IBIS Macromodel Task Group

Meeting date: 20 Nov 2012

Members (asterisk for those attending):
Agilent:                    * Fangyi Rao
                            * Radek Biernacki
Altera:                     * David Banas
                              Julia Liu
                              Hazlina Ramly
Andrew Joy Consulting:        Andy Joy
ANSYS:                        Samuel Mertens
                            * Dan Dvorscak
                              Curtis Clark
                              Steve Pytel
                            * Luis Armenta
Arrow Electronics:            Ian Dodd
Cadence Design Systems:       Terry Jernberg
                            * Ambrish Varma
                              Feras Al-Hawari
                              Brad Brim
                              Kumar Keshavan
                              Ken Willis
Cavium Networks:              Johann Nittmann
Celsionix:                    Kellee Crisafulli
Cisco Systems:                Ashwin Vasudevan
                              Syed Huq
Ericsson:                     Anders Ekholm
IBM:                          Greg Edlund
Intel:                        Michael Mirmak
Maxim Integrated Products:    Mahbubul Bari
                              Hassan Rafat
                              Ron Olisar
Mentor Graphics:            * John Angulo
                              Zhen Mu
                            * Arpad Muranyi
                              Vladimir Dmitriev-Zdorov
Micron Technology:            Randy Wolff
                              Justin Butterfield
NetLogic Microsystems:        Ryan Couts
Nokia-Siemens Networks:       Eckhard Lenski
QLogic Corp.                  James Zhou
SiSoft:                     * Walter Katz
                              Todd Westerhoff
                              Doug Burns
                            * Mike LaBonte
Snowbush IP:                  Marcus Van Ierssel
ST Micro:                     Syed Sadeghi
Teraspeed Consulting Group:   Scott McMorrow
                            * Bob Ross
TI:                           Casey Morrison
                              Alfred Chong
Vitesse Semiconductor:        Eric Sweetman
Xilinx:                       Mustansir Fanaswalla
                              Ray Anderson

The meeting was led by Arpad Muranyi

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Opens:

- Arpad unavailable for the 11/13 meeting.  Since that also coincides with
  the Asian Summit, the group agreed to cancel the meeting on 11/13.

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Call for patent disclosure:

- None

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Review of ARs:

- Arpad to send the new draft 11 of BIRD 121.2 to Mike L. to post to the ATM website.
  - Done

- Fangyi, Mahbubul, et. al., to discuss merging their "Redriver" proposal with BIRD 131.
  - TBD

- Fangyi, Mahbubul, et. al., contact Walter and Ambrish for further BIRD 131 discussions.
  - TBD

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New Discussion:

- Fangyi: Bit time is not a model parameter
  - This may be an IBM-specific problem
- Arpad: If we require far-fetched parameters not every simulator will support it
- Ambrish: These intrinsic parameters are only for dependency tables
- Arpad: No they can be used for other purposes
  - There could be a model-specific corner for example
- Fangyi: That might be uncorrelated to the main Corner
- Walter: Intrinsic is strictly for dependency tables
- Ambrish: A model may need corner information
- Walter: No need for a corner parameter, bit time is already passed
- Arpad: Some parameters might be expressed in terms of other parameters
- Walter: We could have that in the language, but we don't now

- Arpad showed BIRD150.1_draft4
- Arpad: We could use Format Bit_Time
- Walter: That is not a legal format
- Ambrish: Maybe these should be reserved parameters
- Walter: I call that intrinsic
- Radek: What if a bit time not in the table is given?
- Walter: If Out_Match is used that is an error
- Ambrish: It could be Out_PWL
- Walter: This allows multiple models to use the same AMI file
- Arpad: I'm confused about the sentence at the bottom
- Walter: It may be poorly worded
  - They can only be inputs to a dependency table
  - It needs to be explained better
  - Does this satisfy what David needs?
- David: Yes
- Ambrish: What kind of parameters will these be?
- David: Why would we have "Model" as an input?
  - It would be good to have a list of words that can't be Model_Specific parameters
- Bob: "bit_time" is lowercase?
- Walter: It is in the IBIS spec

AR: Walter provide better explanation for intrinsic parameters in BIRD draft

Walter: Two issues:
- How does back-channel work with a repeater?
- With redrivers we still need an impulse response for the repeater device
  - The stimulus is not digital
  - Classic IBIS will not understand it
- Fangyi: We have a description of that
  - The impulse is not limited to event triggered drivers
  - It could be an analog element
  - There is no contradiction
- Walter: It needs to be clarified
- Arpad: You have an AR to work on that
- John: Ambrish asked to be included in that effort

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Next meeting: 27 Nov 2012 12:00pm PT

Next agenda:
1) Task list item discussions

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IBIS Interconnect SPICE Wish List:

1) Simulator directives