> Are you certian that you're running your device within parameters?
> 3-5VDC, 0C to 70C, 10MHz at 3v, 20MHz at 4.5v

5.0V, 22 deg C, 4MHz internal oscillator.  It's an established design, which
has only recently moved to the 16F628 from 16F84.

> You ought to get in touch with your Microchip representative.

I'm working on that too... but the PIClist is sometimes faster... :-)

Thanks,

Nigel



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