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] On Behalf
Of Mirmak, Michael
Sent: Friday, June 05, 2015 11:34 AM
To: 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/
