Programming Delco EPROM's.

[Jeff M]

The Delco EPROM's I have out of a Turbo Grand Prix (using the stock P4)
shows
the following data:

Manufacture:    National Semiconductor
Device Type:    NMC27C256B
Chip Size:        08000h
Vccp:               6.25V
Vpp:                12.75V
Tpwp:              100us

I have used Atmel AT27C256R with same 100us and 13V Vpp as well as
SGS-Thomson M27C256B with same 100us 12.75 Vpp and both have worked well.

Jeff Middaugh
tystorm at email.msn.com




> ><< for Delco EPROM's?, or is not that important.
> > Unfortunately there is not a 'General Programming Algo" in the software,
> so
> > I'm not sure what to specify, AMD, TI ?
> >  >>
> >
> >If memory serves, its Motorola Hex. (Given the Motorola CPU?)
> >
> >Jim
> >
>
> Mmmm, not where I was heading, I meant each manufacturer has a programming
> algorithm for their EPROM's, i.e. AMD recommend 12.75V @Vpp, and
programming
> pulses of 100uS. What about the Delco I.C's?.
>
> Bye
>
> Ross Myers
>