Advantech AIMB-281, User Manual, Page: 92 / 98

AIMB-281 User Manual 78
;-----------------------------------------------------------
Dec dx; Lock NCT6776F
Mov al,0aah
Out dx,al
5. Generate a timeout signal without the timer counting
;-----------------------------------------------------------
Mov dx,2eh; Unlock NCT6776F
Mov al,87h
Out dx,al
Out dx,al
;-----------------------------------------------------------
Mov al,07h; Select the watchdog timer registers
Out dx,al
Inc dx
Mov al,08h
Out dx,al
;-----------------------------------------------------------
Dec dx; Enable the watchdog timer function
Mov al,30h
Out dx,al
Inc dx
Mov al,01h
Out dx,al
;-----------------------------------------------------------
Dec dx; Generate a timeout signal
Mov al,0f7h
Out dx,al; Write 1 to Bit 5 of F7 register
Inc dx
In al,dx
Or al,20h
Out dx,al
;-----------------------------------------------------------
Dec dx; Lock NCT6776F
Mov al,0aah
Out dx,al