how many pins for programming ? | Piclist

A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.

Hi all, I'm trying to lay out an SOIC to DIP adapter board so I can programm 28 pin PICs. By habit, I started trying to connect all 28 pins, but quickly realized that the traces will be all over the place. Using a WARP13 programmer on the 28 pin PICs it seems that I only need programming, not debugging and therfore only need a few traces. I did look over Wouters pages on the Wisp628 http://www.voti.nl/wisp628/ and the chart about halfway down lists the major pin connectons. Do I have to concern myself with any of the other pins ? Programmers like the JDR connect a lot of pins so it baffles me as to what is absolutly required, what is needed and what is just there for no real reason. Can anybody offer some help ? Dave

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The Wisp has additional features. The bare minimum you need for programming is 4 lines: MCLR, Vdd, and the DATA and CLOCK lines. Mike --- In , "Dave Mucha" <davemucha@j...> wrote: > Hi all, > > I'm trying to lay out an SOIC to DIP adapter board so I can programm > 28 pin PICs. > > By habit, I started trying to connect all 28 pins, but quickly > realized that the traces will be all over the place. > > Using a WARP13 programmer on the 28 pin PICs it seems that I only > need programming, not debugging and therfore only need a few traces. > > I did look over Wouters pages on the Wisp628 > http://www.voti.nl/wisp628/ > and the chart about halfway down lists the major pin connectons. > > Do I have to concern myself with any of the other pins ? > Programmers like the JDR connect a lot of pins so it baffles me as to > what is absolutly required, what is needed and what is just there for > no real reason. > > Can anybody offer some help ? > > Dave

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> The bare minimum you need for programming is 4 lines: MCLR, Vdd, and > the DATA and CLOCK lines. On chips that have LVP it is adviseable (required by the specs) to tie the LVP-enable pin low. On chips that can configure /MCLR as input the official enter-programming sequence is Vss-before-Vpp, so Vss is also needed. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products

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Discussion Groups | Piclist | how many pins for programming ?

how many pins for programming ? - Dave Mucha - Mar 13 12:26:00 2004

Re: how many pins for programming ? - upand_at_them - Mar 13 16:03:00 2004

RE: Re: how many pins for programming ? - Wouter van Ooijen - Mar 13 18:33:00 2004