Electronic – Connect PICKit2 to PIC18F14K50

microchipmicrocontrollerpicpickit

I have these two reference images:

PIC18F14K50

and

PICkit 2

and I'm trying to put a 6-pin header on my circuit so that I can easily reprogram the PIC if needed, without having to resolder. (I'm using the surface mounted version of the PIC, but I assume that makes no difference.)

So far, I have PK-pin1 goes to PIC-pin4, PK-pin2 goes to PIC-pin1, PK-pin3 goes to PIC-pin20, PK-pin4 goes to PIC-pin19, PK-pin5 goes to PIC-pin18, but I'm not sure about PK-6?

First of all, if I do this with the header, I will be able to reprogram the PIC in the circuit, right? Or will I need to put a jumper to isolate the PIC from the rest of the electronic components on the board? I will only have caps, resistors and microswitches. I am otherwise not using the MCLR/PGC/PGD pins at all.

And secondly, do I need to use the PICKit pin6 for anything?

Thanks

Best Answer

In your case you can leave pin 6 of the PICkit unconnected. You wont need it. Pin 6 is, as far as I can remember, for devices that need a special codeword to get into programming mode.

You dont need to seperate the programming circuit from your rest of the circuit, when you follow some rules (See Section 3 of the PICkit 2 manual):

  • You should take care, that the "VPP voltage slew rate is not slowed down". So dont put big capacitors on the reset pin or you will get in trouble.
  • The signals of the PGD and PGC pins shouldn't be affected. The manual of the PICkit suggest the use of some resistors to isolate your signal (see the figure below, taken from the manual). But this depends heavily on your external circuit.

Typical Application Circuit

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