enpassant wrote:
>
> I read in a book somewhere that unused microchip pins should be grounded
> to prevent them from "floating".  In the case of the PIC (16F84) should
> unused I/O pins and any other unused pins be tied to ground???  Being
> new with this stuff I'm not sure.  Thanks.

I think you may leave it untied but you should program this pins
as output to avoid current leakage. (in input state this pins are
able to floating and this result to current leakage ability)

You may damage the PIC if you'll tied pins _directly_ to ground and
after that trying to set it output=high (for instance due to mistake
in code)

WBR Dmitry.