S-35720C01A-K8T2U Datasheet, PDF (9/21 Pages) Seiko Instruments Inc – Low current consumption

FOR AUTOMOTIVE 125°C OPERATION WITH INTERRUPT TIME SETTING PIN CONVENIENCE TIMER
Rev.1.1_00
S-35720 Series
 INT Pin Interrupt Signal Output
The INT pin interrupt signal output (time-out type) can be selected from one of the following:
• One-shot loop time-out
• Handshake time-out
• Toggle operation^*1
*1. Contact our sales office for the details of toggle operation.
1. One-shot loop time-out
One-shot _{_}lo_{__}o_{__}p_{__} time-out is a type to output the "L" pulse interrupt signal repeatedly from the INT pin.
After the RST pin changes from "L" to "H", the timer starts the operation. Then, the INT pin outputs "L" pulse when
the timer value matches the value set to the SET0 pin and the SET1 pin^*1. After that, the S-35720 Series resets the
timer
If "L"
automatically,
is input to the
a_{_}n_{__}d_{___}r_{_}estarts a count-up action.
RST pin before the timer value
matches
the
value
set
to
the
SET0
pin
and
the
SET1
pin^*1,
the
timer is reset.
*1. 4 types of interrupt time can be selected depending on the SET0 pin and the SET1 pin settings.
Remark The above description is the example of Nch open-drain output product.
In CMOS output product, the INT pin output is the inverse logic of Nch open-drain output product.
RST
Timer reset
Matchs the value set to
SET0 pin and SET1 pin
Timer reset
Timer
Count-up action
Reset
One-shot loop time-out
Count-up action
Timer reset
One-shot loop time-out
Count-up action
Timer reset
Count-up action
Reset
INT
The timer restarts
The timer restarts
The timer restarts
7.8 ms
INT
pin outputs "L" pulse periodically
Figure 8 Output Timing of One-shot Loop Time-out (Nch Open-drain Output)
RST
Timer
INT
Timer reset
Matchs the value set to
SET0 pin and SET1 pin
Timer reset
Count-up action
Reset
One-shot loop time-out
Count-up action
Timer reset
One-shot loop time-out
Count-up action
Timer reset
Count-up action
Reset
The timer restarts
The timer restarts
The timer restarts
7.8 ms
INT
pin outputs "H" pulse periodically
Figure 9 Output Timing of One-shot Loop Time-out (CMOS Output)
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