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watchdog Timer

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kinjalgp

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Watch dog timer is a count-down timer which when reaches a zero count resets the CPU. This is enabled when the controller is entering a critical processing stage where there are chances of hanging or jumping to any arbitrary address. If something goes wrong in this execution stage, after pre-determinded time, watchdog will reset the CPU.

If execution is finished without problems, watch-dog is disabled at the end.

I don't know if 68HC11 has a WDT. Check it out.
 
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