Vasile Surducan wrote:

>> Is there any way to simulate external devices, like serial EEPROMs or SD
>> cards? MPSIM would be the best but gpsim or other would also do.

> True simulation of any serial programable device can be made only in
> the real world.

"True simulation" in the sense you are using is a contradiction in terms :)

> Mostly because there are small timing differencies between various
> manufacturers products, so even a simulation works, a real connection
> may not work. 

Taking this argument to the extreme: Small timing differences between
individual batches (or even components) of the same make/model exist, so
just because one chip works, the next may not work. So why spending time
and nerves on designing anything at all? :)

> So why spending time and nerves on simulation?

Because many of the problems that appear in designing a product are in the
range that can be found with a simulator, possibly more conveniently than
using the "real connection". 

Just because simulation doesn't address /all/ problems, it doesn't mean
that it's not a good tool. You read data sheets, don't you? A data sheet is
not really any different than a simulation of a device. A simulation is the
data sheet in a computer-readable form.

Gerhard

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