I have wondered the same thing. For a while, I used a connector that mated with my Microengineering Labs EPIC in-circuit programmer. This was a rather cumbersome 10 pin header. Later, I hacked a 5 pin 0.100" centers adapter. I think the pin order was gnd-RB6-RB7-MCLR-5V, but that is just what I made up. Some MCHIP proggers use a 6 position RJ-6 telephone jack, which I think is kind of cumbersome. I think you are on the right track, using about the smallest jack that can talk to an ICSP programmer. Use a polarized header. Other than that I don't think there is a standard. On a similar note, when you have to use RB6 and RB7 in your circuit, what do people do to isolate them during ICSP? I have considered a jumper, which seems klunky. I understand some programmers drive these pins with an impedance of about 1.75K, so any load on these pins would have to be much higher, say 10K. I could see driving a 10K resistor to the base of a transistor to operate a load of some kind. How have other people isolated RB6 and RB7? --Lawrence ----- Original Message ----- From: "Hazelwood Lyle" To: Sent: Friday, May 17, 2002 6:56 AM Subject: [PIC]: ICSP Connector pinout? Greetings all, I am sending my data off to the board house next week. (thanks to everyone for the eagle pointers!) My layout includes a 5 pin connector for ICSP. I was able to reserve RB6 and RB7 exclusively for this, and I've added a jumper between VCC and VDD so that the chip power can be isolated while in circuit. I am wondering if there is a "standard" order for the pins in this connector. I don't mind making up my own, but if there is a common sequence, I'd prefer to follow it. I'm using a polarized header, AMP 5 pin 0.1" pitch, AMP #641213-5,DK #A23900-ND Thanks, Lyle Hazelwood -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads