S-35710B01A-K8T2U Datasheet, PDF (12/33 Pages) Seiko Instruments Inc – Low current consumption

FOR AUTOMOTIVE 125°C OPERATION 2-WIRE CONVENIENCE TIMER
S-35710 Series
Rev.1.5_00
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_{__}"_{_}r_{_}e_{__}a_{_} d 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
"0 h" "1 h" "2 h" "FFFFFE h" "FFFFFF h"
Count-up action starts
Count-up action
stops
"0 h" "1 h" "2 h"
Count-up action starts
"0 h" "1 h" "FFFFFE h" _{"FFFFFF h"}
Count-up action starts ^{Count-up action}
stops
"000000 h"
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 (Nch Open-drain Output)
RST
Timer
Wake-up time
register
INT
Timer and wake-up time register
are reset
Timer reset
Timer reset
"0 h" "1 h" "2 h" "FFFFFE h" "FFFFFF h"
Count-up action starts
Count-up action
stops
"0 h" "1 h" "2 h"
Count-up action starts
"0 h" "1 h" "FFFFFE h" _{"FFFFFF h"}
Count-up action starts ^{Count-up action}
stops
"000000 h"
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 (CMOS Output)
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