HA16113FPJ Datasheet, PDF(3/18 Page) Hitachi Semiconductor

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HA16113FPJ Datasheet, PDF (3/18 Pages) Hitachi Semiconductor – Dual Watchdog Timers

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HA16113FPJ

Pin Description (cont)

Pin No. Symbol

NMI adj

Re1

Re2

GND

VCC

Vout

CRES

RES2

CONT

CR2

Cf2

P-RUN2

Function

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

pin and Vout or ground)

Recommended range: VH1 = 4.4 to 5.2 V

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)

Ground

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

Input for detecting power supply current

For base control of external pnp transistor

Regulated voltage supplied to microprocessor and IC internal circuits Connect to

collector of external pnp transistor

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

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

NMI output goes high, then after time tr both reset outputs also go high. Times tRES and

tr are adjusted by capacitor CRES inserted between this pin and ground.

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

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

Openâindependent control; connected to groundâsimultaneous control

For connecting capacitor CR2 to determine toff2, tRH2, and tRL2 of auto-reset circuit 2

For connecting bias resistor RR to determine t , off1 toff2, tRH1, tRH2, tRL1, and tRL2. Use the

resistor value from 100 kâ¦ to 500 kâ¦.

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

Input from sub CPU to watchdog timer 2 (WDT2)

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