Bob:
A number of folks that I communicate with have expressed great frustration with
the use of IBIS-AMI models in their simulators of choice. Are there examples
and a user guide which go beyond the specification?
ed
From: ibis-bounce@xxxxxxxxxxxxx [mailto:ibis-bounce@xxxxxxxxxxxxx] On Behalf Of
Bob Ross
Sent: Tuesday, June 09, 2015 11:39 AM
To: ibis@xxxxxxxxxxxxx
Subject: [ibis] Re: BIRD175.2: Extending IBIS-AMI for PAM4 Analysis
All,
On re-reading BIRD175.2, I have a few comments:
1. Both "PAM4_UpperThreshold" and "PAM4_Upper_Threshold" appear in BIRD175.2.
(Same for *Center_Threshold and *Lower_Threshold.)
I would prefer using the underbar "_" for these parameters and also for
the *Offset parameters.
2. For the *Threshold parameters, the rule:
* If the Reserved AMI Parameter Modulation is set to "PAM4" and these
threshold values are not declared, the model maker shall assume that the EDA
tool may choose a value for each of these three parameters.
should be changed.
All three parameters definitions should be declared if Modulation is set to
"PAM4" with Value
or in a List. Otherwise we are using "implicit" parameter definitions in
IBIS-AMI on unpredictable
results between EDA tools. However, the EDA tool can re-assign the values.
3. The defaults of 0.0 are OK for the *Offset* parameters, if they are missing.
(I will be out today, so I may not be able to respond.)
Bob
From: ibis-bounce@xxxxxxxxxxxxx<mailto:ibis-bounce@xxxxxxxxxxxxx>
[mailto:ibis-bounce@xxxxxxxxxxxxx] On Behalf Of Mirmak, Michael
Sent: Friday, June 05, 2015 11:34 AM
To: ibis@xxxxxxxxxxxxx<mailto:ibis@xxxxxxxxxxxxx>
Subject: [ibis] BIRD175.2: Extending IBIS-AMI for PAM4 Analysis
An updated BIRD175.2, Extending IBIS-AMI for PAM4 Analysis, has been submitted
on behalf of Walter Katz, Mike Steinberger, and Todd Westerhoff of SiSoft;
Fangyi Rao of Keysight Technologies; Bob Miller of Avago Technologies; and
Hongtao Zhang of Xilinx. It will be discussed at the next IBIS Open Forum
teleconference.
The text of the BIRD can be viewed at
http://www.eda.org/ibis/birds/bird175.2.docx.
Michael Mirmak
Intel Corp.
Chair, IBIS Open Forum
http://www.eda.org/ibis/
