RE: [IBIS-Users] RE: [IBIS] input signal for model usage

 
Thank you Muniswar,
 
 could you confirm (or correct) these propositions? :
 
 - if I change only rise/fall slew at the input (A_in as you say)
   the Output response is the same. (could be only a little shift time in
the Output?)
 
 - if I change the input clock frequency (fck), the Output response is
correct
   until fck is under the frequency used in the V-T tables generation.
   (if I want to use an higher clock frequency, I have to generate a new
model
    with differents V-T tables)
 
 are that right?
 
 many thanks,
 
 Fabio
 
 

  _____  

From: owner-ibis-users@server.eda.org
[mailto:owner-ibis-users@server.eda.org] On Behalf Of Muniswara Reddy Vorugu
Sent: Tuesday, March 17, 2009 12:00 PM
To: Fabio BRINA; ibis-users@server.eda.org; ibis@server.eda.org
Subject: [IBIS-Users] RE: [IBIS] input signal for model usage



Hi,

The OUTPUT of I/O ( IBIS model)  does not depend on the Rise/Fall slew at
the input of I/O ( say A_in ).

 

If you mean. Can you have different  LOW/HIGH duration? 

You can give different clock/pulse frequency, but there is an upper limit of
the clock.

The upper limit of the clock frequency is limited by the duration of the V-T
tables/Ramp time.

 

Thanks,

Muniswar

 

From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Fabio
BRINA
Sent: Tuesday, March 17, 2009 3:55 PM
To: ibis-users@eda.org; ibis@eda.org
Subject: [IBIS] input signal for model usage

 

Hello IBIS experts, 

 

 Once an IBIS model has been created, can be used in different Input speeds?

 

 In other words: if I consider an I/O model, Can I use every input Pulse
with

 several rise/fall time Or I have to use only the same pulse used in the 

 model creations?

 

I hope is clear what I mean.

 

Thanks,

Fabio

 

 


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