>
>
> It might take a little care, but hardly boogieman category is it ? After
> all, the PIC is within Vcc limits, there's no reset, etc. You could even
> ramp up/ramp down the voltage, but I don't see that being necessary.
> With a suitable low-leakage (essential for battery apps) reservoir cap,
> perhaps a small series resistor as well to limit charge current, it seems
> to me that Vcc could be varied quite painlessly


There's an implied assumption that VCC is a stable voltage.
I've never tried (for example) VCC as a sine wave added to an offset so that
it was always inside the limits, but varying.

I'd want some feedback from the chip vendors before trying something like
that.
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