This does work but maybe I've explained it wrong ... I'll try to draw the schematic in paint. -----Original Message----- From: Wouter van Ooijen [mailto:wouter@VOTI.NL]=20 Sent: donderdag 6 februari 2003 20:49 To: PICLIST@MITVMA.MIT.EDU Subject: Re: pic16F877 Reset question > Hmmm I had an ICSP circuit on my 16F84 and had no problems with that,=20 > I isolated rb6 and 7 with a jumper from my application circuit, and=20 > also the vcc to the icsp connector. The mclr was tied with a diode > and a 10k > resistor to vcc. IMHO that can't work: the diode from MCLR to Vcc will prevent MCLR from rising above Vcc + 0.6V, which is not enough to enter programming mode. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- 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