User’s Manual
Custom Embedded Solutions
WIN Enterpris es, Inc ., s ales @win-ent.c om
www.win-ent.com
, (978) 688-2000
50
Watchdog Timer Registers
Address of
register (2EH)
R/W
Value (2FH) and Description
87H
-----
Write this address to I/O address port 2EH twice to unlock
the W83627EHG
07H
W
Write 08h to point to logical device 8 and select the register
of watchdog timer.
30H
R/W
Write 01h to activate WDTO#. Disabled is set as default.
CRF5, Bit 3
R/W
Select WDTO# count mode.
0: Second Mode
1: Minute Mode
CRF5, Bit 1
R/W
Enable / Disable the WDTO# output low pulse to KBRST#
0: Disable
1: Enable
CRF6
R/W
Watchdog time-out value.
0: stop timer [default]
01~FFh: Writing a non-zero value to this register causes
the counter to load the value to watchdog counter and start
counting down. The amount of the count, in seconds or
minutes, depends on the value set in register CRF5, bit 3.
This number decides how long the watchdog timer waits
for strobe before generating an interrupt or reset signal.
Writing a new value to this register can reset the timer to
Start the WDT counting
down
Lock
W83627EHG
