PICkit 2 won't program with crystal in application circuit

[Peter S. May]

Howdy, folks --

I have an application circuit set up for a PIC 16F88 clocked by a 20MHz
crystal (with a 15pF cap between each crystal lead and ground). The
application circuit will only work with the crystal attached, but the
PICkit 2, the programmer I'm using, will only see the PIC if I detach
the crystal.

Anyone heard of this happening before?

Thanks
PSM

 

[Jochen Rapp]

Hi,
For Programming you need RB6, RB7 und MCLR
what have you connected to these Pins

Regards
Jochen