[Diy_efi] Re: looking for help with a prom N82S181
ludis at cruzers.com
Fri Nov 12 06:42:44 GMT 2004
Steve Ravet wrote:
> > Pin 19 (a10 on the 2716) which I was saying was noise - isn't
> > is it? Now
> > from what Steve was saying, and please correct me if I am
> > wrong, is that only half of the signal is usable? When at
> > Vcc ok, but when at Gnd I am going to have a problem when
> > hooked to a 2716 eprom. So only half of the time this signal
> > would be usable. Is that what was being said? So this
> > signal is of no use to me with the 2716. Instead wire it to
> > Vcc, or Gnd depending on which bank I want all my reading to
> > be done from.
> Looks like a clock to me, but I don't know why a clock would be connected to a chip enable.
It might be the E clock. It is common in 68xx and 65xx designs to
include this in the chip select logic. This insures that the device is
only driving the bus when the address is stable. For a read only
memory, this shouldn't matter much.
Ludis Langens ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies: http://www.cruzers.com/~ludis/
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