IBIS Macromodel Task Group

Meeting date: 18 Sept 2007

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
  Patrick O'Halloran, Tiburon Design Automation
  Paul Fernando, NCSU
* Radek Biernacki, Agilent (EESof)
* Randy Wolff, Micron Technology
  Ray Comeau, Cadence Design Systems
  Richard Ward, Texas Instruments
  Sanjeev Gupta, Agilent
  Shangli Wu, Cadence
  Stephen Scearce, Cisco Systems
  Syed Huq, Cisco Systems
  Syed Sadeghi, ST Micro
* 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:

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Review of ARs:

- SiSoft will propose a new reserved_parameter keyword table
  - TBD

- Write parameter passing syntax proposal for a possible BIRD
  a) Propose a parameter passing syntax for AMI models
  b) IBIS spec should allow parameter value assignment for
     *-AMS using a syntax that is consistent with the
     parameter passing syntax of the AMI models
  c) Allow parameter passing for SPICE [External ...] also?
     - Berkeley SPICE does not handle paraeters at all.
     - Walter proposed handling this with a preprocessor

- Ian: send relevant papers on related IEEE work
  - TBD
  - Doug will attempt to get Steve Pytel (Ansoft) and/or 
    Rich Mellitz to discuss upcoming paper regarding LTI
    assumptions wrt Serdes

- Arpad: Review the new macro library files.
  - TBD

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New Discussion:

- Cadence AMI toolkit status:
  - Cadence should release this by THIS Friday, 9/21
- Discussion of BIRD proposal:
  - No updated BIRD yet; need to digest Michael's comments and incorporate
  - Differential measurements and/or eye diagram parameters are not
    currently available in IBIS
  - Currently Algorithmic Models are tracked under the [Model] keyword
  - Suggestion to link Algorithmic models to IBIS at the [Pin] keyword level
  - Allows presentation of eye templates in IBIS, diff-loading parameters,
    etc.
  - Should we allow multiple diff-pin definitions?
	- A way to implement a model selector
	- Would allow multiple models to be available to a specific pin-pair,
	  eye templates, etc.
  - Walter:  Do we want to allow a differential model?
	- Could have eye templates
	- Could have BER probe point information, etc.
  - Arpad:  Then do we need a [Diff Model] keyword?
  - Walter:  Like this idea, could also have extensible parameters in 
 	this section
  - Lots of discussion about the "shoe horning" problem of fitting diff-models
	into single-ended IBIS architecture
  - Michael:  Do we need to start IBIS afresh...or do we need an IBIS branch,
	not necessarily maintaining backward compatibility?
  - Arpad:  AMI BIRD proposal will maintain the shoehorning approach; perhaps
	we follow this committee's work with another for a Differential Model
	spec
  - Walter: So Active high and Active low pins both point to same model (same as
	the rule for AMS?)
  - Walter: On the subject of crosstalk, the Algorithmic model will expose the 
	EDA tool to the number of aggressors it can handle
  - Need to add some verbage to the BIRD saying that the non-AMI portions of the
	models need enough information so the EDA tool can know how to characterize
	the analog portion of the channel...should probably be added to the section
	which discusses the electrical isolation between the digital and analog portions
	of the models/channel
  - Walter went over his comments quickly, including discussion of double-quote 
	escape characters, etc.

AR:  Ambrish will update the BIRD, resend by Friday, everyone should review,
	and we'll go over this next meeting

Next meeting: 25 Sep 2007 12:00pm PT