The 'L' is for low power. I believe the programming specs are the same. -n. -----Original Message----- From: "Adam Stambler" To: "Microcontroller discussion list - Public." Sent: 3/15/2007 10:27 PM Subject: Re: Pickit 2 In circuit programming Hmm. I was just looking over my circuit and realized I used a PIC 18LF4450 instead of the PIC 18F4550 that I should have. (ARG!!!!!) Could that be causing my programming problems? Can the pickit 2 handle an LF part? I am not even sure what that L means. Thanks again, Adam On 3/15/07, Peter van Hoof wrote: > > Adam Stambler adasta@gmail.com wrote: > >Hi, I just finished finished putting together my first in-circuit > >programmable PCB board and my first circuit with any 18f series chip. > > >However, when I plugged my Pickit 2, it could not find the chip. Did > check > >my soldering and I think all the connections are good. > > >Now I am wondering if I made a mistake with how I connected the ICSP > jack. > > >This http://i166.photobucket.com/albums/u83/adasta/usbrocketschematic.png > >is the schematic. Does this look right? > > >Thanks for any help. > > >Cheers, > >Adam > > The 330ohm pullup on the MCLR line is way too low, should be a 27k or so > It's a little confusing to use VCC and VDD for the same wire. > for the rest it looks good > > TTYL > Peter van Hoof > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist