IBIS - EIA IBIS Open Forum Activity: RE: [IBIS] problem with the

From: Tom Dagostino <tom@teraspeed.com>
Date: Tue Dec 21 2004 - 21:45:01 PST

If you list a pin in a pin list it needs to have a model assigned to it. If
you do not want to generate the model then use model type NC. Commenting
out those pins that you do not want to list models for also works but...

Tom Dagostino
Teraspeed Consulting Group LLC
503-430-1065
tom@teraspeed.com
www.teraspeed.com

-----Original Message-----
From: Vivek Kumar Sundriyal [mailto:Vivek.Kumar.Sundriyal@nsc.com]
Sent: Tuesday, December 21, 2004 9:41 PM
To: tom@teraspeed.com
Cc: ibis@eda.org; lgreen; owner-ibis@eda.org
Subject: RE: [IBIS] problem with the pin mapping

Hi,

Thx to all the replies.

Tom,
Is it right to create a model for a pin for which i do not want the
IBIS
model ?

As of now i have commented out those pins in the [Pin mapping] section
from the .ibs file. Hope this will not creat any problems further.

any comments ?

-- Vivek

                      "Tom Dagostino"
                      <tom@teraspeed.co To: lgreen
<lgreen22@mindspring.com>, "'Vivek Kumar
                      m> Sundriyal'"
<Vivek.Kumar.Sundriyal@nsc.com>, ibis@eda.org,
                                                owner-ibis@eda.org
                      12/21/04 10:42 PM cc:
                      Please respond to Subject: RE: [IBIS] problem
with the pin mapping
                      tom

Make a model for dummy

Tom Dagostino
Teraspeed Consulting Group LLC
503-430-1065
tom@teraspeed.com
www.teraspeed.com

-----Original Message-----
From: owner-ibis@eda.org [mailto:owner-ibis@eda.org]On Behalf Of lgreen
Sent: Tuesday, December 21, 2004 8:12 AM
To: 'Vivek Kumar Sundriyal'; ibis@eda.org; owner-ibis@eda.org
Subject: RE: [IBIS] problem with the pin mapping

Hello, Vivek,

1) Pins 2 and 3 are commented out under the [Pin] keyword.
2) Since the pins are not defined under [Pin], they cannot be used with
later keywords, such as [Pin Mapping].

Besr regards,
Lynne

-----Original Message-----
From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Vivek
Kumar Sundriyal
Sent: Tuesday, December 21, 2004 3:00 AM
To: ibis@eda.org; owner-ibis@eda.org
Subject: Re: [IBIS] problem with the pin mapping

Hi ,

I have generated the IBIS model for an I/O buffer.. I get the correct
waveforms.
However if i run IBISCHK4 on the IBIS Model, i get the following error.

ERROR - Component '32G0402': Pin Mapping Pin '2' not previously declared in
Pin
section.
ERROR - Component '32G0402': Pin Mapping Pin '3' not previously declared in
Pin
section.

[Pin] signal_name model_name R_pin L_pin C_pin
1 vss GND
| 2 DA dummy
| 3 EN dummy
6 vssio GND
7 vddio POWER
9 PAD iobuffer
12 vdd POWER
|
[Pin Mapping] pulldown_ref pullup_ref gnd_clamp_ref
power_clamp_ref
|
1 DRV_GND NC
2 NC NC
3 NC NC
6 CLMP_GND NC
7 NC CLMP_VDD
9 DRV_GND DRV_VDD CLMP_GND CLMP_VDD
12 NC DRV_VDD

Now if i remove the comments from Pin name 2 and 3 from the pin section,
than i
get the following error :-
ERROR - Component '32G0402': Model 'dummy' for Pin '2' not defined.
ERROR - Component '32G0402': Model 'dummy' for Pin '3' not defined.

How do i get over this error ?

Thx,
Vivek

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