>Does anybody know if the internal oscilator calibration for a 12C5XX can
>be restablished (rewritten) from inside a program, and not just at
>StartUp?

>I am having a problem when starting up the PIC, this value seem to be
>corrupted sometimes. I have a timed signal coming out of one pin, and the
>period of the signal varies if I switch the supply on and off fast.

I had a problem with the oscillator on a 12C508 chip at 3V and people here
suggested to me to erase the chip for a long time since the 5V programmer
will detect a blank chip before a 3V circuit thinks it's blank.


anthony.tekatch@sympatico.ca