On January 29, 2006 11:18 am, John Nall wrote:
> This is kind of picking up where I left off some time ago, when I was
> asking if the Wisp628 would program a one-time-programmable EPROM
> chip, and Wouter responded that it would not, because it couldn't
> supply the amount of current necessary.  Someone else chimed in, Olin
> I believe, that C chips were evil in any case and  that I should
> stick with flash chips.

Evil C chips, now that is interesting to hear.
Probably a couple of errata that got corrected later with the F series 
chips. In other words, if you don't have chips, it is recommended you 
get the latest chips, which are F series instead of messing around with 
older stock which are eventually going to get phased-out of production.

> OK, I accept both of those things.

First, expect less help, because you ignored good advice.  ;-P

> However,  there is still a nagging question:  If I do, in spite of
> good advice, want to play around with a C chip, what is the best way
> to program it? Will an ICD2 do that as a matter of course?

Some C chips need to be programmed in parallel fashion, therefore have 
to be physically out of the circuit to program so they cannot be 
programed in-circuit. You will need to read the microchip website 
documentation for programming those chips you have in question. Some 
can be programmed serially, others cannot. Plus the programming 
voltages/currents/etc are different.

> Will Olin's EasyProg do it?  

If the programmer you have does not specify it can handle a C, then it 
is likely it won't, so don't expect it to magically work. This means 
you have to read the documentation for what the programmer can and 
cannot program.

> Would I have to build some sort of parallel programmer?  What is the
> best way?

Sounds like just a personal project, and you probably got to build your 
own programmer or buy a picprogrammer that can handle them.
You might want to go to google and enter these 3 search words:
pic16c programmer schematic

>From that search, this random page appeared interesting:
http://www.jdm.homepage.dk/newpics.htm
...but it was the 1st page I looked at.

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