Minutes, IBIS Quality Committee

15 Apr 2008

11-12 AM EST (8-9 AM PST)

ROLL CALL
  Adam Tambone
* Anders Ekholm, Ericsson
  Barry Katz, SiSoft
  Benny Lazer
  Benjamin P Silva
  Bob Cox, Micron
* Bob Ross, Teraspeed Consulting Group
  Brian Arsenault
* David Banas, Xilinx
* Eckhard Lenski, Nokia Siemens Networks
  Eric Brock
* Guan Tao, Huawei Technologies
  Gregory R Edlund
  Hazem Hegazy
  Huang Chunxing, Huawei Technologies
  John Figueroa
  John Angulo, Mentor Graphics
  Katja Koller, Nokia Siemens Networks
  Kevin Fisher
  Kim Helliwell, LSI Logic
  Lance Wang, IOMethodology
  Lynne Green
* Mike LaBonte, Cisco Systems
  Mike Mayer, SiSoft
* Moshiul Haque, Micron Technology
  Peter LaFlamme
  Randy Wolff, Micron Technology
  Radovan Vuletic, Qimonda
  Robert Haller, Enterasys
  Roy Leventhal, Leventhal Design & Communications
  Sherif Hammad, Mentor Graphics
  Todd Westerhoff, SiSoft
  Tom Dagostino, Teraspeed Consulting Group
  Kazuyoshi Shoji, Hitachi
  Sadahiro Nonoyama

Everyone in attendance marked by *

NOTE: "AR" = Action Required.

-----------------------MINUTES ---------------------------
Mike LaBonte conducted the meeting.

Call for patent disclosure:

- No one declared a patent.

AR Review:

AR: Mike add Anders Ekholm to ibis-quality email list
- Done

AR: David send David & Roy correlation presentation to Guan
- Done

New items:

- Mike: we previously wanted to discuss:
  - BIRD 105 Mandatory Golden Waveform Data
  - Thresholds for overshoot/undershoot
  - David had suggested discussing and comparing in this meeting:
    - Presentations from Guan
    - Presentation from David & Roy
    - IQ specification section 7 text

Discussion of BIRD 105 Mandatory Golden Waveform Data:
- Anders: David talked about correlating with well defined fixtures
  - Lab measurements on real boards are much harder to correlate.
- Bob: This tests both the model and the EDA tool.
- Anders: Golden waveforms do not indicate how data was produced (sim v meas).
- Bob: Simumlation vs measurement remains a controversy.

- Mike: The IBIS Quality specification could have a G designation
  - This would indicate that the file contains golden waveforms.
  - Bob: If it was also correlated the designation could be SG or MG.
- David: But the M & S correlation might not be based on the golden waveforms.

- Mike: We need standards for golden waveform fixtures.
- Bob: This gets complicated:
  - Customers will not shut down a project based on a technicality like lack
    of golden waveforms.
  - Mandatory requiremnts create a force to "drive around" them.
- Mike: Example of a fixture that doesn't help:
  - Same fixture as [Rising waveform] & [Falling waveform].
- Moshiul: When a driver has a number of speed grades or other options,
  many golden waveforms be called for.
  - How do we define a minimum set that is reasonable?
  - Bob: If there are two similar buffers in a file we might not need golden
    waveforms for both.
- Anders: How do we encourage the production of golden waveforms?
  - Mike: We need a tool to produce them.
  - Bob: The IOMeth web site might mention something about this.
- Bob: No EDA tool processes golden waveforms automatically:
  - Anders: Ericsson is developing a validation tool
    - This is planned for internal use.

AR: Mike contact Lance about golden waveform generation

Anders: We need to consdider the types of test fixtures that might be used.

Next meeting:

22 Apr 2008 11-12 AM EST (8-9 AM PST)

Meeting ended at 12:51 PM Eastern Time.