- for ringing include series resistors, maybe 220 ohm or so
- you say some pins are common (rb6,7?), are you sure the other PICs
don't mess with these lines?
- maybe use a programmer that is more suite to ICSP than PS+ (lower
impedance drivers)
- do you pull the LVP pins down?
- what is still on the /MCLR when you have removed the jumper?

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products



> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Chris Loiacono
> Sent: Friday, March 07, 2003 10:47 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: ICSP anyone?
>
>
> Does anyone have more than a basic grasp of PIC ICSP? I have
> a new board in
> front of me with several TQFP & SOIC flash PIC's -
> (hopefully) set up for
> programming each individually thru my PICStart+ with an
> adapter cable I made
> for the occasion.  It worked well on the breadboard but not so on my
> finished board. I can scope the clock, data and 13V on/MCLR,
> but MPlab says
> the chip isn't blank when starting and fails every time.
>
> 4 of the 5 pins required for programming stay common among
> the PICs, but the
> /MCLR pins are isolated thru shunt jumpers.
>
> The clock & data signals from the programmer show as rining pretty
> badly.....what else might I consider???
>
>
> Hence, I am here begging for any clues, help, etc....
>
> Chris
>
> --
> 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