S-1411 Datasheet, PDF (19/36 Pages) –

LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
Rev.2.0_00
S-1410/1411 Series
4. 4 Counter reset due to both rising and falling edges detection 2
(S-141xCxx, S-141xFxx, S-141xIxx, S-141xLxx)
VDD
CPOR
CWDT
1234
1234 12 12
1234
30 31 32
12
WDI
WEN
(Active "H")
WDO
Counter reset due to
both rising and falling edges detection Time-out after counter reset
RST
(S-1411 only)
Figure 32
5. WEN pin operation during charge-discharge operation to CWDT pin
When the WEN pin changes from "H" to "L" during the charge-discharge operation to the CWDT pin, the CWDT pin
performs the discharge operation. Moreover, the internal counter which counts the number of times of the
charge-discharge operation for the CWDT pin is also reset.
If the WEN pin changes to "H" again in this status, the CWDT pin initiates the charge-discharge operation.
VDD
CPOR
CWDT
WEN
(Active "H")
WDO
RST
(S-1411 only)
1234
1234
1234
12
31 32
12
Watchdog timer restarts the operation at WEN pin = "H"
Charge-discharge operation is stopped, counter reset
Figure 33
19