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IBIS FUTURES/COOKBOOK SUBCOMMITTEE MEETING MINUTES
Date: April 8, 2004

Attendees:
Cadence Design Systems - Lance Wang
Intel Corp.            - Michael Mirmak, Arpad Muranyi
Mentor Graphics        - Ian Dodd
Teraspeed Consulting   - Bob Ross

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Next Meeting:
Thursday, April 22
1 PM - 3 PM US Pacific Time

               Telephone     Bridge   Passcode
              916-356-4261     4      282-0276

Agenda:
Cookbook Discussion
- Proper methods of data                      Arpad Muranyi/Lance Wang
  extraction 

Futures Discussion
- IIRD1                                       Michael Mirmak

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COOKBOOK MINUTES

Arpad Muranyi reported that not much progress has been made on 
defining proper data extraction methods for the new cookbook.  Lance
Wang suggested that, at a minimum, c_comp's description should be 
improved to be more buffer-oriented and less package-oriented.

Arpad asked whether EBD, IBIS and ICM should be treated together in
the same document.  The group in general opposed this idea.  

Bob Ross reviewed the current cookbook and presented a proposal
for the design of a new cookbook.  The current sections on validation,
correlation and listing IBIS resources require an update in
any revision, with the correlation section requiring only a brief
reference to the Accuracy and Quality documents.  Bob indicated
that a complete re-write, rather than selected editing, of the
document is required.  Minimal keyword documentation would be
included, organized by topic.  Roy Leventhal may be a potential
author for the new document, as would Michael Mirmak.

Minimally, the cookbook should cover the following:

- CMOS totem-pole designs (input, output, I/O, tristate,
                           open-drain, open-source)
- terminations in CMOS buffers
- PECL and ECL
- multi-stage and [Driver Schedule] buffers
- [Model Spec]
- [Bus Hold]

ARs:
John Angulo - provide overview of differential model extraction 
              details
Michael Mirmak - create outline using current examples of above
              model types

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FUTURES MINUTES

Ian Dodd presented John Angulo's proposal for [External Circuit] and
[Circuit Call] expansions.  In brief, [Circuit Call] is modified
to allow inclusion of [Model].  This ensures that measurement criteria
plus native or "old" IBIS descriptions can be combined with new
power delivery 

No objections were raised, but several tricky issues were mentioned:
- supporting "old" IBIS means maintaining the implicit pad connections
  under the [Pin] keyword; how can this be addressed with 4.1?
- situations like [Ramp] must be avoided; how can we exclude 
  "old baggage" from previous revisions in future updates?

Michael Mirmak noted that, at minimum, statements excluding 
[Model] would have to be edited out of [External Circuit] and
[External Model] specification text at pages 84 and 101.

Bob suggested that a "design kit" approach be used for providing
examples in the specification and to customers.

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For reference, the seven original BIRD proposals are listed below:

1) Define accepted digital states for input and output
   ports on IBIS 4.1 AMS models

2) Provide explicit links between ICM and IBIS

3) Expand [Circuit Call] to accept native IBIS [Model]
   and [External Model] references

4) Define series links between pins, pads and/or nodes
   under the multi-lingual extensions

5) Create user-definable buffer delay and input threshold
   measurements

6) Permit re-use of port names under [External Model]
 
7) Permit native IBIS data to be linked through external
   file names, similar to the multi-lingual extensions

Attendees were assigned to complete formal proposals or
definitions for the above, as follows:

1) Ian Dodd
2) Michael Mirmak
3) John Angulo
4) Ian Dodd & Bob Ross
5) Lance Wang, Ian Dodd and Arpad Muranyi
6) Arpad Muranyi
7) Lynne Green

The formal statements should include a problem statement and
a general outline of the solution.  

I-t and core currents will be discussed by Syed at a 
future meeting.