Once again, thanks for you help. Last night I made a 21" cable. I'll try again with the shorter cable tonight. ----- Original Message ----- From: Peter Betts To: Sent: Tuesday, February 20, 2001 5:01 AM Subject: Re: [PIC] 16f84-10p or 04p > As I said I don't have a NOPP programmer but the P16PRO and to program my > PIC16F84's in circuit I need to attach my oscilloscope probes to the > programmming clock and data pins, this would be a few tens of picoFarads I > guess. If I don't do this the extra cable length from my programmer to the > SMD circuit is too much and I get the same error (except the PICALL.exe > application issues the error) > > My extra cable length is only 10cm but it's enough to stop it working. > > I have yet to fully investigate this and suspect this will be cured with the > addition of a 50->100pF capacitor somewhere? Something to simulate the scope > probe loading. > > I don't know if that helps but it's a fine line between programming a PIC > and not in my case and I've found this simple technique does work for me. I > have no problems with DIL chips programmed within the ZIF socket; only when > I program my SMD's on a seperate PCB to my problems start. > > Someone else may be able to explain exactly why but I think it's adjusting > the timing of the signals and maybe filtering some noise off to get it to > work. > > Rgds > > Pete > > > -----Original Message----- > > From: ext mervin [mailto:mervin@MIDSOUTH.RR.COM] > > Sent: Tuesday, February 20, 2001 2:42 PM > > To: PICLIST@MITVMA.MIT.EDU > > Subject: Re: [PIC] 16f84-10p or 04p > > > > > > Peter > > Do you mean you had to increase the size of the c1 & c2 0.1 > > mfd cap or add > > another? > > Did you originally get the same error message? > > "Error: expecting 0x000, found 0x3fff." > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu