>Why do 16F877's have 2 sets of VCC & Ground pins? Heat sinking? Ground
>bounce capacitor? If there isn't a good reason, another couple Port A or E
>pins would be nice.

How about to seperate the VCC to the A/D convertor section? This would reduce
the vulnerability of the A/D to supply noise and ground bounce problems.

Another possibility would be to deal with the possible currents involved in the
I/O pins if they are driving devices that require current capability (like TTL,
LEDs, etc)

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