User`s manual

109
A
Watchdog Sample Code
MOV DX,4FH
MOV AL,02H ;Set CRF6 value=02 => Watch Dog Timer=2
(unit:Min)
OUT DX,AL
MOV DX,4EH
MOV AL,F7H ;Select CRF7
OUT DX,AL
MOV DX,4FH
MOV AL,02H ;Set CRF7[Bit:7,6]=11, WDT reset by mouse/key-
board interrupt
OUT DX,AL
;-------------------------------------------
;(3) Exit extended function mode
;-------------------------------------------
MOV DX,4EH
MOV AL,AAH
OUT DX,AL