re: Vpp

   Tumar, Vpp is the programming voltage. This is typically applied to
the MCLR pin.

   - Tom

At 10:58 AM 7/24/97 +0300, you wrote:
>  Vdd is power supply , Vss is ground but what is Vpp ?? It is in the
>documents of Serial Programming a Pic16C84 . A pin of Pic chip ???
>