Please ignore my earlier babblings. Note to self: Don't forget that the MCLR/ pin is subjected to Vpp. The DS1233 won't tolerate that high a voltage. It has to be isolated from the pin during ICD use. Sorry, Bob On Wed, 26 Jun 2002 16:23:57 -0700, Bob Barr wrote: >I'm building a proto board to do ICD debugging with a 16F877 and then >switch over to the 16C765 USB chip for the final application. I've put >in a multi-pole switch to select between ICD and normal operation.=20 > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads