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| HA16113FPJ Datasheet, PDF (2/18 Pages) Hitachi Semiconductor – Dual Watchdog Timers | |||
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HA16113FPJ
Pin Arrangement
P-RUN1 1
24 P-RUN2
Cf1 2
23 Cf2
Rf 3
CR1 4
STBYadj 5
22 RR
21 CR2
20 SW
STBY 6
19 CONT
RES1 7
18 RES2
NMI 8
NMIadj 9
Re1 10
Re2 11
17 CRES
16 VOUT
15 VCONT
14 CS
GND 12
13 VCC
(Top view)
Pin Description
Pin No. Symbol
1
P-RUN1
2
Cf1
3
Rf
4
CR1
5
STBY adj
6
STBY
7
RES1
8
NMI
Function
Input from main CPU to watchdog timer 1 (WDT1)
For connecting capacitor Cf1 to determine WDT1 filter characteristic (frequency band)
For connecting common bias resistor Rf to determine WDT1 and WDT2 filter
characteristics (frequency band), power-on reset time (ton, common to RES1 and
RES2), clock-off time of auto-reset circuits 1 and 2, reset high time (tRH1 and tRH2),reset
low time (tRL1 and tRL2), and reset pulse delay at voltage drop and recovery. Use the
resistor value from 100 k⦠to 500 kâ¦.
For connecting capacitor CR1 to determine ton for power-on reset and toff1, tRH1, and tRL1
of auto-reset circuit 1.
For adjusting standby trigger voltage (insert a resistor between this pin and ground)
Recommended range: VH2 = 2.8 to 4.0 V
Standby signal output
Reset signal output to main CPU
Low-voltage interrupt signal output for memory backup
2
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