>I think you are right about the MCLR as a CMOS input. I'm surprise about=20
>not needing to deal with all the other unused inputs if I pull down MCLR.
>

You're probably just luck (or unlucky?) that the other inputs aren't=20
floating around, or perhaps you have the weak pull-ups enabled and don't=20
realize it.

As stated before:

Every I/O should be: defined-as-an-output or (defined-as-a-input and=20
(externally-pulled-up or externally-pulled-down or weak-pulled-up)).

One other thing to watch out for: make sure you don't have any inputs=20
defined to have a weak-pull-up and also externally-pulled-down.

-- Bob Ammerman
RAm Systems


--=20
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