Advantech ARK-3400, User Manual, Page: 82 / 87

ARK-3400 User Manual 70
D.1 Watchdog Timer
The SCH3114 Runtime base I/O address is 800h
Setting WatchDog time value location at offset 66h
If set value "0", it is mean disable WatchDog function.
Superio_GPIO_Port = 800h
mov dx,Superio_GPI 66h
mov al,00h
out dx,al
.model small
.486p
.stack 256
.data
SCH3114_IO EQU 800h
.code
org 100h
.STARTup
;===============================================================
;47H
;enable WDT function bit [3:2]=11
;===============================================================
mov dx,SCH3 47h
mov al,0ch
out dx,al
;===============================================================
;65H
;bit [1:0]=Reserved
;bit [6:2]Reserve=00000
;bit [7] WDT time-out Value Units Select
;Minutes=0 (default) Seconds=1
;===============================================================
mov dx,SCH3 65h ;
mov al,080h
out dx,al
;===============================================================
;66H
;WDT timer time-out value
;bit[7:0]=0~255
;===============================================================
mov dx,SCH3 66h
mov al,01h