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Puzzling reset behavior

2004-03-15 by David VanHorn

I'm seeing this on an M128, but it may pertain to others as well. 

I have the part in sleep, with the CKDIV set to 128, and everything I can, shut down.
When I see a wakeup condition, I would like to jump to reset, but so far, that seems not to work.. However, if I jump to a jmp here loop, and let the WDT do the reset, then it does work. 

On Jmp Reset, I can't really define what's wrong, since I can't Jtag it in that condition, but it seems that some part of the chip doesn't get actually reset without a pulse on the reset line, or a WDT.

Anyone else seen this, or have evidence to the contrary?

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