James wrote... >I am laying out a new board for a PIC 18F452 project. I have never used >an in circuit debugger before. Are there a special set of pins that are >used for this? If can these same set of pins be used simultaneously >with normal input sources? Best thing for you to do is go to the Microchip web site and download the documentation at http://www.microchip.com/1010/pline/tools/picmicro/icds/icd2/index.htm The materials there will answer all your questions. In brief, ICD for the PIC18F series requires access to VCC, GND, MCLR, RB6 and RB7. Hope this helps a bit... Dave D. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.