A.1.3 Example Program

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

Mov dx,2eh ; Unlock W83627UHG 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 Inc dx Mov al,10 Out dx,al

;-----------------------------------------------------------

Dec dx ; lock W83627UHG Mov al,0aah

Out dx,al

2.Enable watchdog timer and set 5 minutes as timeout interval ;-----------------------------------------------------------

Mov dx,2eh ; unlock W83627UHG Mov al,87h

Out dx,al Out dx,al

Appendix A Programming the Watchdog Timer

59

AIMB-258 User Manual

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Arkon AIMB-258 user manual Example Program