Post by thread:In circuit programming problems.

Any ideas as to what the best programmer is for in circuit programming? I have a design that is having trouble with in circuit programming using the picstart 16C. I use a '73A. Rb6 and Rb7 have 20K ohm between them. They also drive the input of a 5V logic chip. I've put a fast buffer on Vpp and Vdd. Still the Picstart 16C errors out after a adress or two. I've tried the picstart plus and it's worse. It won't even blank check the parts. (I just love destroying all these OTP parts! :-) I suspect that the long leads and parasitic effects are causing the pic to miss data on the Rb6/7 pins. The Picstart seems to be pushing some of the clock pulses fast to make up time, I figure those are the ones that are not getting through. Does anyone know what programmers would be a bit slower in the clock and data timing? Or has anyone sucessfully slowed down a Picstart 16C? At this stage in the game I would be happy to buy any programmer that would pull it off. TIA -Otmar- ----------------------------------------------------------------------- Otmar Ebenhoech Electric Vehicle Components Ltd. "I wish I die sleeping like my grandfather, not screaming in terror like his passengers." spam_OUTOtmarTakeThisOuTEVCL.com (415) 494-9255 -----------------------------------------------------------------------