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 |
|
Inc | dx |
|
Mov | al,10 |
|
Out | dx,al |
|
| ||
Dec dx |
| ; lock W83627HF |
Mov | al,0aah |
|
Out | dx,al |
|
Enable watchdog timer and set 5 minutes as the 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 minute as counting unit |
Mov | al,0f5h |
|
Out | dx, al |
|
Inc | dx |
|
In | al,dx |
|
Or al, 08h |
| |
Out | dx,al |
|
Appendix A Programming the Watchdog Timer
93 |
