68705P3 MCU

That should of course be MCUs. :)

I think the answer is no, but there is a very simple schematic available somewhere that allow to connect a 68705P3 and an already programmed Eprom (2764 or so), and the 68705P3 program itself, reading the Eprom. I'm quite sure it was an application note from Motorola.

Robert Lacoste - ALCIOM : The mixed signals experts

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Interesting, thanks. I'll have a look around for the schematic you mentioned, but if anyone knows where to find it please let me know. :)

Cheers

The programmer schematic should be in Motorola's 68705 family manuals

- don't know if those would still be available on Motorola's web site...

Thanks, have looked via a search on '68705' but no result.

The MC68705P3 programs itself from a ROM or EPROM when both are inserted in a special programmer. As someone already mentioned, the schematic for the special programmer is in the Motorola databooks. The circuit is simple, doesn't require a lot of parts. Burning an EPROM in order to program the uC is a pain though. I have the schematic (a rather poor xerographic copy). I'll try to get a usable scan of it. Stay tuned.

That would be great, thanks. :-)

Posted at alt.binaries.schematics.electronic Good luck.

I understand the lure of making use of free parts - I do it a lot myself

- but that old NMOS chip is such a bummer to program (source -> EEPROM

-> uC) that development on it can quickly get to you. I did two projects with the 68705 and got fed up. Moved to flash PICs, first the

Excellent, many thanks. :-)