Hi, I've just realised that I've wired up all of port B to my=20 application, and that RB5 (PGM), RB6 (PGC), and RB7 (PGD) are also on=20 port B. Not knowing too much about how ICSP works, can I get away with this? My=20 application only receives data from port B, so it's most probably always=20 a high impedance load. Many thanks, Matt. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .