On Thu, Feb 26, 1998 at 05:26:33PM -0600, Calvin wrote:
> Does anybody know if the internal oscilator calibration for a 12C5XX can be
> restablished (rewritten) from inside a program, and not just at StartUp?

Sure - the oscillator calibration is a writable register - the stored value
is just a movlw instruction in the last word of the ROM. On reset the chip
starts executing from 1FF or wherever, loading the value in W, wraps around
to zero where you need a movwf to store into the OSCCAL register. In your
program code you can store whatever you like into OSCCAL at any time.


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