1982 ECM Rom type????????

[thergen at svn.net]

MB7132E?

See Ludis's page,
http://www.cruzers.com/~ludis/c3pinouts.html#16006630

Yep, an 82S181 (1kx8) look alike.

Tom

On Tue, 10 Nov 1998, Christian Hack wrote:

> Hiya people,
> 
> While you guys have your PROM data books out you can probably
> help me with another PROM I have found in my Nissan ECU
> It's a Fujitsu MB7132E. A quick search on the web revealed it's
> some sort of programmable device (pretty much all the hits I got
> were device lists for EPROM programmers and the like). I am
> guessing it's a 2732 (4k x 8) look a like at the moment.
> 
> Anyone got any ideas as to why there would be two ROMs/PROMs
> in my ECU? I have the code PROM out and disassembled and I
> can't see any reference to this new PROM at all. One thing I'm
> pretty sure of is that it's not a backup style Memcal thingo which
> the GM computers use since if the main PROM is not there, the
> car won't go at all. There is a fairly large 64 pin ASIC on the
> board, could it possibly be a processor as well?
> 
> Another thing, why a PROM and not a Masked ROM like the main
> CPU code?
> 
> Thanks
> 
> Christian Hack
> christianh at edmi.com.au
> EDMI Pty Ltd
> Ph : (07) 3888 3066
> FAX : (07) 3888 3583
> 
>