AVR-Chat

On 3/14/2010 8:58 PM, Cat C wrote:
> If you're gonna propose a reset chip, or other circuitry to get a reset other ways, why?  This works fine.

I would recommend at least testing with a proper reset chip.

Why?  Simply to try to narrow down the problem.  Problems like this 
worry me, they indicate something going on that is not understood. Such 
things have a nasty habit of coming back in another form avoiding the 
initial workaround.

This 'feels' like a power on reset problem and built-in micro-controller 
power on reset circuits are notorious for having holes in some corner of 
performance.  An external reset chip would eliminate that possibility. 
Leaving a reset chip in the design is open to question, testing with a 
reset chip at his point I would consider mandatory.

My other immediate suspicion in cases like this is initialization code. 
  Although given your experience with this processor family I cannot 
imagine what you could be leaving out (and I have no suggestions to offer).

My best suggestion is to be worried.

Robert



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