Advantech AIMB-270 Manual do Utilizador descarregar pdf (Página 87)

75 AIMB-270 User Manual

Appendix A Programming the Watchdog Timer

Dec dx ; Enable the function of watchdog timer

Mov al,30h

Out dx,al

Inc dx

Mov al,01h

Out dx,al

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

Dec dx ; Enable watchdog timer to be reset by mouse

Mov al,0f7h

Out dx,al

Inc dx

In al,dx

Or al,80h

Out dx,al

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

Dec dx ; Lock W83627DHG-P

Mov al,0aah

Out dx,al

4. Enable watchdog timer to be reset by keyboard

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

Mov dx,2eh ; Unlock W83627DHG-P

Mov al,87h

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 ; Enable watchdog timer to be strobed reset by keyboard

Mov al,0f7h

Out dx,al

Inc dx

In al,dx

Or al,40h

Out dx,al

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 101 102

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Advantech AIMB-270 Manual do Utilizador Página 87

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