WAKE-UP TIMER IC

PROGRAMMABLE WAKE-UP TIMER IC

S-35710 Series

12

1. 2 Read mode

If write operation is not performed to the wake-up time register after the timer starts the operation, the interrupt signal

is not output from the INT pin. The timer stops at "FFFFFF h". The timer value during timing can be confirmed by

reading the time register. This operation is called "read mode".

In order for the timer to operate again, set the RST

_______

pin from "L" to "H" or perform write operation to the wake-up

time register.

RST

Timer

Wake-up time

register

INT

Timer and wake-up time register

are reset

Timer reset

Timer reset

Count-up action starts

Count-up action starts

Count-up action starts

Count-up action

stops

Count-up action

stops

No INT pin interrupt signal output when not writting to

wake-up time register

Figure 14 When Write Operation is not Performed to the Wake-up Time Register (S-35710C01I / Nch Open-drain Output)

RST

Timer

Wake-up time

register

INT

Timer and wake-up time register

are reset

Timer reset

Timer reset

Count-up action starts

Count-up action starts

Count-up action starts

Count-up action

stops

Count-up action

stops

No INT pin interrupt signal output when not writting to

wake-up time register

Figure 15 When Write Operation is not Performed to the Wake-up Time Register (S-35710B01I / CMOS Output)