Advantech PCE-5120 user manual Example Program

A.1.4 Example Program

1.Enable watchdog timer and set 10 sec. as timeout interval ;-----------------------------------------------------------

Mov dx,2eh		; Unlock W83627HF
Mov al,87h
Out dx,al
Out dx,al
;-----------------------------------------------------------
Mov al,07h		; Select registers of watchdog timer
Out	dx,al
Inc	dx
Mov	al,08h
Out	dx,al
;-----------------------------------------------------------
Dec dx		; Enable the function of watchdog timer
Mov	al,30h
Out	dx,al
Inc	dx
Mov	al,01h
Out	dx,al
;-----------------------------------------------------------
Dec dx		; Set second as counting unit
Mov	al,0f5h
Out	dx,al
Inc	dx
In	al,dx
And al,not 08h
Out	dx,al
;-----------------------------------------------------------
Dec dx		; Set timeout interval as 10 seconds and start counting
Mov	al,0f6h
Out	dx,al

85 AppendixA