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IBIS INTERCONNECT TASK GROUP MEETING MINUTES

http://www.eda.org/ibis/interconnect_wip/ 

Mailing list: ibis-interconnect@freelists.org 
Archives at http://www.freelists.org/archive/ibis-interconnect/ 

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Wednesday, August 28, 2013
8 AM US Pacific Time 

Agenda:
- Attendees
- Call for patents
- Agenda and Opens
- Look at Walter's email and see if BIRD 125 & 145 can/could do the features listed
- EMD vs. BIRD 125
- BIRD 145
- Next Meeting Dates/Agenda

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Attendees:
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(* denotes present)
Agilent                    - Radek Biernacki
Ansoft                     - Denis Soldo
Cadence Design Systems     - Terry Jernberg, Brad Brim, Dennis Nagle
I/O Methodology            - Lance Wang
Intel                      - Michael Mirmak
Mentor Graphics Corp.      - John Angulo, Arpad Muranyi*
Micron Technology          - Justin Butterfield*, Randy Wolff
SiSoft                     - Walter Katz*, Mike LaBonte*
Teraspeed Consulting Group - Bob Ross*

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Patents:

- No patents were declared.

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Opens:

- None

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ARs:

- Brad forward Si2 document on patents
  - Done

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Si2 patent:

Walter has looked at this patent, which is about representation of a silicon
device made of 2D objects, using X/Y coordinates and other information.
This patent deals more with internal structures than MCP. Walter felt that
as long as we do not use X/Y coordinates there will be no conflict with the
patent.


Email regarding requirements for three types of interconnect models:

Arpad showed an email from Walter.  Walter said Randy listed ways to
generate models.  BIRD 125 would handle package model types 1 and 4.
Walter said BIRD 125 would not handle the case 5 where aggressors are
unknown.  This uses an s6p to connect single ended DQ signals, but pin
numbers are not known, only "victim", "aggressor 1", "aggressor 2", etc.
Arpad agreed that BIRD 125, written in 2011, would not handle that.

Arpad showed a slide from 24 July 2012 that proposes a "sliding port_map
syntax" refinement.  This uses a syntax similar to [External Circuit]
to map pins to nodes.  Arpad said the syntax is somewhat verbose but
workable.  Walter felt the complexity made this a wrong approach, and also
that BIRD 145 was worse.  Mike asked if examples could be produced for EMD
and BIRD 125 using a case from Randy.  Walter said EMD examples exist.
Arpad believed a BIRD 125 example exists too.  Mike said examples of
the same case would be good.  Arpad said a smaller change would help
with legacy IBIS models.  Walter said that no one was using [Circuit
Call], and this would be unlikely.  Arpad said Randy might be able to
use BIRD 145 if it was available.  Walter asked Arpad to create a BIRD
125 example for case 5.  Arpad asked for a more concrete case 5 example.
Walter said he would provide this, adding a case 5 EMD package model for
an IBIS model.  Justin offered to help adapt an example for BIRD 125.
He said Randy will be back next week.


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Next Meeting:
Wednesday, September 4, 2013