tete etertet wrote:
> What is the reason for the voltage reference inputs of
> the ATD module (18f4620) and when should I use them
> (as opposed to simply using Vss and Vdd) ?
> Thanks.
>   
This allows you to direct-connect a source, allowing very accurate 
readings. Helps
a LOT when the PIC is attached to noisy peripherals.

--Bob
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