At 08:14 PM 8/14/98 MET, you wrote:
>Hi Folks,
>
>I would like to ask a little ( or great) help.
>I would like to know about the 84,62,71  -ME chips.
>They are 28 pins chips and they are in a downloader.
>I asked the Microchip a few month ago but they doesn't answer yet.
>I suppose they are looking for the answer.
>I think these chips can run the program from a RAM.
>
> Thanks George
>
>

Hi George,

These parts are the bond-out versions of the 84,62,71 or
whatever. The idea is to bring out internal signals for
an In Circuit Emulator or whatever. Otherwise the chips
are the same as the "real" parts.

The obvious signals to bring out would be address and data busses
for the internal program memory so that you could put some external
ram for the program memory.

I suspect that data sheets are around somewhere, although I haven't
seen any. It's the sort of information you would really only need
if you are planning to build an ICE or soemthing similiar.


Ray Gardiner ray@hdc.com.au