> > Also try changing the IRCTRIM bits - right now the oscillator is
> > trimmed to the minimum frequency, maybe that's confusing it. It is used
> > during programming.
> You're using ICSXprog.asm in the PIC ? I can see a variable ICTR but
> not IRCTRIM. Am I looking in the right program ?
IRCTRIM is bits 11, 9, and 8 of the SX's FUSEX. 000 is the minimum
and 111 is the maximum. Each step is 3% so it's probably off quite a
The device depends on the internal RC oscillator to provide the 128 KHz
clock used during programming.
Try setting FUSEX to 37C or even B7C.
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