is on

Bit 3

PLD Turbo

PLD Turbo Mode is off, saving power.

uPSD3200 operates at 5MHz below the maximum rated clock frequency

1 = off

0 = on

CLKIN (PD1) input to the PLD AND Array is connected. Every change of CLKIN

(PD1) Powers-up the PLD when Turbo Bit is '0.'

Bit 4

Bit 5

PLD Array clk

PLD MCell clk

1 = off CLKIN (PD1) input to PLD AND Array is disconnected, saving power.

0 = on CLKIN (PD1) input to the PLD macrocells is connected.

1 = off CLKIN (PD1) input to PLD macrocells is disconnected, saving power.

Bit 6

Bit 7

X

0

Not used, and should be set to zero.

130/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 103. Power Management Mode Registers PMMR2

Bit 0

Bit 1

X

0

Not used, and should be set to zero.

0 = on WR input to the PLD AND Array is connected.

PLD Array

WR

Bit 2

Bit 3

Bit 4

Bit 5

1 = off WR input to PLD AND Array is disconnected, saving power.

0 = on RD input to the PLD AND Array is connected.

PLD Array

RD

1 = off RD input to PLD AND Array is disconnected, saving power.

0 = on PSEN input to the PLD AND Array is connected.

1 = off PSEN input to PLD AND Array is disconnected, saving power.

0 = on ALE input to the PLD AND Array is connected.

PLD Array

PSEN

PLD Array

ALE

1 = off ALE input to PLD AND Array is disconnected, saving power.

Bit 6

Bit 7

X

0

Not used, and should be set to zero.

Note: The bits of this register are cleared to zero following Power-up. Subsequent RESET pulses do not clear the registers.

Table 104. APD Counter Operation

APD Enable Bit

ALE Level

X

APD Counter

0

1

Not Counting

Pulsing

0 or 1

Counting (Generates PDN after 15 Clocks)

131/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

RESET TIMING AND DEVICE STATUS AT RESET

Upon Power-up, the PSD Module requires a Reset

before the device is operational after a Warm

RESET. Figure 71 shows the timing of the Power-

up and Warm RESET.

(RESET) pulse of duration t after V is

NLNH-PO

CC

steady. During this period, the device loads inter-

nal configurations, clears some of the registers

and sets the Flash memory into operating mode.

After the rising edge of Reset (RESET), the PSD

Module remains in the Reset Mode for an addition-

I/O Pin, Register and PLD Status at RESET

Table 105 shows the I/O pin, register and PLD sta-

tus during Power-on RESET, Warm RESET, and

Power-down Mode. PLD outputs are always valid

during Warm RESET, and they are valid in Power-

on RESET once the internal Configuration bits are

loaded. This loading is completed typically long

al period, t

allowed.

, before the first memory access is

OPR

The Flash memory is reset to the READ Mode

upon Power-up. Sector Select (FS0-FS7 and

CSBOOT0-CSBOOT3) must all be Low, WRITE

Strobe (WR, CNTL0) High, during Power-on

RESET for maximum security of the data contents

and to remove the possibility of a byte being writ-

ten on the first edge of WRITE Strobe (WR). Any

Flash memory WRITE cycle initiation is prevented

before the V ramps up to operating level. Once

CC

the PLD is active, the state of the outputs are de-

termined by the PLD equations.

Reset of Flash Memory Erase and Program

Cycles

A Reset (RESET) also resets the internal Flash

memory state machine. During a Flash memory

Program or Erase cycle, Reset (RESET) termi-

nates the cycle and returns the Flash memory to

automatically when V is below V

.

CC

LKO

Warm RESET

Once the device is up and running, the PSD Mod-

ule can be reset with a pulse of a much shorter du-

the READ Mode within a period of t

.

NLNH-A

ration, t

. The same t

NLNH

period is needed

OPR

Figure 71. Reset (RESET) Timing

V_CC(min)

V_CC

t

NLNH

t

OPR

t

NLNH-PO

NLNH-A

OPR

Power-On Reset

Warm Reset

RESET

AI02866b

132/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 105. Status During Power-on RESET, Warm RESET and Power-down Mode

Port Configuration

MCU I/O

Power-On RESET

Input mode

Warm RESET

Input mode

Power-down Mode

Unchanged

Valid after internal PSD

configuration bits are

loaded

Depends on inputs to PLD

(addresses are blocked in

PD Mode)

PLD Output

Valid

Address Out

Tri-stated

Not defined

Tri-stated

Peripheral I/O

Register

Power-On RESET

Warm RESET

Power-down Mode

PMMR0 and PMMR2

Cleared to '0'

Unchanged

Cleared to '0' by internal

Power-on RESET

Depends on .re and .pr

equations

Depends on .re and .pr

equations

Macrocells flip-flop status

Initialized, based on the

selection in PSDsoft

Configuration menu

Initialized, based on the

selection in PSDsoft

Configuration menu

(1)

Unchanged

VM Register

All other registers

Cleared to '0'

Note: 1. The SR_cod and PeriphMode Bits in the VM Register are always cleared to '0' on Power-on RESET or Warm RESET.

133/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PROGRAMMING IN-CIRCUIT USING THE JTAG SERIAL INTERFACE

The JTAG Serial Interface pins (TMS, TCK, TDI,

TDO) are dedicated pins on Port C (see Table

106). All memory blocks (primary and secondary

Flash memory), PLD logic, and PSD Module Con-

figuration Register Bits may be programmed

through the JTAG Serial Interface block. A blank

device can be mounted on a printed circuit board

and programmed using JTAG.

The standard JTAG signals (IEEE 1149.1) are

TMS, TCK, TDI, and TDO. Two additional signals,

TSTAT and TERR, are optional JTAG extensions

used to speed up Program and Erase cycles.

JTAG Extensions

TSTAT and TERR are two JTAG extension signals

enabled by an “ISC_ENABLE” command received

over the four standard JTAG signals (TMS, TCK,

TDI, and TDO). They are used to speed Program

and Erase cycles by indicating status on uPDS

signals instead of having to scan the status out se-

rially using the standard JTAG channel. See Appli-

cation Note AN1153.

TERR indicates if an error has occurred when

erasing a sector or programming a byte in Flash

memory. This signal goes Low (active) when an

Error condition occurs, and stays Low until an

“ISC_CLEAR” command is executed or a chip Re-

set (RESET) pulse is received after an

“ISC_DISABLE” command.

By default, on a blank device (as shipped from the

factory or after erasure), four pins on Port C are

the basic JTAG signals TMS, TCK, TDI, and TDO.

Standard JTAG Signals

TSTAT behaves the same as Ready/Busy de-

scribed in Ready/Busy (PC3), page 99. TSTAT is

High when the PSD Module device is in READ

Mode (primary and secondary Flash memory con-

tents can be read). TSTAT is Low when Flash

memory Program or Erase cycles are in progress,

and also when data is being written to the second-

ary Flash memory.

At power-up, the standard JTAG pins are inputs,

waiting for a JTAG serial command from an exter-

nal JTAG controller device (such as FlashLINK or

Automated Test Equipment). When the enabling

command is received, TDO becomes an output

and the JTAG channel is fully functional. The

same command that enables the JTAG channel

may optionally enable the two additional JTAG sig-

nals, TSTAT and TERR.

The RESET input to the uPS3200 should be active

during JTAG programming. The active RESET

puts the MCU module into RESET Mode while the

PSD Module is being programmed. See Applica-

tion Note AN1153 for more details on JTAG In-

System Programming (ISP).

TSTAT and TERR can be configured as open-

drain type signals during an “ISC_ENABLE” com-

mand.

Security and Flash memory Protection

When the Security Bit is set, the device cannot be

read on a Device Programmer or through the

JTAG Port. When using the JTAG Port, only a Full

Chip Erase command is allowed.

The uPSD323X Devices supports JTAG In-Sys-

tem-Configuration (ISC) commands, but not

Boundary Scan. The PSDsoft Express software

tool and FlashLINK JTAG programming cable im-

plement the JTAG In-System-Configuration (ISC)

commands.

All other Program, Erase and Verify commands

are blocked. Full Chip Erase returns the part to a

non-secured blank state. The Security Bit can be

set in PSDsoft Express Configuration.

All primary and secondary Flash memory sectors

can individually be sector protected against era-

sures. The sector protect bits can be set in PSD-

soft Express Configuration.

Table 106. JTAG Port Signals

Port C Pin

PC0

JTAG Signals

TMS

Description

Mode Select

INITIAL DELIVERY STATE

PC1

PC3

PC4

PC5

PC6

TCK

Clock

When delivered from ST, the uPSD323X Devices

have all bits in the memory and PLDs set to '1.'

The code, configuration, and PLD logic are loaded

using the programming procedure. Information for

programming the device is available directly from

ST. Please contact your local sales representa-

tive.

TSTAT

TERR

TDI

Status (optional)

Error Flag (optional)

Serial Data In

Serial Data Out

TDO

134/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

AC/DC PARAMETERS

These tables describe the AD and DC parameters

of the uPSD323X Devices:

The following are issues concerning the parame-

ters presented:

■ DC Electrical Specification

■ AC Timing Specification

–

In the DC specification the supply current is

given for different modes of operation.

The AC power component gives the PLD,

Flash memory, and SRAM mA/MHz

specification. Figures 72 and 73 show the PLD

mA/MHz as a function of the number of

Product Terms (PT) used.

–

■

PLD Timing

–

Combinatorial Timing

Synchronous Clock Mode

Asynchronous Clock Mode

Input Macrocell Timing

–

In the PLD timing parameters, add the

required delay when Turbo Bit is '0.'

■

MCU Module Timing

–

READ Timing

WRITE Timing

Power-down and RESET Timing

Figure 72. PLD I /Frequency Consumption (5V range)

CC

110

100

90

V

= 5V

CC

80

70

60

50

40

30

20

10

0

PT 100%

PT 25%

0

5

10

15

20

25

HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)

AI02894

Figure 73. PLD I /Frequency Consumption (3V range)

CC

60

V

= 3V

CC

50

40

30

20

10

0

PT 100%

PT 25%

0

5

10

15

20

25

HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)

AI03100

135/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 107. PSD Module Example, Typ. Power Calculation at V = 5.0V (Turbo Mode Off)

CC

Conditions

MCU Clock Frequency

Highest Composite PLD input frequency

(Freq PLD)

= 12MHz

= 8MHz

MCU ALE frequency (Freq ALE)

% Flash memory Access

% SRAM access

= 2MHz

= 80%

= 15%

% I/O access

= 5% (no additional power above base)

Operational Modes

% Normal

= 40%

= 60%

% Power-down Mode

Number of product terms used

(from fitter report)

= 45 PT

% of total product terms

Turbo Mode

= 45/182 = 24.7%

= Off

Calculation (using typical values)

I

total

= I (MCUactive) x %MCUactive + I (PSDactive) x %PSDactive + I (pwrdown) x %pwrdown

CC CC PD

CC

I

(MCUactive)

= 20mA

= 250µA

= I (ac) + I (dc)

CC

(pwrdown)

PD

(PSDactive)

CC

= %flash x 2.5mA/MHz x Freq ALE

+ %SRAM x 1.5mA/MHz x Freq ALE

+ % PLD x (from graph using Freq PLD)

= 0.8 x 2.5mA/MHz x 2MHz + 0.15 x 1.5mA/MHz x 2MHz + 24mA

= (4 + 0.45 + 24) mA

= 28.45mA

I

total

= 20mA x 40% + 28.45mA x 40% + 250µA x 60%

= 8mA + 11.38mA + 150µA

= 19.53mA

CC

This is the operating power with no Flash memory Erase or Program cycles in progress. Calculation is based on all I/O

pins being disconnected and I = 0mA.

OUT

136/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

MAXIMUM RATING

Stressing the device above the rating listed in the

Absolute Maximum Ratings” table may cause per-

manent damage to the device. These are stress

ratings only and operation of the device at these or

any other conditions above those indicated in the

Operating sections of this specification is not im-

plied. Exposure to Absolute Maximum Rating con-

ditions for extended periods may affect device

reliability. Refer also to the STMicroelectronics

SURE Program and other relevant quality docu-

ments.

Table 108. Absolute Maximum Ratings

Symbol

Parameter

Min.

Max.

125

235

6.5

Unit

°C

V

T

Storage Temperature

Lead Temperature during Soldering (20 seconds max.)

–65

STG

(1)

T

LEAD

V

IO

Input and Output Voltage (Q = V or Hi-Z)

OH

–0.5

V

CC

Supply Voltage

6.5

V

Device Programmer Supply Voltage

Electrostatic Discharge Voltage (Human Body Model)

–0.5

14.0

2000

V

PP

(2)

V

ESD

–2000

V

Note: 1. IPC/JEDEC J-STD-020A

2. JEDEC Std JESD22-A114A (C1=100pF, R1=1500 Ω, R2=500 Ω)

137/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

EMC CHARACTERISTICS

Susceptibility test are performed on a sample ba-

sis during product characterization.

Functional EMS (Electromagnetic

Susceptibility)

Based on a simple running application on the

product (toggling 2 LEDs through I/O ports), the

product is stressed by two electromagnetic events

until a failure occurs (indicated by the LEDs).

ESD. Electro-Static Discharge (positive and neg-

ative) is applied on all pins of the device until a

functional disturbance occurs. This test conforms

with the IEC 1000-4-2 Standard.

Software Recommendations. The

software

flowchart must include the management of ‘run-

away’ conditions, such as:

–

Corrupted program counter

Unexpected reset

Critical data corruption (e.g., control registers)

Prequalification trials. Most of the common fail-

ures (unexpected reset and program counter cor-

ruption) can be reproduced by manually forcing a

low state on the RESET pin or the oscillator pins

for 1 second.

To complete these trials, ESD stress can be ap-

plied directly on the device over the range of spec-

ification values. When unexpected behavior is

detected, the software can be hardened to prevent

unrecoverable errors occurring (see Application

Note AN1015).

FTB. A burst of Fast Transient voltage (positive

and negative) is applied to V and V through a

DD

SS

100pF capacitor, until a functional disturbance oc-

curs. This test conforms with the IEC 1000-4-2

Standard.

A device reset allows normal operations to be re-

sumed. The test results are given in Table 109,

based on the EMS levels and classes defined in

Application Note AN1709.

Designing Hardened Software To Avoid Noise

Problems

EMC characterization and optimization are per-

formed at component level with a typical applica-

tion environment and simplified MCU software. It

should be noted that good EMC performance is

highly dependent on the user application and the

software in particular.

Absolute Maximum Ratings (Electrical

Sensitivity)

Based on three different tests (ESD, LU, and DLU)

and using specific measurement methods, the

product is stressed in order to determine its perfor-

mance in terms of electrical sensitivity. For more

details, refer to the Application Note AN1181.

Electro-Static Discharge (ESD). Electro-Static

discharges (a positive then a negative pulse sepa-

rated by 1 second) are applied to the pins of each

sample according to each pin combination. The

sample size depends on the number of supply pins

in the device (3 parts*(n+1) supply pin). The Hu-

man Body Model is simulated (see Table 110).

This test conforms to the JESD22-A114A Stan-

dard.

Therefore, it is recommended that the user applies

EMC software optimization and prequalification

tests in relation with the EMC level requested for

the user’s application.

Table 109. EMS Test Results

Level/

Symbol

Parameter

Conditions

(1)

Class

V

= 4V; T = 25°C; f

= 40MHz;

OSC

Voltage limits to be applied on any I/O pin to

induce a functional disturbance

DD

A

V

FESD

3C

WDT off conforms to IEC 1000-4-2

Note: 1. Data based on characterization results, not tested in production.

Table 110. ESD Absolute Maximum Ratings

(1)

Symbol

Parameter

Conditions

Unit

Maximum Value

Electro-static discharge voltage (Human

Body Model)

V

T = 25°C

A

2000

V

ESD(HBM)

Note: 1. Data based on characterization results, not tested in production

138/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

LU. 3 complementary static tests are required on

DLU. Electro-static discharges (one positive then

one negative test) are applied to each pin of 3

samples when the micro is running to assess the

latch-up performance in dynamic mode. Power

supplies are set to the typical values, the oscillator

is connected as near as possible to the pins of the

micro, and the component is put in reset mode.

This test conforms to the IEC 1000-4-2 and

SAEJ1752/3 Standards (see Table 111). For more

details, refer to the Application Note, AN1181.

10 parts to assess the latch-up performance. A

supply overvoltage (applied to each power supply

pin) and a current injection (applied to each input,

output, and configurable I/O pin) are performed on

each sample. This test conforms to the EIA/JESD

78 IC Latch-up Standard (see Table 111). For

more details, refer to the Application Note,

AN1181.

Table 111. Latch-up and Dynamic Latch-up Electrical Sensitivities

Level/

Symbol

Parameter

Conditions

(1)

Class

T = 25°C

LU

Static Latch-up Class

Dynamic Latch-up Class

A

DLU

V

DD

= 5V; T = 25°C; f

= 40MHz

OSC

A

Note: 1. Class description: A Class is an STMicroelectronics internal specification. All of its limits are higher than the JEDEC specifications.

This means when a device belongs to “Class A,” it exceeds the JEDEC standard. “Class B” strictly covers all of the JEDEC criteria

(International standards).

139/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

DC AND AC PARAMETERS

This section summarizes the operating and mea-

surement conditions, and the DC and AC charac-

teristics of the device. The parameters in the DC

and AC Characteristic tables that follow are de-

rived from tests performed under the Measure-

ment Conditions summarized in the relevant

tables. Designers should check that the operating

conditions in their circuit match the measurement

conditions when relying on the quoted parame-

ters.

Table 112. Operating Conditions (5V Devices)

Symbol

Parameter

Min.

4.5

–40

0

Max.

5.5

85

Unit

V

CC

Supply Voltage

Ambient Operating Temperature (Industrial)

Ambient Operating Temperature (Commercial)

°C

T

A

70

Table 113. Operating Conditions (3V Devices)

Symbol

Parameter

Min.

3.0

–40

0

Max.

3.6

85

Unit

V

CC

Supply Voltage

Ambient Operating Temperature (Industrial)

Ambient Operating Temperature (Commercial)

°C

T

A

70

Table 114. AC Letter Symbols for Timing

Table 115. AC Signal Behavior Symbols for

Timing

A

C

D

I

Address

t

Time

Clock

L

Logic Level Low or ALE

Logic Level High

Valid

Input Data

Instruction

ALE

H

V

X

Z

L

No Longer a Valid Logic Level

Float

N

P

Q

R

W

B

RESET Input or Output

PSEN signal

Output Data

RD signal

WR signal

PW

Pulse Width

Note: Example: t

= Time from Address Valid to ALE Invalid.

AVLX

V

STBY

Output

M

Output Macrocell

Note: Example: t

= Time from Address Valid to ALE Invalid.

AVLX

140/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 74. Switching Waveforms – Key

INPUTS

OUTPUTS

WAVEFORMS

STEADY INPUT

STEADY OUTPUT

MAY CHANGE FROM

HI TO LO

WILL BE CHANGING

FROM HI TO LO

MAY CHANGE FROM

LO TO HI

WILL BE CHANGING

LO TO HI

DON'T CARE

CHANGING, STATE

UNKNOWN

OUTPUTS ONLY

CENTER LINE IS

TRI-STATE

AI03102

141/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 116. Major Parameters

Parameters/Conditions/

Comments

5V Test

Conditions

3.3V Test

Conditions

5.0V Value

3.3V Value

Unit

Operating Voltage

–

4.5 to 5.5

–40 to 85

–

3.0 to 3.6

–40 to 85

V

Operating Temperature

°C

MCU Frequency

12MHz (min) for USB;

–

1 Min, 40 Max

–

1 Min, 24 Max MHz

2

8MHz (min) for I C

Active Current, Typical

(25°C operation; 80% Flash and

15% SRAM accesses, 45 PLD

product terms used; PLD Turbo

mode Off)

24MHz MCU clock,

12MHz PLD input

frequency, 4MHz ALE

12MHz MCU clock,

6MHz PLD input

frequency, 2MHz ALE

72

21

7

mA

Idle Current, Typical

(CPU halted but some peripherals 24MHz MCU clock,

active; 25°C operation; 45 PLD

product terms used; PLD Turbo

mode Off)

12MHz MCU clock,

1MHz PLD input

frequency

12MHz PLD input

frequency

25

mA

µA

Standby Current, Typical

(Power-down Mode, requires reset

to exit mode; without Low-Voltage

Detect (LVD) Supervisor)

180µA with LVD

–

110

0.5

100µA with LVD

–

60

SRAM Backup Current, Typical

(If external battery is attached.)

0.5

µA

V

= 0.25V (max);

I

= 8 (max);

= –2 (min)

V

= 0.15V (max);

I

= 4 (max);

= –1 (min)

I/O Sink/Source Current

Ports A, B, C, and D

OL

mA

= 3.9V (min)

I

= 2.6V (min)

I

OH

PLD Macrocells

(For registered or combinatorial

logic)

–

16

69

–

16

69

–

PLD Inputs

(Inputs from pins, macrocell

feedback, or MCU addresses)

–

PLD Outputs

(Output to pins or internal

feedback)

–

16

15

–

16

22

–

PLD Propagation Delay, Typical

(PLD input to output, Turbo Mode)

ns

142/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 117. DC Characteristics (5V Devices)

Test Condition

(in addition to those

in Table

Symbol

Parameter

Min.

Typ.

Max.

Unit

112., page 140)

Input High Voltage (Ports 1, 2,

3, 4[Bits 7,6,5,4,3,1,0], XTAL1,

RESET)

V

0.5

+

CC

V

4.5V < V < 5.5V

0.7V

CC

V

IH

CC

V

0.5

+

Input High Voltage (Ports A, B,

C, D, 4[Bit 2], USB+, USB–)

CC

V

IH1

4.5V < V < 5.5V

2.0

CC

Input Low Voltage (Ports 1, 2, 3,

4[Bits 7,6,5,4,3,1,0], XTAL1,

RESET)

V

4.5V < V < 5.5V

V

– 0.5

0.3V

CC

IL

CC

SS

Input Low Voltage

(Ports A, B, C, D, 4[Bit 2])

4.5V < V < 5.5V

–0.5

– 0.5

0.8

0.1

V

CC

V

IL1

Input Low Voltage

(USB+, USB–)

4.5V < V < 5.5V

CC

SS

I

OL

= 20µA

0.01

0.25

V

= 4.5V

CC

Output Low Voltage

(Ports A,B,C,D)

V

OL

I

V

= 8mA

= 4.5V

OL

0.45

V

CC

Output Low Voltage

(Ports 1,2,3,4, WR, RD)

I

OL

= 1.6mA

OL1

Output Low Voltage

(Port 0, ALE, PSEN)

V

OL2

I

= 3.2mA

= –20µA

OL

I

OH

4.4

2.4

4.49

3.9

V

= 4.5V

CC

Output High Voltage

(Ports A,B,C,D)

V

OH

I

= –2mA

OH

V

= 4.5V

CC

I

= –80µA

= –10µA

= –800µA

= –80µA

= –1µA

2.4

4.05

2.4

V

OH

Output High Voltage

(Ports 1,2,3,4, WR, RD)

V

OH1

I

OH

I

OH

Output High Voltage (Port 0 in

ext. Bus Mode, ALE, PSEN)

V

OH2

I

4.05

OH

Output High Voltage V

I

V

– 0.8

STBY

OH3

STBYON

OH

V

Low Voltage RESET

0.1V hysteresis

= 3.2mA

3.75

4.0

4.25

3.0

LVR

XTAL Open Bias Voltage

(XTAL1, XTAL2)

V

I

OL

2.0

2.5

2.0

2

V

OP

V

(min) for Flash Erase and

CC

V

4.2

LKO

Program

V

CC

–

V

STBY

SRAM (PSD) Stand-by Voltage

V

0.2

SRAM (PSD) Data Retention

Voltage

V

I

Only on V

STBY

V

DF

IL

V

= 0.45V

Logic '0' Input Current

(Ports 1,2,3,4)

IN

–10

–50

µA

(0V for Port 4[pin 2])

143/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Test Condition

(in addition to those

Symbol

Parameter

Min.

Typ.

Max.

Unit

in Table

112., page 140)

V

= 3.5V

Logic 1-to-0 Transition Current

(Ports 1,2,3,4)

IN

I

–65

–650

1

µA

TL

(2.5V for Port 4[pin 2])

SRAM (PSD) Stand-by Current

I

V

CC

= 0V

0.5

STBY

(V

input)

STBY

SRAM (PSD) Idle Current

(V input)

I

V

> V

–0.1

–10

–20

0.1

–55

–50

IDLE

CC STBY

STBY

Reset Pin Pull-up Current

(RESET)

I

V

= V

IN SS

RST

XTAL1 = V

XTAL2 = V

XTAL Feedback Resistor

Current (XTAL1)

CC

I

FR

SS

I

V

< V < V

Input Leakage Current

Output Leakage Current

–1

1

µA

LI

SS IN CC

I

LO

0.45 < V

< V

OUT CC

–10

10

V

= 5.5V

CC

250

µA

LVD logic disabled

(1)

Power-down Mode

I

PD

LVD logic enabled

380

30

10

38

20

62

30

µA

mA

Active (12MHz)

Idle (12MHz)

Active (24MHz)

Idle (24MHz)

Active (40MHz)

Idle (40MHz)

20

8

V

CC

V

CC

V

CC

= 5V

30

15

40

20

(2,3,6)

I

CC_CPU

PLD_TURBO = Off,

(5)

0

µA/P

µA/PT

mA

(4)

f = 0MHz

PLD Only

PLD_TURBO = On,

f = 0MHz

400

15

700

30

I

CC_PSD

Operating

Supply Current

Flash

(6)

During Flash memory

WRITE/Erase Only

(DC)

memory

Read-only, f = 0MHz

f = 0MHz

0

mA

SRAM

PLD AC Base

Note 5

I

CC_PSD

Flash memory AC Adder

SRAM AC Adder

2.5

1.5

3.5

3.0

mA/MHz

6

(AC)

Note: 1. I (Power-down Mode) is measured with:

PD

2. XTAL1=V ; XTAL2=not connected; RESET=V ; Port 0 =V ; all other pins are disconnected. PLD not in Turbo Mode.

SS

CC

3. I

(active mode) is measured with:

CC_CPU

4. XTAL1 driven with t

, t

= 5ns, V = V +0.5V, V = Vcc – 0.5V, XTAL2 = not connected; RESET=V ; Port 0=V ; all

CLCH CHCL IL SS IH SS CC

other pins are disconnected. I would be slightly higher if a crystal oscillator is used (approximately 1mA).

CC

5. I

(Idle Mode) is measured with:

CC_CPU

6. XTAL1 driven with t

, t

= 5ns, V = V +0.5V, V = V – 0.5V, XTAL2 = not connected; Port 0 = V

;

CC

CLCH CHCL

IL

SS

IH

CC

7. RESET=V ; all other pins are disconnected.

CC

8. PLD is in non-Turbo Mode and none of the inputs are switching.

9. See Figure 72., page 135 for the PLD current calculation.

10. I/O current = 0mA, all I/O pins are disconnected.

144/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 118. DC Characteristics (3V Devices)

Test Condition

(in addition to those

in Table

Symbol

Parameter

Min.

Typ.

Max.

Unit

113., page 140)

Input High Voltage (Ports 1, 2,

3, 4[Bits 7,6,5,4,3,1,0], A, B, C,

D, XTAL1, RESET)

V

3.0V < V < 3.6V

0.7V

V

+ 0.5

V

IH

CC

Input High Voltage (Port 4[Bit

2])

V

IH1

3.0V < V < 3.6V

+ 0.5

2.0

CC

Input High Voltage (Ports 1, 2,

3, 4[Bits 7,6,5,4,3,1,0], XTAL1,

RESET)

V

3.0V < V < 3.6V

V

– 0.5

0.3V

CC

IL

CC

SS

Input Low Voltage

(Ports A, B, C, D)

3.0V < V < 3.6V

–0.5

– 0.5

0.8

0.1

V

CC

V

IL1

V

OL

Input Low Voltage

(Port 4[Bit 2])

3.0V < V < 3.6V

CC

SS

I

OL

= 20µA

0.01

0.15

V

CC

= 3.0V

Output Low Voltage

(Ports A,B,C,D)

I

V

= 4mA

= 3.0V

OL

0.45

V

CC

I

= 1.6mA

= 100µA

= 3.2mA

= 200µA

= –20µA

0.45

0.3

V

OL

OH

Output Low Voltage

(Ports 1,2,3,4, WR, RD)

V

OL1

I

0.45

0.3

Output Low Voltage

(Port 0, ALE, PSEN)

OL2

I

V

2.9

2.4

2.99

2.6

V

= 3.0V

CC

Output High Voltage

(Ports A,B,C,D)

V

OH

I

V

= –1mA

OH

= 3.0V

CC

I

= –20µA

= –10µA

= –800µA

= –80µA

= –1µA

2.0

2.7

2.0

2.7

V

OH

Output High Voltage

(Ports 1,2,3,4, WR, RD)

V

OH1

I

OH

Output High Voltage (Port 0 in

ext. Bus Mode, ALE, PSEN)

V

OH2

I

OH

Output High Voltage V

I

V

– 0.8

STBY

OH3

STBYON

OH

V

Low Voltage Reset

0.1V hysteresis

= 3.2mA

2.3

2.5

2.7

2.0

LVR

XTAL Open Bias Voltage

(XTAL1, XTAL2)

V

I

OL

1.0

V

OP

V

(min) for Flash Erase and

CC

V

1.5

2.0

2

2.2

V

LKO

Program

V

STBY

V

– 0.2

CC

SRAM (PSD) Stand-by Voltage

SRAM (PSD) Data Retention

Voltage

V

Only on V

STBY

DF

IL

V

IN

= 0.45V

Logic '0' Input Current

(Ports 1,2,3,4)

I

–1

–50

µA

(0V for Port 4[pin 2])

145/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Test Condition

(in addition to those

Symbol

Parameter

Min.

Typ.

Max.

Unit

in Table

113., page 140)

V

= 3.5V

Logic 1-to-0 Transition Current

(Ports 1,2,3,4)

IN

I

–25

–250

1

µA

TL

(2.5V for Port 4[pin 2])

SRAM (PSD) Stand-by Current

I

V

CC

= 0V

0.5

STBY

(V

input)

STBY

SRAM (PSD) Idle Current

(V input)

I

V

> V

–0.1

–10

–20

0.1

–55

–50

IDLE

CC STBY

STBY

Reset Pin Pull-up Current

(RESET)

I

V

= V

IN SS

RST

XTAL1 = V

XTAL2 = V

XTAL Feedback Resistor

Current (XTAL1)

CC

I

FR

SS

I

V

< V < V

Input Leakage Current

Output Leakage Current

–1

1

µA

LI

SS IN CC

I

LO

0.45 < V

< V

OUT CC

–10

10

V

= 3.6V

CC

110

µA

LVD logic disabled

(1)

Power-down Mode

I

PD

LVD logic enabled

180

10

5

µA

mA

Active (12MHz)

Idle (12MHz)

Active (24MHz)

Idle (24MHz)

8

4

V

= 3.6V

CC

(2,3,6)

I

CC_CPU

15

8

20

10

CC

PLD_TURBO = Off,

(5)

0

µA/PT

mA

(4)

f = 0MHz

PLD Only

PLD_TURBO = On,

f = 0MHz

200

10

400

25

I

CC_PSD

Operating

Supply Current

Flash

(6)

During Flash memory

WRITE/Erase Only

(DC)

memory

Read-only, f = 0MHz

f = 0MHz

0

mA

SRAM

PLD AC Base

Note 5

I

CC_PSD

(6)

Flash memory AC Adder

SRAM AC Adder

1.5

0.8

2.0

1.5

mA/MHz

(AC)

Note: 1. I (Power-down Mode) is measured with:

PD

2. XTAL1=V ; XTAL2=not connected; RESET=V ; Port 0 =V ; all other pins are disconnected. PLD not in Turbo mode.

SS

CC

3. I

(active mode) is measured with:

CC_CPU

4. XTAL1 driven with t

, t

= 5ns, V = V +0.5V, V = Vcc – 0.5V, XTAL2 = not connected; RESET=V ; Port 0=V ; all

CLCH CHCL IL SS IH SS CC

other pins are disconnected. I would be slightly higher if a crystal oscillator is used (approximately 1mA).

CC

5. I

(Idle Mode) is measured with:

CC_CPU

6. XTAL1 driven with t

, t

= 5ns, V = V +0.5V, V = V – 0.5V, XTAL2 = not connected; Port 0 = V

;

CC

CLCH CHCL

IL

SS

IH

CC

7. RESET=V ; all other pins are disconnected.

CC

8. PLD is in non-Turbo Mode and none of the inputs are switching.

9. See Figure 72., page 135 for the PLD current calculation.

10. I/O current = 0mA, all I/O pins are disconnected.

146/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 75. External Program Memory READ Cycle

t

LLPL

LHLL

ALE

t

AVLL

PLPH

t

LLIV

t

PLIV

PSEN

t

PXAV

LLAX

t

PXIZ

t

AZPL

PORT 0

INSTR

IN

A0-A7

t

AVIV

t

PXIX

A8-A11

PORT 2

AI06848

Table 119. External Program Memory AC Characteristics (with the 5V MCU Module)

Variable Oscillator

40MHz Oscillator

1/t

= 24 to 40MHz

Max

CLCL

(1)

Symbol

Unit

Parameter

Min

35

Max

Min

– 15

CLCL

t

2t

t

ALE pulse width

Address set-up to ALE

ns

LHLL

AVLL

LLAX

LLIV

t

– 15

10

CLCL

t

Address hold after ALE

ALE Low to valid instruction in

ALE to PSEN

10

4t

CLCL

– 45

55

t

– 15

10

60

LLPL

PLPH

PLIV

PXIX

CLCL

3t

PSEN pulse width

CLCL

3t

t

– 45

– 10

PSEN to valid instruction in

Input instruction hold after PSEN

30

15

CLCL

0

(2)

Input instruction float after PSEN

ns

t

CLCL

PXIZ

(2)

t

– 5

Address valid after PSEN

Address to valid instruction in

Address float to PSEN

20

–5

ns

t

CLCL

PXAV

5t

CLCL

– 55

70

AVIV

–5

AZPL

Note: 1. Conditions (in addition to those in Table 112., page 140, V = 4.5 to 5.5V): V = 0V; C for Port 0, ALE and PSEN output is 100pF;

CC

SS

L

C

L

for other outputs is 80pF

2. Interfacing the uPSD323X Devices to devices with float times up to 20ns is permissible. This limited bus contention does not cause

any damage to Port 0 drivers.

147/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 120. External Program Memory AC Characteristics (with the 3V MCU Module)

Variable Oscillator

24MHz Oscillator

1/t

= 8 to 24MHz

Max

(1)

CLCL

Symbol

Unit

Parameter

Min

43

Max

Min

– 40

CLCL

t

2t

t

ALE pulse width

Address set-up to ALE

ns

LHLL

AVLL

LLAX

LLIV

t

– 25

17

CLCL

t

Address hold after ALE

ALE Low to valid instruction in

ALE to PSEN

17

4t

CLCL

– 87

80

t

– 20

– 30

22

95

LLPL

PLPH

PLIV

PXIX

CLCL

3t

PSEN pulse width

CLCL

3t

t

– 65

– 10

PSEN to valid instruction in

Input instruction hold after PSEN

Input instruction float after PSEN

60

32

CLCL

0

(2)

t

CLCL

PXIZ

(2)

t

– 5

Address valid after PSEN

Address to valid instruction in

Address float to PSEN

37

ns

t

CLCL

PXAV

5t

CLCL

– 60

148

AVIV

–10

AZPL

Note: 1. Conditions (in addition to those in Table 113., page 140, V = 3.0 to 3.6V): V = 0V; C for Port 0, ALE and PSEN output is 100pF,

CC

SS

L

for 5V devices, and 50pF for 3V devices; C for other outputs is 80pF, for 5V devices, and 50pF for 3V devices)

L

2. Interfacing the uPSD323X Devices to devices with float times up to 35ns is permissible. This limited bus contention does not cause

any damage to Port 0 drivers.

Table 121. External Clock Drive (with the 5V MCU Module)

Variable Oscillator

40MHz Oscillator

1/t

= 24 to 40MHz

Max

(1)

CLCL

Symbol

Unit

Parameter

Min

Max

Min

25

t

Oscillator period

41.7

ns

RLRH

WLWH

LLAX2

RHDX

t

– t

10

High time

Low time

Rise time

Fall time

10

CLCL

CLCX

10

CLCL

CLCX

Note: 1. Conditions (in addition to those in Table 112., page 140, V = 4.5 to 5.5V): V = 0V; C for Port 0, ALE and PSEN output is 100pF;

CC

SS

L

C

L

for other outputs is 80pF

Table 122. External Clock Drive (with the 3V MCU Module)

Variable Oscillator

24MHz Oscillator

Min Max

1/t

= 8 to 24MHz

(1)

CLCL

Symbol

Unit

Parameter

Min

Max

t

Oscillator period

41.7

12

125

ns

RLRH

WLWH

LLAX2

RHDX

t

– t

12

High time

Low time

Rise time

Fall time

CLCL

CLCX

12

CLCL

CLCX

Note: 1. Conditions (in addition to those in Table 113., page 140, V = 3.0 to 3.6V): V = 0V; C for Port 0, ALE and PSEN output is 100pF,

CC

SS

L

for 5V devices, and 50pF for 3V devices; C for other outputs is 80pF, for 5V devices, and 50pF for 3V devices)

L

148/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 76. External Data Memory READ Cycle

ALE

tLHLL

tWHLH

PSEN

tLLDV

tLLWL

tRLRH

RD

PORT 0

PORT 2

tRHDZ

tRLDV

tRLAZ

tAVLL

tLLAX2

tRHDX

A0-A7 from PCL

A0-A7 from

RI or DPL

DATA IN

INSTR IN

tAVWL

tAVDV

P2.0 to P2.3 or A8-A11 from DPH

A8-A11 from PCH

AI07088

Figure 77. External Data Memory WRITE Cycle

ALE

tLHLL

tWHLH

PSEN

tLLWL

tWLWH

WR

tWHQX

tQVWX

tQVWH

DATA OUT

tAVLL

tLLAX

A0-A7 from

RI or DPL

A0-A7 from PCL

INSTR IN

PORT 0

PORT 2

tAVWL

P2.0 to P2.3 or A8-A11 from DPH

A8-A11 from PCH

AI07089

149/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 123. External Data Memory AC Characteristics (with the 5V MCU Module)

Variable Oscillator

40MHz Oscillator

1/t

= 24 to 40MHz

(1)

CLCL

Symbol

Unit

Parameter

Min

120

10

Max

Min

Max

t

6t

t

– 30

RD pulse width

WR pulse width

ns

RLRH

WLWH

LLAX2

RHDX

RHDZ

LLDV

CLCL

t

– 30

– 15

Address hold after ALE

RD to valid data in

CLCL

5t

– 50

75

CLCL

Data hold after RD

0

2t

8t

9t

t

– 12

– 50

– 75

+ 15

Data float after RD

38

150

90

CLCL

ALE to valid data in

Address to valid data in

ALE to WR or RD

AVDV

LLWL

3t

– 15

– 30

– 15

– 20

– 50

– 20

60

70

10

5

CLCL

4t

t

Address valid to WR or RD

WR or RD High to ALE High

Data valid to WR transition

Data set-up before WR

Data hold after WR

AVWL

WHLH

QVWX

QVWH

WHQX

RLAZ

CLCL

t

+ 15

40

CLCL

t

7t

t

125

5

CLCL

Address float after RD

0

Note: 1. Conditions (in addition to those in Table 112., page 140, V = 4.5 to 5.5V): V = 0V; C for Port 0, ALE and PSEN output is 100pF;

CC

SS

L

C

L

for other outputs is 80pF

150/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 124. External Data Memory AC Characteristics (with the 3V MCU Module)

Variable Oscillator

24MHz Oscillator

1/t

= 8 to 24MHz

(1)

CLCL

Symbol

Unit

Parameter

Min

180

56

Max

Min

Max

t

6t

2t

– 70

RD pulse width

WR pulse width

ns

RLRH

WLWH

LLAX2

RHDX

RHDZ

LLDV

CLCL

t

– 70

– 27

Address hold after ALE

RD to valid data in

5t

2t

– 90

118

CLCL

Data hold after RD

0

– 20

– 133

– 155

+ 50

Data float after RD

63

CLCL

8t

9t

t

ALE to valid data in

200

220

175

CLCL

Address to valid data in

ALE to WR or RD

AVDV

LLWL

3t

4t

t

– 50

– 97

– 25

– 37

– 122

– 27

75

67

17

5

CLCL

Address valid to WR or RD

WR or RD High to ALE High

Data valid to WR transition

Data set-up before WR

Data hold after WR

AVWL

WHLH

QVWX

QVWH

WHQX

RLAZ

CLCL

t

+ 25

67

CLCL

t

7t

t

170

15

Address float after RD

0

Note: 1. Conditions (in addition to those in Table 113., page 140, V = 3.0 to 3.6V): V = 0V; C for Port 0, ALE and PSEN output is 100pF,

CC

SS

L

for 5V devices, and 50pF for 3V devices; C for other outputs is 80pF, for 5V devices, and 50pF for 3V devices)

L

Table 125. A/D Analog Specification

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

V

Analog Power Supply Input

Voltage Range

AV

V

CC

REF

SS

V

AN

V

SS

– 0.3

AV

+ 0.3

Analog Input Voltage Range

V

REF

Current Following between V

CC

I

200

µA

AVDD

and V

SS

CA

Overall Accuracy

±2

20

l.s.b.

µs

IN

N

Non-Linearity Error

NLE

N

Differential Non-Linearity Error

Zero-Offset Error

Full Scale Error

DNLE

N

ZOE

N

FSE

N

Gain Error

GE

T

Conversion Time

at 8MHz clock

CONV

151/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 78. Input to Output Disable / Enable

INPUT

tER

tEA

INPUT TO

OUTPUT

ENABLE/DISABLE

AI02863

Table 126. CPLD Combinatorial Timing (5V Devices)

Slew

PT Turbo

Symbol

Parameter

Conditions

Min

Max

20

Unit

ns

(1)

Aloc

Off

rate

CPLD Input Pin/Feedback to

CPLD Combinatorial Output

(2)

+ 2

+ 10

– 2

t

PD

CPLD Input to CPLD Output

Enable

t

21

+ 10

– 2

ns

EA

CPLD Input to CPLD Output

Disable

21

ns

ER

CPLD Register Clear or Preset

Delay

21

ns

ARP

ARPW

ARD

CPLD Register Clear or Preset

Pulse Width

10

ns

Any

macrocell

CPLD Array Delay

11

+ 2

ns

Note: 1. Fast Slew Rate output available on PA3-PA0, PB3-PB0, and PD2-PD1. Decrement times by given amount

2. t for MCU address and control signals refers to delay from pins on Port 0, Port 2, RD WR, PSEN and ALE to CPLD combinatorial

PD

output (80-pin package only)

Table 127. CPLD Combinatorial Timing (3V Devices)

Slew

PT Turbo

Symbol

Parameter

Conditions

Min

Max

40

Unit

ns

(1)

Aloc

Off

rate

CPLD Input Pin/Feedback to

CPLD Combinatorial Output

(2)

+ 4

+ 20

– 6

t

PD

CPLD Input to CPLD Output

Enable

t

43

+ 20

– 6

ns

EA

CPLD Input to CPLD Output

Disable

43

ns

ER

CPLD Register Clear or

Preset Delay

40

ns

ARP

ARPW

ARD

CPLD Register Clear or

Preset Pulse Width

25

ns

Any

macrocell

CPLD Array Delay

25

+ 4

ns

Note: 1. Fast Slew Rate output available on PA3-PA0, PB3-PB0, and PD2-PD1. Decrement times by given amount

2. t for MCU address and control signals refers to delay from pins on Port 0, Port 2, RD WR, PSEN and ALE to CPLD combinatorial

PD

output (80-pin package only)

152/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 79. Synchronous Clock Mode Timing – PLD

t

CL

CH

CLKIN

INPUT

t

S

t

H

t

CO

REGISTERED

OUTPUT

AI02860

Table 128. CPLD Macrocell Synchronous Clock Mode Timing (5V Devices)

Slew

PT Turbo

Symbol

Parameter

Conditions

Min

Max

40.0

66.6

83.3

Unit

MHz

(1)

Aloc

Off

rate

Maximum Frequency

External Feedback

1/(t +t

)

S

CO

Maximum Frequency

f

1/(t +t –10)

S CO

MAX

Internal Feedback (f

)

CNT

Maximum Frequency

Pipelined Data

1/(t +t

)

CH CL

t

Input Setup Time

Input Hold Time

12

0

+ 2

+ 10

ns

S

H

Clock High Time

Clock Low Time

Clock Input

Any macrocell

6

CH

CL

CO

ARD

MIN

6

Clock to Output Delay

CPLD Array Delay

13

11

– 2

+ 2

(2)

t +t

CH CL

12

Minimum Clock Period

Note: 1. Fast Slew Rate output available on PA3-PA0, PB3-PB0, and PD2-PD1. Decrement times by given amount.

2. CLKIN (PD1) t = t + t

.

CL

CLCL

CH

153/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 129. CPLD Macrocell Synchronous Clock Mode Timing (3V Devices)

Slew

PT

Aloc

Turbo

Off

Symbol

Parameter

Conditions

Min

Max

22.2

28.5

40.0

Unit

MHz

(1)

rate

Maximum Frequency

External Feedback

1/(t +t

)

S

CO

Maximum Frequency

f

1/(t +t –10)

S CO

MAX

Internal Feedback (f

)

CNT

Maximum Frequency

Pipelined Data

1/(t +t

)

CH CL

t

Input Setup Time

Input Hold Time

20

0

+ 4

+ 20

ns

S

H

Clock High Time

Clock Low Time

Clock Input

Any macrocell

15

10

CH

CL

CO

ARD

MIN

Clock to Output Delay

CPLD Array Delay

25

– 6

+ 4

(2)

t +t

CH CL

25

Minimum Clock Period

Note: 1. Fast Slew Rate output available on PA3-PA0, PB3-PB0, and PD2-PD1. Decrement times by given amount.

2. CLKIN (PD1) t = t + t

.

CL

CLCL

CH

Figure 80. Asynchronous RESET / Preset

tARPW

RESET/PRESET

INPUT

tARP

REGISTER

OUTPUT

AI02864

Figure 81. Asynchronous Clock Mode Timing (product term clock)

tCHA

tCLA

CLOCK

INPUT

tSA

tHA

tCOA

REGISTERED

OUTPUT

AI02859

154/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 130. CPLD Macrocell Asynchronous Clock Mode Timing (5V Devices)

PT Turbo Slew

Symbol

Parameter

Conditions

1/(t +t

Min

Max

38.4

62.5

71.4

Unit

MHz

Aloc

Off

Rate

Maximum Frequency

External Feedback

)

SA COA

Maximum Frequency

f

1/(t +t

–10)

)

MAXA

SA COA

Internal Feedback (f

)

CNTA

Maximum Frequency

Pipelined Data

1/(t

+t

CHA CLA

t

Input Setup Time

7

8

9

+ 2

+ 10

ns

SA

Input Hold Time

HA

Clock Input High Time

Clock Input Low Time

Clock to Output Delay

CPLD Array Delay

Minimum Clock Period

+ 10

CHA

CLA

COA

ARDA

MINA

21

11

– 2

Any macrocell

+ 2

1/f

CNTA

16

Table 131. CPLD Macrocell Asynchronous Clock Mode Timing (3V Devices)

PT Turbo Slew

Symbol

Parameter

Conditions

Min

Max

21.7

27.8

33.3

Unit

MHz

Aloc

Off

Rate

Maximum Frequency

External Feedback

1/(t +t

)

SA COA

Maximum Frequency

f

1/(t +t

–10)

)

MAXA

SA COA

Internal Feedback (f

)

CNTA

Maximum Frequency

Pipelined Data

1/(t

+t

CHA CLA

t

Input Setup Time

Input Hold Time

10

12

17

13

+ 4

+ 20

ns

SA

HA

Clock High Time

+ 20

CHA

CLA

COA

ARD

MINA

Clock Low Time

Clock to Output Delay

CPLD Array Delay

Minimum Clock Period

36

25

– 6

Any macrocell

+ 4

1/f

CNTA

36

155/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 82. Input Macrocell Timing (product term clock)

t

INL

INH

PT CLOCK

INPUT

t

IH

IS

OUTPUT

t

INO

AI03101

Table 132. Input Macrocell Timing (5V Devices)

PT

Aloc

Turbo

Off

Symbol

Parameter

Input Setup Time

Conditions

Min

Max

Unit

t

0

15

9

ns

IS

(Note 1)

t

Input Hold Time

+ 10

IH

NIB Input High Time

NIB Input Low Time

INH

INL

INO

9

NIB Input to Combinatorial Delay

34

+ 2

+ 10

Note: 1. Inputs from Port A, B, and C relative to register/ latch clock from the PLD. ALE/AS latch timings refer to t

and t

.

LXAX

AVLX

Table 133. Input Macrocell Timing (3V Devices)

PT

Aloc

Turbo

Off

Symbol

Parameter

Input Setup Time

Conditions

Min

Max

Unit

t

0

ns

IS

(Note 1)

t

Input Hold Time

25

12

+ 20

IH

NIB Input High Time

NIB Input Low Time

INH

INL

INO

NIB Input to Combinatorial Delay

46

+ 4

+ 20

Note: 1. Inputs from Port A, B, and C relative to register/latch clock from the PLD. ALE latch timings refer to t

and t

.

LXAX

AVLX

156/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 134. Program, WRITE and Erase Times (5V Devices)

Symbol

Parameter

Min.

Typ.

8.5

3

Max.

30

Unit

Flash Program

s

(1)

s

Flash Bulk Erase (pre-programmed)

Flash Bulk Erase (not pre-programmed)

Sector Erase (pre-programmed)

Sector Erase (not pre-programmed)

Byte Program

5

s

t

1

30

WHQV3

WHQV2

WHQV1

2.2

14

s

150

µs

Program / Erase Cycles (per Sector)

Sector Erase Time-Out

100,000

cycles

µs

t

100

WHWLO

Q7VQV

(2)

30

ns

DQ7 Valid to Output (DQ7-DQ0) Valid (Data Polling)

Note: 1. Programmed to all zero before erase.

2. The polling status, DQ7, is valid t

time units before the data byte, DQ0-DQ7, is valid for reading.

Q7VQV

Table 135. Program, WRITE and Erase Times (3V Devices)

Symbol

Parameter

Min.

Typ.

8.5

3

Max.

30

Unit

Flash Program

s

(1)

s

Flash Bulk Erase (pre-programmed)

Flash Bulk Erase (not pre-programmed)

Sector Erase (pre-programmed)

Sector Erase (not pre-programmed)

Byte Program

5

t

1

30

s

WHQV3

WHQV2

WHQV1

2.2

14

s

150

µs

cycles

µs

ns

Program / Erase Cycles (per Sector)

Sector Erase Time-Out

100,000

t

100

WHWLO

Q7VQV

(2)

30

DQ7 Valid to Output (DQ7-DQ0) Valid (Data Polling)

Note: 1. Programmed to all zero before erase.

2. The polling status, DQ7, is valid t

time units before the data byte, DQ0-DQ7, is valid for reading.

Q7VQV

157/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 83. Peripheral I/O READ Timing

ALE

ADDRESS

DATA VALID

A/D BUS

t

(PA)

AVQV

t

SLQV

CSI

RD

t

(PA)

RLQV

t

(PA)

RHQZ

t

(PA)

DVQV

DATA ON PORT A

AI06610

Table 136. Port A Peripheral Data Mode READ Timing (5V Devices)

Turbo

Symbol

Parameter

Conditions

Min

Max

Unit

Off

+ 10

Address Valid to Data

t

37

ns

AVQV–PA

(Note 1)

Valid

t

CSI Valid to Data Valid

27

32

22

23

ns

SLQV–PA

RLQV–PA

DVQV–PA

RHQZ–PA

RD to Data Valid

(Note 2)

Data In to Data Out Valid

RD to Data High-Z

Note: 1. Any input used to select Port A Data Peripheral Mode.

2. Data is already stable on Port A.

Table 137. Port A Peripheral Data Mode READ Timing (3V Devices)

Turbo

Off

Symbol

Parameter

Conditions

Min

Max

Unit

t

Address Valid to Data Valid

CSI Valid to Data Valid

RD to Data Valid

50

37

45

38

36

+ 20

ns

AVQV–PA

SLQV–PA

RLQV–PA

DVQV–PA

RHQZ–PA

(Note 1)

(Note 2)

Data In to Data Out Valid

RD to Data High-Z

Note: 1. Any input used to select Port A Data Peripheral Mode.

2. Data is already stable on Port A.

158/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 84. Peripheral I/O WRITE Timing

ALE

ADDRESS

DATA OUT

A/D BUS

tWHQZ (PA)

tWLQV (PA)

WR

tDVQV (PA)

PORT A

DATA OUT

AI06611

Table 138. Port A Peripheral Data Mode WRITE Timing (5V Devices)

Symbol

WLQV–PA

DVQV–PA

WHQZ–PA

Parameter

WR to Data Propagation Delay

Data to Port A Data Propagation Delay

WR Invalid to Port A Tri-state

Conditions

Min

Max

25

Unit

ns

t

22

ns

(Note 1)

20

ns

Note: 1. Data stable on Port 0 pins to data on Port A.

Table 139. Port A Peripheral Data Mode WRITE Timing (3V Devices)

Symbol

WLQV–PA

DVQV–PA

WHQZ–PA

Parameter

WR to Data Propagation Delay

Data to Port A Data Propagation Delay

WR Invalid to Port A Tri-state

Conditions

Min

Max

42

Unit

ns

t

38

ns

(Note 1)

33

ns

Note: 1. Data stable on Port 0 pins to data on Port A.

159/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 85. Reset (RESET) Timing

V_CC(min)

V_CC

t

NLNH

t

OPR

t

OPR

NLNH-PO

Power-On Reset

NLNH-A

Warm Reset

RESET

AI02866b

Table 140. Reset (RESET) Timing (5V Devices)

Symbol

Parameter

Conditions

Min

150

1

Max

Unit

(1)

t

ns

ms

µs

ns

NLNH

RESET Active Low Time

Power-on Reset Active Low Time

NLNH–PO

NLNH–A

OPR

(2)

25

Warm RESET

RESET High to Operational Device

120

Note: 1. Reset (RESET) does not reset Flash memory Program or Erase cycles.

2. Warm RESET aborts Flash memory Program or Erase cycles, and puts the device in READ Mode.

Table 141. Reset (RESET) Timing (3V Devices)

Symbol

Parameter

Conditions

Min

300

1

Max

Unit

ns

(1)

t

NLNH

RESET Active Low Time

Power-on Reset Active Low Time

ms

µs

NLNH–PO

NLNH–A

OPR

(2)

25

Warm RESET

RESET High to Operational Device

300

ns

Note: 1. Reset (RESET) does not reset Flash memory Program or Erase cycles.

2. Warm RESET aborts Flash memory Program or Erase cycles, and puts the device in READ Mode.

Table 142. V

Symbol

Definitions Timing (5V Devices)

Parameter

STBYON

Conditions

Min

Typ

Max

Unit

t

V

Detection to V

Output High

STBYON

20

µs

BVBH

STBY

(Note 1)

Off Detection to V

Output

STBY

STBYON

t

20

µs

BXBL

(Note 1)

Low

Note: 1. V

timing is measured at V ramp rate of 2ms.

CC

STBYON

Table 143. V

Symbol

Timing (3V Devices)

Parameter

STBYON

Conditions

Min

Typ

Max

Unit

t

V

Detection to V

Output High

STBYON

20

µs

BVBH

STBY

(Note 1)

Off Detection to V

Output

STBY

STBYON

t

20

µs

BXBL

(Note 1)

Low

Note: 1. V

timing is measured at V ramp rate of 2ms.

CC

STBYON

160/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 86. ISC Timing

t_ISCCH

TCK

t_ISCCL

t_ISCPSU

t_ISCPH

TDI/TMS

t _ISCPZV

t_ISCPCO

ISC OUTPUTS/TDO

t_ISCPVZ

ISC OUTPUTS/TDO

AI02865

Table 144. ISC Timing (5V Devices)

Symbol

Parameter

Conditions

Min

Max

Unit

MHz

ns

t

Clock (TCK, PC1) Frequency (except for PLD)

Clock (TCK, PC1) High Time (except for PLD)

Clock (TCK, PC1) Low Time (except for PLD)

Clock (TCK, PC1) Frequency (PLD only)

Clock (TCK, PC1) High Time (PLD only)

20

ISCCF

(Note 1)

(Note 2)

t

23

ISCCH

ISCCL

ns

2

MHz

ns

ISCCFP

ISCCHP

240

t

Clock (TCK, PC1) Low Time (PLD only)

ISC Port Set Up Time

240

7

ns

ISCCLP

ISCPSU

ISCPH

ISC Port Hold Up Time

5

ISC Port Clock to Output

21

ISCPCO

ISCPZV

ISCPVZ

ISC Port High-Impedance to Valid Output

ISC Port Valid Output to High-Impedance

Note: 1. For non-PLD Programming, Erase or in ISC By-pass Mode.

2. For Program or Erase PLD only.

161/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 145. ISC Timing (3V Devices)

Symbol

Parameter

Conditions

(Note 1)

(Note 2)

Min

Max

Unit

MHz

ns

t

Clock (TCK, PC1) Frequency (except for PLD)

Clock (TCK, PC1) High Time (except for PLD)

Clock (TCK, PC1) Low Time (except for PLD)

Clock (TCK, PC1) Frequency (PLD only)

Clock (TCK, PC1) High Time (PLD only)

12

ISCCF

t

40

ISCCH

ISCCL

ns

2

MHz

ns

ISCCFP

ISCCHP

240

t

Clock (TCK, PC1) Low Time (PLD only)

ISC Port Set Up Time

240

12

5

ns

ISCCLP

ISCPSU

ISCPH

ISC Port Hold Up Time

ISC Port Clock to Output

30

ISCPCO

ISCPZV

ISCPVZ

ISC Port High-Impedance to Valid Output

ISC Port Valid Output to High-Impedance

Note: 1. For non-PLD Programming, Erase or in ISC By-pass Mode.

2. For Program or Erase PLD only.

Figure 87. MCU Module AC Measurement I/O Waveform

V

– 0.5V

0.45V

CC

0.2 V

+ 0.9V

CC

Test Points

– 0.1V

CC

AI06650

Note: AC inputs during testing are driven at V –0.5V for a logic '1,' and 0.45V for a logic '0.'

CC

Timing measurements are made at V (min) for a logic '1,' and V (max) for a logic '0'

IH

IL

Figure 88. PSD Module AC Float I/O Waveform

V

– 0.1V

OH

OL

V

+ 0.1V

LOAD

Test Reference Points

– 0.1V

+ 0.1V

LOAD

0.2 V

CC

AI06651

Note: For timing purposes, a Port pin is considered to be no longer floating when a 100mV change from load voltage occurs, and begins to

float when a 100mV change from the loaded V or V level occurs

OH

OL

I

and I ≥ 20mA

OH

OL

162/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 89. External Clock Cycle

Figure 90. Recommended Oscillator Circuits

Note: C1, C2 = 30pF ± 10pF for crystals

For ceramic resonators, contact resonator manufacturer

Oscillation circuit is designed to be used either with a ceramic resonator or crystal oscillator. Since each crystal and ceramic resonator

have their own characteristics, the user should consult the crystal manufacturer for appropriate values of external components.

Figure 91. PSD Module AC Measurement I/O

Waveform

Figure 92. PSD ModuleAC Measurement Load

Circuit

2.01 V

3.0V

195 Ω

Test Point

1.5V

Device

Under Test

0V

C_L= 30 pF

(Including Scope and

Jig Capacitance)

AI03104b

AI03103b

Table 146. Capacitance

2

Symbol

Parameter

Test Condition

Max.

Unit

pF

Typ.

C

V

= 0V

Input Capacitance (for input pins)

4

6

IN

Output Capacitance (for input/

output pins)

pF

C

V

OUT

8

12

OUT

Note: 1. Sampled only, not 100% tested.

2. Typical values are for T = 25°C and nominal supply voltages.

A

163/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PACKAGE MECHANICAL INFORMATION

Figure 93. TQFP52 – 52-lead Plastic Thin, Quad, Flat Package Outline

D

D1

D2

A2

e

b

Ne

E2 E1 E

N

1

Nd

A

CP

L1

c

A1

α

L

QFP-A

Note: Drawing is not to scale.

164/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 147. TQFP52 – 52-lead Plastic Thin, Quad, Flat Package Mechanical Data

mm

Min

–

inches

Min

–

Symb

Typ

Max

1.75

0.020

1.55

0.04

0.23

–

Typ

Max

0.069

0.008

0.061

0.016

0.009

–

A

A1

A2

b

–

0.05

1.25

0.02

0.07

–

0.002

0.049

0.007

0.002

–

c

–

D

12.00

10.00

0.473

0.394

D1

D2

E

–

12.00

10.00

–

0.473

0.394

–

E1

E2

e

0.65

–

0.45

–

0.75

–

0.026

–

0.018

–

0.030

–

L

L1

α

1.00

–

0.039

–

0°

7°

0°

7°

n

52

13

–

52

13

–

Nd

Ne

CP

–

0.10

–

0.004

165/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Figure 94. TQFP80 – 80-lead Plastic Thin, Quad, Flat Package Outline

D

D1

D2

A2

e

b

Ne

E2 E1 E

N

1

Nd

A

CP

L1

c

A1

α

L

QFP-A

Note: Drawing is not to scale.

166/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Table 148. TQFP80 – 80-lead Plastic Thin, Quad, Flat Package Mechanical Data

mm

Min

–

inches

Symb

Typ

–

Max

1.60

0.15

1.45

0.27

0.20

–

Typ

–

Min

Max

A

A1

A2

b

–

0.063

–

0.05

1.35

0.17

0.09

–

0.002

0.006

1.40

0.22

–

0.055

0.009

–

0.053

0.057

0.007

0.011

c

0.004

0.008

D

14.00

12.00

9.50

14.00

12.00

9.50

0.50

0.60

1.00

3.5

0.551

0.472

0.374

0.551

0.472

0.374

0.020

0.024

0.039

3.5

–

D1

D2

E

–

E1

E2

e

–

L

0.45

–

0.75

–

0.018

–

0.030

–

L1

α

0°

7°

0°

80

20

–

7°

n

80

20

–

Nd

Ne

CP

–

0.08

–

0.003

167/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

PART NUMBERING

Table 149. Ordering Information Scheme

Example:

uPSD

3

2

3

4

B

V

–

24

U

6

T

Device Type

uPSD = Microcontroller PSD

Family

3 = 8032 core

PLD Size

2 = 16 Macrocells

SRAM Size

3 = 8K bytes

Main Flash Memory Size

3 = 128K bytes

4 = 256K bytes

IP Mix

2

A = USB, I C, PWM, DDC, ADC, (2) UARTs

Supervisor (Reset Out, Reset In, LVD, WD)

2

B = I C, PWM, DDC, ADC, (2) UARTs

Supervisor (Reset Out, Reset In, LVD, WD)

Operating Voltage

blank = V = 4.5 to 5.5V

CC

V = V = 3.0 to 3.6V

CC

Speed

–24 = 24MHz

–40 = 40MHz

Package

T = 52-pin TQFP

U = 80-pin TQFP

Temperature Range

1 = 0 to 70°C

6 = –40 to 85°C

Shipping Option

Tape & Reel Packing = T

For other options, or for more information on any aspect of this device, please contact the ST Sales Office

nearest you.

168/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

REVISION HISTORY

Table 150. Document Revision History

Date

Version

Revision Details

November 2002

1.0

First Issue

Updates: product information (Figure 3, 4, Table 1, 2); port information (Figure 17, 18,

Table 30); interface information (Figure 30, Table 44); remove programming guide; PSD

Module information (Figure 50, 51, Table 85); PLD information (Figure 58, 59, Table 91,

92, 93); electrical characteristics (Table 118, 119, 135, 136)

27-Feb-03

1.1

02-Sep-03

04-Feb-04

05-Jul-04

04-Nov-04

1.2

2.0

3.0

4.0

Updated references for Product Catalog

Reformatted; corrected mechanical dimensions (Table 148)

Reformatted; added EMC characteristics (Table 109, 110, 111)

Updates according to data brief change request (Figure 3, 4; Table 1, 2, 116)

Table 151. Device Functional Change History

Functional Change

After Date Code 0242

Date Code 0242 and before

An 8-bit, Programmable PWM 4 channel

and the associated registers are added.

Only PWM0-PWM3 channels are

available.

PWM Block

When DDC is disabled, the data space

FF00h-FFFFh assigned to DDC SRAM is

available for external data mapping. The

SWENB Bit definition in the DDCON

Register is modified.

Data space FF00h-FFFFh is dedicated to

DDC SRAM.

DDC SRAM Mapping

USB Reset Function

1. Option to block USB generated reset

from resetting the MCU/PSD modules.

USB-generated reset always resets both,

the USB and the MCU/PSD modules.

2. Allow USB Reset Flag (RSTF) to

interrupt MCU.

3. Add RSTE and RSTFIE Bits to the

UIEN Interrupt Enable Register.

Note: Date Code is the 6th to the 9th digit of the Trace Code on top of the device.

169/170

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences

of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted

by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject

to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not

authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics.

All other names are the property of their respective owners

STMicroelectronics group of companies

Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -

Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America

www.st.com

170/170


型号：	UPSD3233A-24T6T
厂家：	ST
描述：	Flash Programmable System Devices with 8032 Microcontroller Core 闪存可编程系统设备与8032微控制器内核闪存微控制器和处理器
文件：	总170页 (文件大小：2708K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UPSD3233A-24T6T [STMICROELECTRONICS]

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