From: ibis-interconn-bounce@freelists.org on behalf of Mirmak, Michael
[michael.mirmak@intel.com]
Sent: Wednesday, July 30, 2008 12:56 AM
To: ibis-interconn@freelists.org
Subject: [ibis-interconn] IBIS Ad Hoc Interconnect Task Group July 23,
2008 Minutes and July 30 Reminder


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IBIS INTERCONNECT MODELING AD HOC TASK GROUP MEETING MINUTES AND AGENDA

http://www.eda.org/ibis/adhoc/interconnect/

Mailing list: ibis-interconn@freelists.org

======================================================================
Next Meeting
Wednesday, July 30, 2008
9 AM US Pacific Time

               Telephone     Bridge   Passcode
              916-356-2663     3      622-9036

Use the LiveMeeting Links in Outlook or the information below:
        Meeting ID:     1dcee49ec86e466ba39f5529d2d848f5
        Entry Code:     MdI0H8C1PR
        Location:       meet:sip:michael.mirmak@intel.com;gruu;opaque=app:conf:focus:id:1dcee49ec86e466ba39f5529d2d848f5%3Fconf-key=MdI0H8C1PR

      http://tinyurl.com/6apvzw

Agenda:
- Call for patents
- Opens
- Touchstone 2.0 Formal Text Review

======================================================================

Minutes from July 23:

Attendees:
----------
(* denotes present)
Agilent                    - Radek Biernacki*, John Moore, Ken Wong*
Ansoft                     - Denis Soldo*
Cadence Design Systems     - Terry Jernberg*, Brad Griffin
Green Streak Programs      - Lynne Green
Hewlett-Packard            - Rob Elliott
Intel                      - Michael Mirmak*
Mentor Graphics Corp.      - John Angulo*, Vladimir Dmitriev-Zdorov*
Micron Technology          - Randy Wolff
Sigrity                    - Sam Chitwood, Raymond Y. Chen, Tao Su, Brad Brim*
SiSoft                     - Walter Katz*
Teraspeed Consulting Group - Bob Ross*

========================================================================
No patents were announced.

The team reviewed the draft text of the full Touchstone 2.0 specification.

Radek suggested that the new text on page 4 could be prelaced with a better
discussion of conventional vs. mixed-mode representations.  He will provide
this text.  Radek also suggested that the characters "MMS" could be used on
the option line to signify mixed-mode data and, in combination with [Mixed-mode Order],
no specific [Mixed-mode Data] keyword would be required.  Bob later suggested that
even MMS could be removed in favor of simply using "S" with [Mixed-mode Order].

Vladimir noted that the [Matrix Format] keyword and conventions can apply to
mixed-mode data.  This restriction should be removed.  In addition, Radek
observed that the presence of SD1,5 should prevent use of SD5,1 data.  Vladimir
also noted that the term "relationship" is better changed to "variable" or "mapping."

Additionally, a rule should be added to note that the number of ports is related
to the number of elements in [Mixed-mode Order].

On [Mixed-mode Order], Bob suggested that whitepace be used as a delimiter, without
semi-colons but perhaps with parentheses.  Brad disagreed, suggesting that parentheses
complicate parsing.  The team will review this in a future meeting.

Vladimir noted that the single-ended impedances in the [Reference] keyword should follow
the port numbering order.  Further, the text on referece impedance should note that the
common-mode impedance is actually one-half of the single-ended impedance given.  The
example given is missing at least one data column and should have an additional reference
impedance.

Mixed-mode S-parameter transformations may have to be explained in an appendix.  Y, Z
Transformations are much more difficult and may also require explanation, if supported.

Reviews will continue on the updated text in the next meeting.
========================================================================

Team Objectives:
1) complete ICM-IBIS linking BIRD and any associated changes to the
   ICM specification
2) update the ICM specification, if needed, to clarify the mapping of
   ICM nodes to S-parameter ports
3) complete a specification for "Touchstone Plus" or similar
   industry-standard definition for Touchstone-like files, to include
   complex impedance references, removal of limits on the maximum number
   of ports and per-port impedance references
'
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