> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of Jinx
> Sent: 16 March 2009 23:36
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC] 18F1320 A/D and Vref+
> 
> So far the response from Microchip Support is that what I've done
> should work if Vcc >= Vref+ and voltages are in spec, which it is
> and they are
> 
> Leaving me feeling a bit insecure. Because I find it hard to believe
> that no one before me has tried and failed to use Vref+ on this PIC

Joe,

If you stick a scope on the Vref+ pin (with reference connected) do you
get a nice stable voltage with the PIC running?

Is there any chance that something in your code is accidently turning
RA3 into an output and driving the reference voltage up?

Cheers

Mike

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