Over current problem in pic microcontroller

[Murugesh_89]

Hi,
We have designed a board using pic18f45k22 and produced many boards. Off these some boards (10 out of 100), While programming using the pickit3, showing that over current has detected and can not be programmed.

Why is this problem and what to be done to overcome this issue?

Thanks,
Murugesh

 

[betwixt]

Sounds like the Pickit is trying to power something else as well. Depending on the design of your board, is it possible that you can power it up as normal before programming the PIC? Can you show a schematic of what is wired to the PGC, PGD and /MCLR pins and describe what else is connected to the VDD line.

There are guidlines on how to design for ICSP on Microchips web site and also some useful notes in the Pickit documentation.

Brian.