Alan Pearce wrote

Subject: RE: [EE] Eproms dont burn!!


>> >>It seems to me that the one thing that changed was "reloading the
> library
>> >>on the Dataman S4"
>>
>> It's starting to look like that is where the problem lies, I just dont
> know
>> what to do about it. I have reloaded the 'Library' a couple of times
> since,
>> and while it reloads with no problem and shows all the different chip
> types
>> in it's memory etc  ...  still no go.
>
> You are selecting the correct manufacturer from the menu for each chip?
> Even for nominally the same EEPROM different manufacturers do have
> subtly different programming algorithms and voltages.
>
> But that doesn't explain why the chips apparently program and verify.
>
> I would be tempted to load the master chip, read a few locations writing
> down the contents. Now turn off the programmer, power back on and read a
> failing chip. Do the memory locations read the same?
>

Both good questions Alan  ...   yes I have been making certain I was=20
selecting the correct manufacturer and programming 'profile' for each=20
individual one.

I had been going to try your second suggestion, but hadn't worked out how t=
o=20
look at each location. I'll check the manual and do that.

Regards,   Roger

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.