> I had RA3 controlling the SCL line, and analog enabled with RA0, RA1 and
> RA3 set as analog. (ADCON1 set as 04h) RA3 was set as an output, not as
> an input.
>
> This did not work. I turned off the A2D and it did work.
>
> I've now swapped the SCL pin to RC0 and all works OK with A2D enabled.
>
> Anyone know why?

The A/D setting overrides the digital useage of a port on the 16 series.
You have limited selection of A/D inputs and voltage reference inputs in
ADCON1.

The real gotcha is that the A/D wakes up enabled on the earlier 16 series
parts.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, olin@cognivis.com, http://www.cognivis.com

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