[IBIS-Users] a trisate I/O with unusual truth table

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Hi IBIS Experts,

If the truth table of an I/O is such as :

------------------
NEN DATA PAD

1 0 0
1 1 Z
0 1 1
0 0 0
------------------

How to decide the I/O type? If it is tristate, how to configure the
enable pin? Since it is not absolute active-low nor active-high logic...

I am not confident about the following config--

-----------------------------------
[Pin]
1 pad pad tristate_driver
-> data nenp
data data data dummy
nen nen enable dummy
9 gnd gnd GND
18 vdd vdd POWER

[Model] tristate_driver
[Model type] 3-state
[Polarity] Non-inverting
[Enable] active-low
------------------------------------

Thanks for the help!

Guoli

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Received on Fri May 21 11:50:30 2004