Advantech AIMB-270 Manual do Utilizador descarregar pdf (Página 88)

AIMB-270 User Manual 76

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

Dec dx ; Lock W83627DHG-P

Mov al,0aah

Out dx,al

5. Generate a time-out signal without timer counting

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

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 ; Generate a time-out 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 W83627DHG-P

Mov al,0aah

Out dx,al

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Advantech AIMB-270 Manual do Utilizador Página 88