Aaeon AEC-6821, Manual

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E m b e d d e d C o n t r o l l e r A E C - 6 8 2 1
Appendix A Programming the Watchdog Timer A-15
A.4 W83627EHG Watchdog Timer Initial Program
Example: Setting 10 sec. as Watchdog timeout interval
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Mov dx,2eh ;Enter W83627EHG config mode
Mov al,87h (out 87h to 2eh twice)
Out dx,al
Out dx,al
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Mov al,07h
Out dx,al
Inc dx
Mov al,08h ;Select Logical Device 8 (GPIO Port
2)
Out dx,al
;///////////////////////////////////////////////////////////////////////////////////////////////
Dec dx
Mov al,30h ;CR30 (GP20~GP27)
Out dx,al
Inc dx
Mov al,01h ;Activate GPIO2
Out dx,al