Subject: Input model with Pullup-/Pulldown-Reference

From: Alexander Loehr <[email-masked]>
Date: Thu, 08 Nov 2001 10:50:32 +0100

Hi!

I've got an IBIS input model without a [Voltage Range]. Take a look at the IBIS Specification 3.2:

[Voltage Range] -> Other Notes:
If the [Voltage Range] keyword is not present, then all four of the keywords described below must be present: [Pullup Reference], [Pulldown Reference], [POWER Clamp Reference], and [GND Clamp Reference]. If the [Voltage Range] is present, the other keywords are optional and may or may not be used as required. It is legal (although redundant) for an optional keyword to specify the same voltage as specified by the [Voltage Range] keyword.

But it is not possible that an "input" model has [Pullup Reference] and [Pulldown Reference]. 

Is the IBIS specification correct?

Thanks,
Alex.
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 Alexander Loehr   ZUKEN GmbH           Phone: +49-(0)5251-150622
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