Aaeon AEC-6872, 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 7 2
Appendix A Programming the Watchdog Timer
A-5
01h: Time-out occurs after 1 second/minute
02h: Time-out occurs after 2 second/minutes
03h: Time-out occurs after 3 second/minutes
…………………………………………………..
FFh: Time-out occurs after 255 second/minutes
CR F7h. (WDTO# Control & Status Register; Default 00h)
BIT READ/WRITE DESCRIPTION
7 R/W
Mouse interrupt reset watch-dog timer enable
0: Watchdog timer is not affected by mouse interrupt.
1: Watchdog timer is reset by mouse interrupt.
6 R/W
Keyboard interrupt reset watch-dog timer enable
0: Watchdog timer is not affected by keyboard interrupt.
1: Watchdog timer is reset by keyboardd interrupt.
5 Write “1” Only Trigger WDTO# event. This bit is self-clearing.
4
R/W
Write“0”Clear
WDTO# status bit
0: Watchdog timer is running.
1: Watchdog timer issue time-out event.
3~0 R/W
These bits select IRQ resource for WDTO#. (02h for
SMI# event.)