Appendix A - Watchdog Sample Code - DFI-ITOX EL109-N User Manual

Appendix A - Watchdog Sample Code

;Software programming example:
;----------------------------------------------------------------
;(1) Enter Superio Configuration mode
;----------------------------------------------------------------
MOV DX,4EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
;--------------------------------------------------------------------------------
;(2) Configuration Logical Device 8, register CRF5/CRF6/CRF7
; (WDT count mode / count value / control mode)
;--------------------------------------------------------------------------------
MOV DX,4EH
MOV AL,07H
OUT DX,AL
MOV DX,4FH
MOV AL,08H
OUT DX,AL
MOV DX,4EH
MOV AL,F5H
OUT DX,AL
MOV DX,4FH
IN AL,DX
OR AL,08H
OUT DX,AL
MOV DX,4EH
MOV AL,F6H
OUT DX,AL
MOV DX,4FH
MOV AL,02H
OUT DX,AL
MOV DX,4EH
MOV AL,F7H
OUT DX,AL
;Ready to Program Logical Device
;Select Logical Device 8
;Select CRF5
;Set CRF5[Bit:3]=1, WDT count mode=Minute mode
;Select CRF6
;Set CRF6 value=02 => Watch Dog Timer=2 (unit:Min)
;Select CRF7
Watchdog Timer
A
95