Subject: [IBIS] IBIS Model for a Tri_State Pin
From: John Angulo (jangulo@innoveda.com)
Date: Fri May 17 2002 - 16:40:46 PDT
The following is posted on behalf of Andrew Ingraham. Send private
replies to Andrew.Ingraham@hp.com.
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I think the answer is, "it depends."
If you change Model_type from OUTPUT to I/O, you would have a
tri-stateable buffer. You would need to add Vinh and Vinl values too.
But if the model didn't have [Gnd Clamp] and [Power Clamp] sections
already, you wouldn't be able to correctly mimic the buffer in the high
impedance state.
Andy
> ----------
> The IBIS File contain only the data for the activ OUTPUT.
> Is the model for the Tri_State a subset of the activ output ?
> If yes, how can I generate it ?
>
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