Hi Francesco,

1)When I did ISP for PIC16C73, I connect two Vss to the ground, suggest
you use a om meter to measure the R between two Vdd or Vss, if the R is
equal to short, only one is OK.

2)ISP only need RESET, PB7 and PB6, if you don't connect these pin to
the ground, it should be no problem.

Happy PICing!

Jerry


At 08:38 AM 12/3/97 -0500, you wrote:
>Hello!
>I would really be gratefull if anyone of you guys could answer the following
> two question please?
>
>1) When you program a PIC with two Vdd pins and two Vss pins, do they both
>need to be connected?
>
>2) Still when programming a PIC, what will happen if any of the I/O pins is
>connected to ground?
>
>Long live the PIC!!
>
>Francesco Cembrola
>
>

Jerry Meng, BA1FB

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