Greetings All:
Today's Question
What is the best way to treat unused pins on a PIC for absolutely lowest
possible power consumption? (and the theory behind your choice please).

Options are:    output, drive hi, no termination
                output, drive lo, no termination
                input with pullup
                input with pulldown
                input floating (not really an option--pin will oscillate sometim
es)

Some thoughts from my end:
1. Inputs require a pull-up or -down resistor, possibly in the megohm
range, but still some current flow, plus an extra part.
2. Outputs don't require external parts, but with big ground planes and
potential board leakage, driving low might be the best.  However, most of
the programmers I have used tend to drive the pins hi.

So What is the consensus?
kelly
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William K. Borsum, P.E.
OEM Dataloggers and Instrumentation Systems
<borsum@dascor.com> & <www.dascor.com>