27256 in place of a 2764

David Griffith dgriffi at cs.csubak.edu
Sun Jan 27 21:51:11 CST 2008


On Mon, 28 Jan 2008, Alexis wrote:
> On Sun, 2008-01-27 at 19:37 -0800, David Griffith wrote:
> > Under what conditions can a 27256 be used in place of a 2764?  I have a
> > schematic that calls for the latter, of which I have none, but I have lots
> > of the former.

> Ground the extra address pins and write the data to the lowest 8k of the
> ROM. They are pins 1 and 26.
>
> Make sure the grounded pins aren't attached to anything else on the
> circuit.

I see 1 is Vpp (which won't be used anyhow).  The extra address pins are
26 and 27.  Am I right?

-- 
David Griffith
dgriffi at cs.csubak.edu



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