> Here is my problem....when I test on MPLAB simulator the timing period
if
> fine and correct for a time period of 1 second I get 999.94 mS. But when
I
> programme the JW device the actual timing period is out by 10%. Is this
what
> I should expect?

No.  The internal oscillator is more accurate than that when properly
calibrated.  Remember, you still have to set OSCCAL at the beginning of
your program.  The calibration value is only loaded into W when the
program is at 0 after startup.


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