> >The PIC is operating in HS mode with a 4MHz oscillator.
>
> Are you sure you should be using HS mode? The data sheet
> lists XT mode as
> being correct for 4MHz. This may not be what is stopping your
> application,
> but you could be damaging your crystal by overdriving it.

IMHO the datasheets show HS for >= 4, XT for =< 4, so for 4 both are
acceptable.

Wouter van Ooijen

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