Andre Abelian wrote:
> I use 18F2520, 18F4520 . PIC has internally generated voltage reference
> 1.2v and
> has LVDIF. You can choose different voltage to cause interrupt I use
> this to detect low battery.

I hadn't noticed this module before.  It does look useful for finding that
the battery voltage is getting low.  While it can give you some information
on the Vdd voltage, it's not very accurate since you can only find out
whether it's above or below 15 preset thresholds.  That's not much use in
correcting a 10 bit A/D reading to the current supply voltage, which is what
the original question was about.


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