IBIS Macromodel Task Group

Meeting date: 29 July 2008

Members (asterisk for those attending):
  Ambrish Varma, Cadence Design Systems
  Anders Ekholm, Ericsson
* Arpad Muranyi, Mentor Graphics Corp.
  Barry Katz, SiSoft
* Bob Ross, Teraspeed Consulting Group
  Brad Brim, Sigrity
  Brad Griffin, Cadence Design Systems
  David Banas, Xilinx
  Donald Telian, consultant
  Doug White, Cisco Systems
  Essaid Bensoudane, ST Microelectronics
  Fangyi Rao, Agilent
  Ganesh Narayanaswamy, ST Micro
  Gang Kang, Sigrity
  Hemant Shah, Cadence Design Systems
  Ian Dodd, Agilent
  Joe Abler, IBM
* John Angulo, Mentor Graphics
  John Shields, Mentor Graphics
  Ken Willis, Cadence Design Systems
  Kumar
  Lance Wang, Cadence Design Systems
  Luis Boluna, Cisco Systems
* Michael Mirmak, Intel Corp.
* Mike LaBonte, Cisco Systems
  Mike Steinberger, SiSoft
  Mustansir Fanaswalla, Xilinx
  Patrick O'Halloran, Tiburon Design Automation
  Paul Fernando, NCSU
* Pavani Jella, TI
  Radek Biernacki, Agilent (EESof)
* Randy Wolff, Micron Technology
  Ray Comeau, Cadence Design Systems
  Richard Mellitz, Intel
  Richard Ward, Texas Instruments
  Sam Chitwood, Sigrity
  Sanjeev Gupta, Agilent
  Shangli Wu, Cadence Design Systems
* Sid Singh, Extreme Networks
  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
  Zhen Mu, Cadence Design Systems


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Opens:

- none

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Call for patent disclosure:

- No one declared a patent.


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Review of ARs:

- Todd and Michael M contact Synopsys about HSPICE legal issues
  - TBD

- Walter send updated IBIS-Spice document to Mike L for posting
  - Done
  - No public notice was sent out

- David Banas report Xilinx position on LTI assumption for SerDes
  - No update

- 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:

Arpad showed a document EBD_and_EMD_2008_07_29.doc:
- What if there are connections that do not reach the board edge?
  - PCB tools add a refdes for these
- Walter: In EMD a module can have multiple connectors that go off board
- EBD has no "diff pins", EMD does
- Walter, can EBD have a path connection to 2 pins?
  - Arpad: Not now
  - John: There can be multiple pins in a [Path Description]
    - Pins may not appear in 2 paths though
- Arpad: We should separate EBD from IBIS so EBD can be top level.
- [Pin List] proposals:
  - 2a: New keyword to identify outside connector
    - Example: [Interface Instance List]
    - Would be optional since EBD could have no outside connections
    - Mike L: Manual work is needed to connect when there are multiple connectors
      - Not plug an dplay like an IBIS component
    - Walter: EDA tool has to maintain the connectivity
    - Arpad: Would prefer not to burden people with identifying which connector
    - Walter: The EDA tool has to make the choice, not the EBD
  - 2b: Improved [Node Declarations]
    - All external ports in [Pin List]
    - Internal-only connections in [Node Declarations]
    - Walter: Inconsistent: External has no refdes, internal does
    - Mike L: Each module port will have to be called with a simple number
      - We don't call module ports like M1.J1.1
    - John: With a single external connector you have plug and play
      - With multiple connectors more info is needed
      - Need a "reference designator map"
      - EDA tool asks which connector you want for each connection
    - Walter: EDA tool can find the set of unique J names
    - Arpad: Then [Interface Instance List] is not needed
    - Bob: It is useful for error checking
- Bob: New keywords should be used to avoid confusion with EBD

AR: EDA vendors review IBIS-SPICE presented 22 Jul 2008
AR: Mike L send link to IBIS-APICE document

Arpad: Internal meetings are held every 2 weeks
- Mentor review will not be ready next week

Next meeting: 05 August 2008 12:00pm PT

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