AXIOMTEK tBOX320-852-FL Series, User Manual

Page: 92 / 102

tBOX320-852-FL Series U
ser’s Manual
Watchdog Timer
84
;Activate WDT:
mov dx,2Eh
mov al,30h
out dx,al
mov dx,2Fh
mov al,01h
out dx,al
;Set Second or Minute :
mov dx,2Eh
mov al,F5h
out dx,al
mov dx,2Fh
mov al, N h ; N =00h or 08h ( See below Note )
out dx,al
;Set base timer :
mov
dx,2Eh
mov al,F6h
out dx,al
mov dx,2Fh
mov al, M h ; M =00h,01h,02h,.....FFh (Hex),Value=0 to 255
out dx, al ; ( See below Note )
;Disable WDT:
mov
dx,2Eh
mov al,30h
out dx,al
mov dx,2Fh
mov al, 00h ;Can be disable at ant time
out dx,al
Note :
When
N’s value is 00h, the time base is set second.
M = 00: Time-out Disable
01: Time-out occurs after 1 second
02: Time-out occurs after 2 seconds
03: Time-out occurs after 3 seconds
FF: Time-out occurs after 255 seconds