piclist 2002\10\20\202204a >
Thread: SX programmer
www.piclist.com/techref/ubicom/devprogs.htm?key=sx
picon face BY : stanton54KILLspam@spamEARTHLINK.NET



> >  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
frequency
and 111 is the maximum. Each step is 3% so it's probably off quite a
bit.
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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