Appendix A - Watchdog Timer - DFI CT132-BR User Manual

A
Watchdog Sample Code
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
MOV
OUT
MOV
MOV
OUT
MOV
MOV
OUT
MOV
IN
OR
OUT
MOV
MOV
OUT
118
DX,4EH
AL,07H ;Ready to Program Logical Device
DX,AL
DX,4FH
AL,08H ;Select Logical Device 8
DX,AL
DX,4EH
AL,F5H ;Select CRF5
DX,AL
DX,4FH
AL,DX
AL,08H ;Set CRF5[Bit:3]=1, WDT count mode=Minute mode
DX,AL
DX,4EH
AL,F6H ;Select CRF6
DX,AL