                                             
IBIS Macromodel Task Group

Meeting date: 03 Jan 2012

Members (asterisk for those attending):
Agilent:                      Fangyi Rao
                              Radek Biernacki
Altera:                     * David Banas
Ansys:                        Samuel Mertens
                            * Dan Dvorscak
                            * Curtis Clark
Arrow Electronics:            Ian Dodd
Cadence Design Systems:       Terry Jernberg
                            * Ambrish Varma
			      Feras Al-Hawari
Celsionix:                    Kellee Crisafulli
Cisco Systems:                Ashwin Vasudevan
                              Syed Huq
Ericsson:                     Anders Ekholm
IBM:                          Greg Edlund
Intel:                        Michael Mirmak
LSI Logic:                    Wenyi Jin
Maxim Integrated Products:    Mahbubul Bari
Mentor Graphics:            * John Angulo
                              Zhen Mu
                            * Arpad Muranyi
                              Vladimir Dmitriev-Zdorov
Micron Technology:            Randy Wolff
NetLogic Microsystems:        Ryan Couts
Nokia-Siemens Networks:     * Eckhard Lenski
QLogic Corp.                  James Zhou
Sigrity:                      Brad Brim
                              Kumar Keshavan
                            * Ken Willis
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

The meeting was lead by Arpad Muranyi

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Opens:

- Arpad: We could cancel the 31 Jan meeting, near the DesignCON summit

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Call for patent disclosure:

- None

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Review of ARs:

- Arpad send BIRD 123 changes from today to Walter
  - Done

- Walter update BIRD 123 draft
  - Done

- Arpad update Usage
  - Sent to email list, will be posted

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New Discussion:

Walter showed the Jitter BIRD:
- Ken: I had asked for additional verbage to be added but do not see it
- Walter: I have added it into the BIRD introduction, but not to the IBIS spec changes
- Ken: It should go in the spec to guide model developers
- Walter moved the paragraphs into the spec change portion
  - The editorial group can decide if/where to move those paragraphs
- Arpad and Bob agreed with this change
- Bob: List, Increment and Step types have been added
  - Are these types needed for jitter parameters?
- Arpad: It would be useful to use this table for all Reserved parameters
- Bob: We already have 4 tables
  - They could be merged but grouped
- Bob: There was a Tx_Sj_Frequency issue, can't find it now
  - It was a 5.1 issue
- Walter: Discussions of the changes from old versions to new should be separate
  - We repeatedly spend time on this issue
- Bob: Once we have 5.1/5.2 we have no basis for writing a parser
- Arpad: This is a big issue, should be discussed in Open Forum
  - What is the problem with writing a parser?
- Bob: The parser has to parse old versions that the new spec will not describe

- Bob motioned to vote to submit BIRD 123 with changes
- Ken seconded
- No objections, the motion passed

AR: Walter submit updated BIRD 123 to Open Forum

Arpad showed the new Usage Out Fix BIRD draft:
- Arpad: I added two small sections
  - Page 140:
    - The descriptions were misleading
      - It now has "to the AMI model"
    - Corner type for Usage Out is disallowed
      - The model is not the authority to know the selected corner
  - In BIRD 127.4
    - Default and Value are mutually exclusive, must not be used together
      - They are synonyms in this case
    - Default is not allowed for Usage Out
    - Default is optional for Range, List, Corner, Increment, Steps
    - Note 10 is moved to above the list of Notes
      - This is an actual rule, not just a note
- Ambrish: We could have an example to show what the EDA tool should do
  - Currently it only says what can be ignored
- Arpad added a phrase
- Ambrish: An example would be better
- Bob: The removed note should still be in the notes
- Arpad re-inserted a note #8
- Bob: We do not require Default and Value to be exclusive?
- Walter: There is an implied default for all types but List
  - We should recommend using Default only for List
- Arpad: We could eliminate Default by using the first List item as the default
- Mike: Do we specify preference order between Default and implied defaults?
- Arpad: Yes, Default must be used if present
- Bob: There is a question on how Default interacts with Increment
- Walter: This BIRD clarifies all of the ambiguities
- Arpad: We can review one more time before submitting

AR: Arpad send updated Usage Out Fix BIRD to Mike for posting

Arpad showed a slide showing package BIRDs by sponsor:
- Arpad: We should weed out some BIRDs
- Walter: BIRDs 116-118 are a valid way to do it
  - BIRD 116 needs a reference to IBIS-BSS to handle non-AMI buffer models
- Arpad: This will be a major topic of discussion in our next meetings

Meeting ended.

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Next meeting: 10 Jan 2011 12:00pm PT

Next agenda:
1) Task list item discussions

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IBIS Interconnect SPICE Wish List:

1) Simulator directives
