>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. > > Yep it is a good idea to this. Especially if you are not using all pins on one port and you are reading the port and masking off bits by ANDing . You can make them in or ouput but I usually make unused pins all inputs and tie them HI.