User’s Manual
Custom Embedded Solutions
WIN Enterpris es, Inc ., s ales @win-ent.c om
www.win-ent.com
, (978) 688-2000
53
;---------------------------------------------------------------------------------
; Set minute as counting unit
;---------------------------------------------------------------------------------
DEC DX
MOV AL,F5H
OUT DX,AL ; Select CRF5
INC DX
MOV AL,08H
OUT DX,AL ; Set Watchdog time-our to minute mode
;----------------------------------------------------------------------------------------
; Load 2 minutes to Watchdog Counter and start counting down
;----------------------------------------------------------------------------------------
DEC DX
MOV AL,F6H
OUT DX,AL ; Select CRF6
INC DX
MOV AL,02H
OUT DX,AL ; Time-out occurs after 2 minutes
;----------------------------------------------------------------------------------------
; Exit extended function mode
;----------------------------------------------------------------------------------------
DEC DX
MOV AL,AAH
OUT DX,AL
