> What I mean is to do it thru a resistor, not directly. That can save your
> pic from an unfortunate firmware mistake.

We all agree that such resistors serve a purpose. The question is 
whether that purpose is balanced by the cost (cost in a very broad 
sense). Anyone who gives a simple cover-all-cases 'yes' or 'no' answer 
to such a question is IMHO not an engineer. The good answer(s) are about 
the cases in which the answer should be yes, the cases in which the 
answer should be no, and in particular about the interesting gray land 
in between.

-- 

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

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