Matrix user forums

I need to program a 44-pin TQFP. I have a socket and can jumper wires over to the DIP sockets on my PICMicro V3 board. Exactly which pins are necessary for programming, besides supply & gnd? I'm programming the bootloader on the 18F4550.

Thanks,
Carl

Hello Carl

The standard ICSP (In Circuit Serial Programming) circuit includes the MCLR, VDD, VSS, RB6, RB7 and also the Low Voltage Programming Pin if required. There should be tonnes of schematics for this available. Try googling "PIC ICSP Schematic"

Thanks, I particularly wanted to know about the PICmicro board, which I assumed followed the normal ICSP method, but wanted to be sure. I've misplaced my CD which has the schematic on it, and the one on-line did not have enough resolution to follow.

Hello

Yes just the normal pins are used. If you want you can use the expansion dil header to take the connections to your external board. You will have to keep the connections relativly short (approx 5-15cm) for the programming to work correctly.