Hope this is not an FAQ. ICD manual does not say anything about this. I'll be using the ICD pins as switch inputs with 100ohm serial resistor, pull up resistor (4K7), 5V1 Zener, 10nF cap. Do I need to disconnect these for when I want to program/debug? I guess RB6..7 will be ok as it is data (above is my standard filter for input lines). What about RB3? Also, I always use a 10microF and 10K for my MCLR as startup reset. Will this affect the VPP? Thanks Quentin -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads