HA16113_技术文档

HA16113FPJ

Dual Watchdog Timers

The HA16113FPJ is a multifunction device that provides microprocessor systems with the necessary

regulated power supply, monitors the supply voltage, and generates power-on reset and watchdog reset

signals. It is ideally suited for battery-operated systems such as instrumentation systems.

Functions

•

Regulated power supply

Power-on reset

Two built-in auto-reset circuits

Two built-in watchdog timer circuits (WDT)

Output voltage monitoring (LVI)

Features

•

Simultaneous or independent control of auto-reset outputs.

Precisely regulated output voltage and accurate NMI trigger voltage (both ±2%).

Low-voltage control with NMI, simultaneous RES1 and RES2, andSTBY outputs.

Independently selectable durations for power-on reset and auto-reset: power-on duration is common to

both reset outputs; auto-reset durations can be selected independently.

•

Reset command input pin (CONT) for second reset output (RES2).

WDT filter function detects minimum pulse width and maximum period of P-RUN input pulses.

HA16113FPJ

Pin Arrangement

P-RUN1

Cf1

1

24

23

22

21

20

19

18

17

16

15

14

13

P-RUN2

Cf2

2

Rf

3

R_R

C_R1

4

C_R2

STBYadj

STBY

RES1

NMI

5

SW

6

CONT

RES2

C_RES

V_OUT

V_CONT

CS

7

8

NMIadj

Re1

9

10

11

12

Re2

GND

V_CC

(Top view)

Pin Description

Pin No. Symbol

Function

1

2

3

P-RUN1

Cf1

Input from main CPU to watchdog timer 1 (WDT1)

For connecting capacitor Cf1 to determine WDT1 filter characteristic (frequency band)

Rf

For connecting common bias resistor Rf to determine WDT1 and WDT2 filter

characteristics (frequency band), power-on reset time (t_on, common to RES1 and

RES2), clock-off time of auto-reset circuits 1 and 2, reset high time (t_RH1and t_RH2),reset

low time (t_RL1and t_RL2), and reset pulse delay at voltage drop and recovery. Use the

resistor value from 100 kΩ to 500 kΩ.

4

5

C_R1

For connecting capacitor C_R1to determine t_onfor power-on reset and t_off1, t_RH1, and t_RL1

of auto-reset circuit 1.

STBY adj For adjusting standby trigger voltage (insert a resistor between this pin and ground)

Recommended range: V_H2= 2.8 to 4.0 V

6

7

8

STBY

RES1

NMI

Standby signal output

Reset signal output to main CPU

Low-voltage interrupt signal output for memory backup

2

HA16113FPJ

Pin Description (cont)

Pin No. Symbol

Function

9

NMI adj

For fine adjustment of Vout trigger level for NMI signal (insert a resistor between this

pin and Vout or ground)

Recommended range: V_H1= 4.4 to 5.2 V

10

11

Re1

Re2

For connecting resistor Re1 to determine voltage Vout for microprocessor and IC

internal circuits (insert between this pin and Re2)

For connecting resistor Re2 to determine voltage Vout for microprocessor and IC

internal circuits (insert between this pin and ground)

12

13

14

15

16

GND

V_CC

Ground

Power supply input pin (operating range: 6 to 40 V)

Input for detecting power supply current

For base control of external pnp transistor

CS

V_C

Vout

Regulated voltage supplied to microprocessor and IC internal circuits Connect to

collector of external pnp transistor

17

C_RES

Determines reset pulse delay at voltage drop and recovery. NMI output goes low as

soon as Vout drops below NMI trigger level. If Vout remains below this level for time

t

_RES, both reset outputs also go low. When Vout recovers above NMI trigger level, first

NMI output goes high, then after time t_rboth reset outputs also go high. Times t_RESand

t_rare adjusted by capacitor C_RESinserted between this pin and ground.

18

19

RES2

CONT

Reset signal output to sub CPU

Input pin for resetting sub CPU on command, or when sub CPU crashes Low input at

CONT causes low output at RES2

20

SW

Selects simultaneous control, in which main and sub CPUs are both reset when main

CPU crashes, or independent control, in which sub CPU is reset independently of

main CPU

Open—independent control; connected to ground—simultaneous control

21

22

C_R2

R_R

For connecting capacitor C_R2to determine t_off2, t_RH2, and t_RL2of auto-reset circuit 2

For connecting bias resistor R_Rto determine t_off1, t_off2, t_RH1, t_RH2, t_RL1, and t_RL2. Use the

resistor value from 100 kΩ to 500 kΩ.

23

24

Cf2

For connecting capacitor Cf2 to determine WDT2 filter characteristic (frequency band)

Input from sub CPU to watchdog timer 2 (WDT2)

P-RUN2

3

HA16113FPJ

Block Diagram

16

15

14

13

V_CC

V_OUT

V_CONT

CS

Over

Detection

block

STBYdetection

voltage

detection

block

3.3 k

71 k

—

+

STBY

31.2 k

adj

Re1

NMI detection

Reference

voltage

circuit

10

5

—

3.3 k

block

2 k

Re2

11

36.8 k

80 k

NMI

69.7k

—

+

adj

9

Regulator block

25 k

C_R1

8

6

NMI

4

STBY

Auto-reset circuit 1

19 k

I

2

19*I

RES1

7

8.4 k

3.3 k

Cf1

+

I/6

33 k

—

1

+

20 k

I*4/3

P-RUN1

20

+

C_RES

17

SW

—

Delay circuit block

C_R2

21

RES2

18

3.3 k

Auto-reset circuit 2

24

23

P-RUN2

Cf2

I₁

I₂

12

3

22

19

GND

Rf

R_R

CONT

4

HA16113FPJ

Timing Waveforms

V_BATT

4.7 V

4.6 V (V_NMI

)

4.6 V

4.7 V

4.5 V

Vout

3.0 V (V_STBY

)

NMI

STBY

P-RUN1

Crash

P-RUN2

RES1

t_OFF1

t_RES

t

on

t

r

CONT

RES2

t_RL1

t_RH1

t_OFF1

t_OFF2

t_RES

t

on

t

r

Note: SW pin is connected to ground.

5

HA16113FPJ

Absolute Maximum Ratings (Ta = 25°C)

Item

Symbol

V_CC

Value

Unit

V

V_CCpower supply voltage

CS voltage

40

V_CS

40

V

Control pin voltage

Control pin current

Vout voltage

V_C

40

V

I_C

20

mA

V

Vout

V_PRUN

V_SW

10

P-RUN voltage

SW voltage

Vout

V

Vout

V

CONT voltage

RES current

V_CONT

I_RES

Vout

V

5

mA

mW

°C

NMI current

I_NMI

5

STBY current

I_STBY

P_T

5

Power dissipation^Note

Operating temperature

Storage temperature

600

Topr

Tstg

–40 to +85

–50 to +125

Note: At ambient temperatures up to Ta = 60°C. Derated by 9.8 mW/°C above this point.

6

HA16113FPJ

Electrical Characteristics (Ta = 25°C, Rf = 180 k , Cf1 = Cf2 = 0.01 µF, C_R1= C_R2= 0.1 µF)

Item

Symbol Min

Typ Max Unit Test Conditions

10 15 mA

4.875 5.00 5.125 V

Chip

Power supply current

Output voltage

I_CC

—

Regulator

Vo1

V_CC= 6 to 17.5 V

V_Ccurrent = 5 mA

Vo2

4.80 5.00 5.20

V

V_CC= 6 to 17.5 V

V_Ccurrent = 10 mA

Stability with respect to line Voline

voltage

–50

–100

45

—

75

50

mV

dB

V

V_CC= 6 to 17.5 V

V_Ccurrent = 10 mA

Stability with respect to

load current

Voload

RREJ

Vos

100

—

V_Ccurrent = 0.1 to 15

mA

Ripple rejection

Vi = 0.5 Vrms

fi = 1 kHz

Short-circuit detection

voltage

0.08 0.14 0.20

Temperature coeffi-

cient of output voltage

σVo/σT

Vomax

—

–40

—

ppm/

°C

Maximum adjustable

output voltage

7.0

V

P-RUN1/2

input section

Low input voltage

High input voltage

High input current

Power-on time

V_{IL1, 2}

V_{IH1, 2}

I_{IH1, 2}

t_on

—

2.0

—

25

80

15

40

25

4

—

0.8

—

V

—

V

0.3

40

0.5

60

mA

ms

V

V_IH= V_OL

Watchdog

section (both

RES1 and

Clock-off time (1)

Reset low time (1)

Reset high time (1)

Clock-off time (2)

Reset low time (2)

Reset high time (2)

NMI trigger voltage

t_off1

130 190

R_R: open

t_RL1

20

60

40

6

30

90

60

9

R_R: open

RES2 outputs)

t_RH1

t_off2

R_R: open

R_R: = 75 kΩ

t_RL2

t_RH2

V_NMI

15

20

30

LVI section

4.45 4.60 4.75

25 50 100

Hysteresis width of above V_HYSN

STBY trigger voltage V_STBY

Hysteresis width of above V_HYSS

mV

V

2.70 3.00 3.30

1.35 1.50 1.65

V

RES pulse

delay time

Drop

t_RES

t_r

—

200

—

µs

C_RES= 1500 pF

Recovery

7

HA16113FPJ

Electrical Characteristics (Ta = 25°C, Rf = 180 k , Cf1 = Cf2 = 0.01 µF, C_R1= C_R2= 0.1 µF) (cont)

Item

Symbol Min

Typ Max Unit Test Conditions

NMI output

section

NMI low voltage

NMI high voltage

V_OL1

V_OH1

—

0.4

—

V

I_OL1= 2 mA

V_O1

0.7

—

NMI function initial voltage V_STN

1.0

0.4

—

STBY output

section

STBY low voltage

STBY high voltage

V_OL2

V_OH2

V_STS

I_OL2= 2 mA

V_O1

0.7

STBY function initial

voltage

1.0

RES1/2 output RES1/2 low voltage

V_OL3

V_OH3

V_STR

—

0.4

—

V

I_{OL3, 4}= 2 mA

section

RES1/2 high voltage

V_O1

0.7

RES1/2 function initial

voltage

1.0

CONT and SW Low input voltage

V_IL3

V_IH3

I_IL3

—

0.8

—

V

input section

High input voltage

2.0

V

Low input current

High input current

–120 –60

—

µA

mA

V_IL3= 0 V

V_IH3= V_OL

I_IH3

—

0.3

0.5

—

LVI section

Temperature coefficient of δV_H1/δT

100

ppm/

NMI trigger voltage

°C

Temperature coefficient of δV_H2/δT

—

200

—

ppm/

STBY trigger voltage

°C

8

HA16113FPJ

External Circuit Constant Calculations

Equations for the various functions are given below. C_R1and Cf1 are for RES1. C_R2and Cf2 are for RES2. (Values

given in equations are for reference.)

Item

Equation

Remarks

Vout

Regulated

output voltage

If the desired Vout is 5 V

± 2.5%, recommended

values are Re1 = 1.5 kΩ

and Re2 = 9.1 kΩ

Re2

Re1

HA16113FPJ

Vout = 0.388 ×

+ 2.63

Re1

Iout

Re2

Short-circuit

detection

voltage

V_CS< Iout × R_CS

When this function

operates, V_CONTstops

drawing current from the

base of the external

transistor, so Vout output

stops

R_CS

V_CCC _SV_CVout

Re1 Re2

GND

Maximum

output voltage

Vout Max < 7.0 V

Prevents microprocessor damage that would result if

the output voltage were raised too high by mistake.

The maximum output voltage is fixed.

t_RL

t_RH, t_RL(for

both RES1

and RES2)

Determines the

frequency and duty cycle

of the reset pulse

1

+

t_RH= 3.2× C_R× R’ R’ =

t_RL= 1.1× C_R× R’

1

Rf

1

R_R

RES

Vout

t_RH

t_ON(for both

RES1 and

RES2)

t_ON= 2.2 × C_R× Rf

Sets the time from the

rise of Vout to the

clearing of RES output

t_ON

RES

t_OFF(for both

RES1 and

RES2)

Sets the time from when

P-RUN pulses stop until

the reset pulse is output

1

+

P-RUN

t_OFF= 6.1 ×C_R× R’ R’ =

1

Rf

1

R_R

t_OFF

RES

tr, t_RES(for

both RES1

and RES2)

t_r= 0.75 × C_RES× Rf

_RES= 0.625 × C_RES× Rf

tr sets the time from the rise of NMI to the rise of

RES, when Vout drops by more than the STBY trigger

voltage, then recovers. t_RESis the time from the fall of

NMI to the fall of RES.

t

4.65 V (typ)

4.6 V (typ)

Vout

NMI

t_r

t_RES

RES

9

HA16113FPJ

External Circuit Constant Calculations (cont)

Item

Equation

Remarks

V_NMI

Voltage at which the NMI signal is output when Vout

drops. The NMI trigger voltage and NMI recovery voltage

can be trimmed by connecting resistors between the

NMIadj pin and Vout (R1), and between NMIadj and GND

(R2).

(R1 // 71.7)

(R2 // 25)

V_NMI= 1.2× 1 +

NMI recovery voltage

(V_NMIhigh) is:

V_NMIhigh =

V_NMIhigh

Vout

86.65

R1

86.65

R2 // 25

Vout

NMI

+

+ 1.2

V_NMI

R1

NMI

73.8

R1

NMIadj

R2

1 +

t

(R1 and R2 are in kΩ)

V_STBY

=

V_STBY

Voltage at which the STBY signal is output when Vout

drops. The STBY trigger voltage can be adjusted by

connecting a resistor (R3) between the STBYadj pin and

GND. The STBY recovery voltage cannot be adjusted.

71

1.47× 1 +

31.2 + (36.8 // R3)

V_STBYhigh

Vout

V_STBY

STBY

STBYadj

R3

STBY

t

(R3 is in kΩ)

WDT.

The watchdog timer function determines whether the P-

RUN pulse is normal or not. A reset pulse is output if P-

RUN is determined to be abnormal. The normal region is

the part bounded by Line1 to Line3 (or Line4) in the

diagram. Line4 applies in certain cases, depending on

C_R, Cf, and the state of P-RUN.

0.31×(Du – 24)

Line1 =

×

Cf Rf

Line2 = Du (= 25%)*

0.015

Line3 =

×

Cf Rf

(Hz)

1 – Du

Line1

Line4 =

×

2.1 t_RH

Line5 = 99%*

Du is the duty cycle of the P-RUN

pulse.

Normal area

Frequency

t_RH

Du =

t_RL+ t_RH

Line2

Line3

Note: Line2 and Line5 are fixed.

Line5

(%)

Line4

Duty

10

HA16113FPJ

Operating Interconnections (example)

V_CC

RES

MAIN

CPU

STBY

NMI

PORT

GND Re2 Re1 NMI NMI RES1 STBY STBY CR1

Rf

Cf1 P-RUN1

Cf2 P-RUN2

adj

HA16113

V_CCCS

VC Vout CRES RES2 CONT SW CR2 R_R

SYSTEM

V_CC

PORT V_CC

Batt.

NMI

SUB

CPU

STBY

RES

11

HA16113FPJ

Characteristic Curves

Watchdog timer characteristic

10 k

1 k

Normal area

P-RUN1

P-RUN2

100

R _FC_RC_F

0.01 µF

180 kΩ 0.1 µF

Test circuit

10

0

20

40

60

80 100 (%)

Vout characteristic

5.4

5.3

5.2

Re1 = 1 kΩ

Re1 = 1.5 kΩ

Re1 = 2 kΩ

5.1

Regulated

output

voltage (V)

5.0

4.9

4.8

4.7

I_CONT

5 mA

R_L

V_CCV_CONTV_OUT

HA16113FPJ

Re1

Re2

4

6

8

10

12

14

16

Re2 resistance (kΩ)

12

HA16113FPJ

t

characteristic

on

Vary the external capacitance (C_R) and

resistance (Rf) that determine the t time

140

120

100

80

on

and measure the variation in t

(Same for RES1 and RES2)

.

12 V

on

RES1, RES2

C_R1, C_R2

Cf = 0.22 µF

Rf NMI

Measure with

oscilloscope

t

(ms)

on

60

Cf = 0.1 µF

Cf = 0.047 µF

260

40

20

0

60

100

140

180

Rf resistance (kΩ)

220

t

characteristic

off

400

300

200

100

0

Vary the external capacitance (C_R) and

resistance (Rf) and measure the variation

in t_off. (Same for RES1 and RES2)

RES1

RES2

C_R= 0.22 µF

t

(ms)

off

C_R= 0.1 µF

C_R= 0.047 µF

220 260

60

100

140

180

Rf resistance (kΩ)

13

HA16113FPJ

t_RLcharacteristic

Vary the external capacitance (C_R) and

resistance (Rf) and measure the variation

in t_RL. (Same for RES1 and RES2)

RES1

RES2

60

C_R= 0.22 µF

40

t_RL(ms)

C_R= 0.1 µF

20

C_R= 0.047 µF

0

60

100

140

180

220

260

Rf resistance (kΩ)

t_RHcharacteristic

180

140

RES1

RES2

Vary the external capacitance (C_R) and

resistance (Rf) and measure the variation

in t_RH. (Same for RES1 and RES2)

C_R= 0.22 µF

100

t_RH(ms)

60

C_R= 0.1 µF

C_R= 0.047 µF

20

60

100

140

180

220

260

Rf resistance (kΩ)

14

HA16113FPJ

t characteristic (for both RES1 and RES2)

r

800

600

400

200

0

12 V

RES2

NMI

CRES R ^f

Measure with

CRES = 740 pF

oscilloscope

t (µs)

r

CRES = 1500 pF

CRES = 3300 pF

260

60

100

140

180

220

Rf resistance (kΩ)

t_REScharacteristic (for both RES1 and RES2)

600

500

400

300

200

100

0

12 V

RES2

NMI

CRES R ^f

Measure with

oscilloscope

CRES = 740 pF

CRES = 1500 pF

t_RES(µs)

CRES = 3300 pF

260

60

100

140

180

Rf resistance (kΩ)

220

15

HA16113FPJ

Precautions

If the IC’s ground potential varies suddenly by several volts due to wiring impedance (see figure 7), a false

RES pulse may be output. The reason for this is that potentials in the RES pulse generating circuit change

together with the Vout-GND potential. The reference potential of the comparator in figure 8 and the

potential of the external capacitor have different impedances as seen from the comparator, causing a

momentary inversion. The solution is to stabilize the ground potential. Two ways of stabilizing the IC’s

ground line are:

•

Separate the IC’s ground line from high-current ground lines.

Increase the capacitance (Co) used to smooth the Vout output.

Wiring impedance

SW2

SW1

Co

HA16113FPJ

R_L

V_IGN

Relay or other load

Wiring impedance

Figure 1 Typical Circuit

Vout

V_CCVcont

Wiring impedance

C_RES

RES

+

–

GND

Figure 2 RES Comparator

16

HA16113FPJ

Package Dimensions

Unit: mm

15.8

16.2 Max

13

24

1

12

11.8 ± 0.3

1.12 Max

1.7

0° – 8°

1.27

1.0 ± 0.2

0.15

*0.40 ± 0.08

0.38 ± 0.06

M

0.20

Hitachi Code

FP-24D

JEDEC

EIAJ

Conforms

—

*Dimension including the plating thickness

Base material dimension

Mass (reference value)

0.6 g

17

HA16113FPJ

Cautions

1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,

copyright, trademark, or other intellectual property rights for information contained in this document.

Hitachi bears no responsibility for problems that may arise with third party’s rights, including

intellectual property rights, in connection with use of the information contained in this document.

2. Products and product specifications may be subject to change without notice. Confirm that you have

received the latest product standards or specifications before final design, purchase or use.

3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,

contact Hitachi’s sales office before using the product in an application that demands especially high

quality and reliability or where its failure or malfunction may directly threaten human life or cause risk

of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,

traffic, safety equipment or medical equipment for life support.

4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly

for maximum rating, operating supply voltage range, heat radiation characteristics, installation

conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used

beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable

failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-

safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other

consequential damage due to operation of the Hitachi product.

5. This product is not designed to be radiation resistant.

6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without

written approval from Hitachi.

7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor

products.

Hitachi, Ltd.

Semiconductor & Integrated Circuits.

Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan

Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109

URL

NorthAmerica

Europe

: http:semiconductor.hitachi.com/

: http://www.hitachi-eu.com/hel/ecg

Asia (Singapore)

Asia (Taiwan)

: http://www.has.hitachi.com.sg/grp3/sicd/index.htm

: http://www.hitachi.com.tw/E/Product/SICD_Frame.htm

Asia (HongKong) : http://www.hitachi.com.hk/eng/bo/grp3/index.htm

Japan

: http://www.hitachi.co.jp/Sicd/indx.htm

For further information write to:

Hitachi Semiconductor

(America) Inc.

Hitachi Europe GmbH

Hitachi Asia (Hong Kong) Ltd.

Group III (Electronic Components)

7/F., North Tower, World Finance Centre,

Harbour City, Canton Road, Tsim Sha Tsui,

Kowloon, Hong Kong

Tel: <852> (2) 735 9218

Fax: <852> (2) 730 0281

Hitachi Asia Pte. Ltd.

16 Collyer Quay #20-00

Hitachi Tower

Singapore 049318

Tel: 535-2100

Electronic components Group

Dornacher Straβe 3

D-85622 Feldkirchen, Munich

Germany

Tel: <49> (89) 9 9180-0

Fax: <49> (89) 9 29 30 00

179 East Tasman Drive,

San Jose,CA 95134

Tel: <1> (408) 433-1990

Fax: <1>(408) 433-0223

Fax: 535-1533

Hitachi Asia Ltd.

Taipei Branch Office

3F, Hung Kuo Building. No.167,

Tun-Hwa North Road, Taipei (105)

Tel: <886> (2) 2718-3666

Fax: <886> (2) 2718-8180

Telex: 40815 HITEC HX

Hitachi Europe Ltd.

Electronic Components Group.

Whitebrook Park

Lower Cookham Road

Maidenhead

Berkshire SL6 8YA, United Kingdom

Tel: <44> (1628) 585000

Fax: <44> (1628) 778322

18


型号：	HA16113
厂家：	HITACHI SEMICONDUCTOR
描述：	Dual Watchdog Timers 双看门狗定时器
文件：	总18页 (文件大小：103K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

HA16113 [HITACHI]

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