Jan-Erik Soderholm wrote:


>
> > What is your oscillator config ?
> Any 100 nF cap near the PIC ?
> Any I/O pins configurated as inputs but left unconnected ?
> How is MCLR connected ?
> Anything else you haven't told us ?


.
1.  The oscillator config is a 10 MHz resonator, between OSC1 and OSC2.
Center pin grounded, and of course the resonator has built-in 22 pf
capacitors to ground.

2.  There were not any 100 nf caps from Vdd to Vss.  I have now put them in,
as suggested by Olin Lathrop.

3.  All unused I/O pins are configured as output.

4.  MCLR is tied through a 10K resistor to +5 volts.

5.  I have told you everything that I think is significant, but of course
Murphey's Law says that I have forgotten to tell you something crucial.  :-)

I'm going to let it run awhile with the 100 nf capacitors put in and see if
it fails again.

(Since no one told me whether or not this sounded like oscillation, I guess
it must have).

Bill
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