User`s manual

MANO110 Series Mini ITX Board User’s Manual
Watchdog Timer
57
Watchdog Timer Register
Index Port (2E hex)
Data Port (2F hex)
Description
87 hex
---
Unlock Super I/O.
Two successive
writes of 87 hex be
applied to 2E hex.
2B hex (F71863)
Bit 4
Select WDTO pin
function.
1: WDT Output.
0: GPIO14.
07 hex
07 hex
Select register of
watchdog timer
30 hex
Bit 0
Write 1 to enable
watchdog timer.
Disable is write 0.
F0 hex
Bit 7
Write 1 to enable
WDTO# output
F5 hex
Bit 3
Write 0 set second
as counting unit.
Write 1 is minute.
F5 hex
Bit 5
Write 1 counting
enable
F5 hex
Bit 4
Write 1 Output
mode pulse
F5 hex
Bit 0:1
1: 25 ms pulse
width