IBIS Macromodel Task Group

Meeting date: 29 Jan 2008

Members (asterisk for those attending):
  Ambrish Varma, Cadence Design Systems
* Arpad Muranyi, Mentor Graphics Corp.
  Barry Katz, SiSoft
* Bob Ross, Teraspeed Consulting Group
* David Banas, Xilinx
  Donald Telian, consultant
  Doug White, Cisco Systems
  Essaid Bensoudane, ST Microelectronics
  Ganesh Narayanaswamy, ST Micro
* Hemant Shah, Cadence Design Systems
* Ian Dodd
  Joe Abler, IBM
  John Angulo, Mentor Graphics
  John Shields, Mentor Graphics
  Ken Willis, Cadence Design Systems
  Kumar, Cadence Design Systems
* Lance Wang, Cadence Design Systems
  Luis Boluna, Cisco
* Michael Mirmak, Intel Corp.
* Mike LaBonte, Cisco Systems
  Mike Steinberger, SiSoft
  Mustansir Fanaswalla, Xilinx
  Patrick O'Halloran, Tiburon Design Automation
  Paul Fernando, NCSU
* Radek Biernacki, Agilent (EESof)
* Randy Wolff, Micron Technology
  Ray Comeau, Cadence Design Systems
  Richard Mellitz, Intel
  Richard Ward, Texas Instruments
  Sanjeev Gupta, Agilent
  Shangli Wu, Cadence
  Stephen Scearce, Cisco Systems
  Steve Pytel, Ansoft
  Syed Huq, Cisco Systems
  Syed Sadeghi, ST Micro
* Terry Jernberg, Cadence Design Systems
* Todd Westerhoff, SiSoft
  Vikas Gupta, Xilinx
  Vuk Borich, Agilent
* Walter Katz, SiSoft

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Call for patent disclosure:

- No one declared a patent.

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Opens:

- No meeting next week due to DesignCON

- Some discussion about phone and web sharing integration.

- Some discussion on DesignCON papers.

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Review of ARs:

- Randy will investigate the JESD79-3a Tvac 57/75 "typo"
  - Done, but email not sent
  - Was "done by committee".
  - Members do not recall why it was done that way.

- AMI BIRD authors meet to prove AMI BIRD can handle Mellitz cases
  - Mike S. had responded and said it works.
  - SiSoft stopped short of publishing details.
  - Richard Mellitz has not provided details about non-linear cases.
  - Could be discussed at the summit, if Rich can attend.
  - We need vendor opinions on the LTI assumption.

AR: David Banas report Xilinx position on LTI assumption for SerDes

- Michael M. sketch new IBIS interconnect plan
  - In progress
  - Will drop this

- Walter coordinate completion of true diff BIRD draft
  - In progress

- Michael M. draft Eye keywords for true diff BIRD
  - In progress

- Randy draft derating keywords for true diff BIRD
  - In progress

- Arpad:  Write parameter passing syntax proposal (BIRD draft)
  for *-AMS models in IBIS that is consistent with the
  parameter passing syntax of the AMI models
  - TBD

- TBD:    Propose a parameter passing syntax for the SPICE
  - [External ...] also?
  - TBD

- Arpad:  Review the documentation (annotation) in the macro libraries.
  - Deferred until a demand arises or we have nothing else to do

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New Discussion:

We looked at the JESD79-3a spec with the discontinuity
(after an interminable period of experimenting with LiveMeeting to figure
 out how to share it)
- Table jumps from 57 @ 2.0 V/ns to 75 @ >2.0V/ns.
- Walter: this rule is strange, but can be implemented.

Michael Mirmak showed the ICM interfacing BIRD:
- The perception is that IBIS package models are "lame".
- Difficult to use because there are no die pad names.
- BIRD preserves assumption of 1-to-1 relation of pads to pins.
- Can use ICM to connect to rails without [Pin Mapping].
- Change to existing [Package Model] keyword: accept .icm file extensions.
- No cross-checking between IBIS and ICM models.
- [External Package] will not be used.
- Positive comments at ICM review meeting last week.
  - There has not been much other discussion about this BIRD.
- Arpad: Will this cause problems for Sigrity single ground reference approach?
  - Michael M.: no feedback yet.
- Arpad: reference nodes?
  - Michael M.: IBIS seems to assume node 0 for ground.
  - Assumptions remain true when ICM is used.
- Bob: no tree style example here.
  - Michael M.: IBIS seems to assume node 0 for ground.
- Bob: can it be used with nodal style?
  - Haven't resolved IIRD 9 yet (S-param reference).
  - Can't use s-param with nodal style.
- Bob: This will be diffcult to check:
  - Michael M.: Hoping to get this approved quickly.
  - Bob: speed may not be a benefit if it is difficult to use.
  - Arpad: This is actually a simpler proposal.

AR: Mike L. link to ICM BIRD on ATM web page

Agenda for next meeting is not certain

Next meeting: 12 Feb 2007 12:00pm PT

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