Advantech PCE-7214, Руководство пользователя

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63 PCE-7214 User Manual
Appendix A
P
rogramming
the
W
atchdog
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 W83627UHG
Mov al,0aah
Out dx,al
4. Enable watchdog timer to be reset by keyboard
;--------------------------------------------------------------------------------
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
; 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