68764C

[Carl Summers]

Terryk wrote:
> 
> I think I blew that one. I checked some stuff and it appears to be a 64k
> eprom. "Appears" is the operative word there.
> 
> My programmer from Needham (EMP) will program those.
> 
> I found only one vague references in some docs that it is a 25V(Vpp) /
> 6V(Vcc) eprom.
> 
> Can you read the part? If so, you should be able to burn it with those
> values above. Try using a 50 mS algorithm.
> 
> It a very old part.
> 
> What is the ECM number? Is it an old 6455? or 6025?
> 
> Regards
> 
> Terry

Terry,
It is a 1226026 computer,,and no I can't read it yet,,,,but I might have
"smoked" this one already,,,,,still trying..
Thanks, Carl Summers
> ----------
> > From: Carl Summers <InnovativeTechnologies at worldnet.att.net>
> > To: diy_efi at efi332.eng.ohio-state.edu
> > Subject: Re: 68764C
> > Date: Saturday, December 13, 1997 5:11 PM
> >
> > Thanks Terry,
> > If I change the pin locations can I read and program as a 2732 if so at
> > what voltage? or should I buy an eprom burner that will do
> > motorola??????
> > Thanks again
> > Carl Summers
> >
> > Terryk wrote:
> > >
> > > I think it is the same as the 87S180 or a larger derivative.
> > >
> > > A few pins are swapped.
> > >
> > > Pins 18 and 19 to 12 (VSS)
> > > Pin 20 of prom to 17 of 2732
> > > pin 21 of prom to 20 of 2732
> > >
> > > The other pins match the 2732.
> > >
> > > I blew several of these out trying to read them as standard 2732's so
> be
> > > careful.
> > >
> > > TK
> > >
> > > ----------
> > > > From: Nicole Lacasse <InnovativeTechnologies at worldnet.att.net>
> > > > To: diy_efi at efi332.eng.ohio-state.edu
> > > > Subject: 68764C
> > > > Date: Saturday, December 13, 1997 3:12 PM
> > > >
> > > > Does anyone have any info on how to read this chip? I think its made
> by
> > > > Motorola.....for an 84 vette.....my eprom burner doesn't seem to have
> > > > the settings......Thanks,  Carl Summers