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Appendix A Programming the Watchdog Timer A-6

A.2 W83627EHG Watchdog Timer Initial Program

Example: Setting 10 sec. as Watchdog timeout interval

;///////////////////////////////////////////////////////////////////////////////////////////////

Mov dx,2eh ;Enter W83627EHG config mode

Mov al,87h (out 87h to 2eh twice)

Out dx,al

;///////////////////////////////////////////////////////////////////////////////////////////////

Mov al,07h

Out dx,al

Inc dx

Mov al,08h ;Select Logical Device 8 (GPIO Port

Out dx,al

;///////////////////////////////////////////////////////////////////////////////////////////////

Dec dx

Mov al,30h ;CR30 (GP20~GP27)

Out dx,al

Inc dx

Mov al,01h ;Activate GPIO2

Out dx,al

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