[IBIS-Users] Series Pin Mapping

Hello

I have a differential input that has 2 different models in the model selector. In addition, this model makes use of the series pin mapping keyword. The issue I am having is that the 2 derivatives have different series models. The IBIS parser does not complain (though I'm skeptical), but is the following valid?

[Pin] signal_name model_name R_pin L_pin C_pin
1 SDI_IN SDI x x x
2 SDI_INb SDI x x x

[Diff Pin] inv_pin vdiff tdelay_typ tdelay_min tdelay_max
1 2 NA NA NA NA

[Series Pin Mapping] pin_2 model_name
1 2 sdi_input_term

[Model Selector] SDI
model1 description
model2 description

[Model Selector] sdi_input_term
model3 description
model4 description

The goal is for when the user selects SDI model1, the must also select sdi_input_term model3.

Thanks in advance,
Eric

________________________________
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Tom Dagostino
Sent: Wednesday, March 17, 2010 12:17 PM
To: 'ji xiao'; ibis-users@eda.org
Subject: RE: [IBIS-Users] question about IBIS simulation for a complete inverter

Ji

Historically IBIS Signal Integrity simulators are not designed to simulate the transfer function of the parts in the nets you are simulating, they only concern themselves with the interaction of the I/O buffers and the transmission line medium that is between them. There is no description of the logic function, delay or any of the other requirements that may be needed to generate the timing of signals from input to output in an IBIS model. There are some timing simulators that do at least some level of input to output simulation.

Tom Dagostino
Teraspeed(R) Labs
13610 SW Harness Lane
Beaverton, OR 97008
503-430-1065
503-430-1285 FAX
tom@teraspeed.com
www.teraspeed.com

Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
401-284-1827

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of ji xiao
Sent: Wednesday, March 17, 2010 8:06 AM
To: ibis-users@eda.org
Subject: [IBIS-Users] question about IBIS simulation for a complete inverter

Dear Sir/Madam,
As a beginner worked with IBIS model, I met a problem about the IBIS simulation for a complete device. Let's take an inverter as an example. If I want to model a complete inverter including the transfer function by using IBIS, do I just need to simulate the output model only(i.e. does the output model contain the transfer function) ? or cascade IBIS input model with output model?
If we need to cascade them, does that mean just to receive the output signal of the input model as the input signal of the output model?

Thanks and regards,
Ji Yuancheng

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