Hi,

As discussed few weeks ago, unused ports can be programmed as output and
be left unconnected.  Connecting it to ground or Vcc and making it as
input may destroy your PIC if some erronous instructions is executed by
making them (accidentally) as outputs.

regards,
Reggie


Seth Fischer wrote:
>
> I am using PIC16C84
>
> Should unused bits of I/O ports be programed as inputs or outputs?
>
> Should they be tied high, low or left to float?
>
> TIA
> --
> Seth Fischer
> Auckland, New Zealand