I didn't read all of the discussion so perhaps I'm
completely wrong here.

Could it be latch-up by one supply comming up before
another , do the analog sources have a powersupply
that is up and running before the logic supply. 

Just a thought

Peter van Hoof

--- alan smith <micro_eng2@yahoo.com> wrote:

> I'm not discounting firmware yet, other than I have
> two boards that have NO issues at all, while two
> others do.  And I can take a chip from one board,
> drop into the other and it works just fine.  Thats
> why I am looking for some sort of external stimuli
> that would be present on the bad boards and not the
> good, but the question is....what to look for that
> might cause such a condition.
> 
> Olin Lathrop <olin_piclist@embedinc.com> wrote:alan
> smith wrote:
> > So, making a long story short....anyone ever seen
> where the PIC A/D
> > gets "stuck" on a certain value and doesn't want
> to change?
> 
> I have never seen this. It sounds like a firmware
> bug.
> 
>
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