Questions about a PIC's programmer

[chui]

here it is:
**broken link removed**

I don't understand why there are two saperated parts? what is CN2 for?
thanks for any help.

 

[Nigel Goodwin]

here it is:
**broken link removed**

I don't understand why there are two saperated parts? what is CN2 for?
thanks for any help.

CN2 is (as labelled) an ICSP socket (In Circuit Serial Programming), which you can use to program the chip in it's final board - assuming you design the board accordingly!.

 

[Pommie]

This is not a good design for a programmer. Circuits that derive there power from the serial port tend not to work with modern PCs. Have a read of this page for example circuits and explanations of how they work etc. There is also a FAQ.

Mike.

 

[blueroomelectronics]

I noticed there are clamp diodes on PGC & PGD. Aren't these already internally clamped on the PIC?
**broken link removed**

 

[Pommie]

They are indeed internally clamped. Well spotted.

To the OP, you should also consider an In Circuit Debugger as supplied by William above on his website.

Mike.