Peter Onion wrote :

> I could be totally missing the point here, but looking at the
> data sheet I think the internal reference in only 3v ?  So
> inputs greater than this give f.s.d. (0x3f) I think.


I don't think there even *is* an internal V-ref for the ADC.
It can use Vdd or an *external* V-ref.

Are you sure you aren't thinking of the V-ref for the LVD ?

Jan-Erik.

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