F u l l - s i z e C P U C a r d
F S B - 8 6 8 G R e v . B
Appendix A Programming the Watchdog Timer
A-6
A.2 W83627EHG Watchdog Timer Initial Program
Example: Setting 10 sec. as Watchdog timeout interval
;///////////////////////////////////////////////////////////////////////////////////////////////
Mov dx,2eh
;Enter W83627EHG config mode
Mov al,87h
(out 87h to 2eh twice)
Out dx,al
Out dx,al
;///////////////////////////////////////////////////////////////////////////////////////////////
Mov al,07h
Out dx,al
Inc dx
Mov al,08h
;Select Logical Device 8 (GPIO Port
2)
Out dx,al
;///////////////////////////////////////////////////////////////////////////////////////////////
Dec dx
Mov al,30h
;CR30 (GP20~GP27)
Out dx,al
Inc dx
Mov al,01h
;Activate GPIO2
Out dx,al
