Minutes, IBIS Quality Committee

24 Jun 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:

- Anders create example IBIS file with golden waveforms
  - TBD, long term

- Mike add explanation of OPTIONAL and make 5.2.9 OPTIONAL
  - Done, discussed today

New items:

Continued review of the IBIS Quality Specification:

Discussion of "OPTIONAL":
- David sent an email proposing that OPTIONAL checks are for IBIS data items
  that relax constraints on other IBIS data
- Mike added a definition of OPTIONAL as 1.3
- Currently the only remaining OPTIONAL check is 5.2.9
- Mike: 5.2.9 is optional in the same way that [Diff Pin] is:
  - The data is not required
  - The check is required only if the data is present.
- We added a sentence to 1.3 to explain the conditions under which a
  check might be OPTIONAL
  - There may be a mismatch between IBIS format and available data.
  - Moshiul: For example, some [Model Spec] data is hard to obtain.

5.2.15.	{LEVEL 2} [Model Spec] S_Overshoot subparameters track typ/min/max
- Bob: Does this mean typ/min/max voltage?
- BIRD 109.1 was passed recently, clarifying these terms.
- Moshiul: What if there is one number for max voltage, no typ?
  - Bob: typ is always required
  - Would put same number three times
  - Mike: Doesn't this track forward bias of power clamp?
- Mike: The title does not say typ/min/max "what"
- Mike: Do some devices clamp to ground?
  - Some power supplies are unable to sink current to reduce voltage.
  - Bob: Yes, ECL for example.
- Bob: IBIS is not for checking simple problems like excessive power supply
- This implies that min and max can not be NA
  - Bob: NA usually means "use typical"
- Bob: This originated with Quad
- What does ibischk do?

AR: Mike determine IBISCHK4 checks for [Model Spec] S_overshoot parameters

Mike will be unavailable for a 1 Jun 2008 meeting
- We decided not to meet that day

Next meeting:

08 Jul 2008 11-12 AM EST (8-9 AM PST)

Meeting ended at 12:06 PM Eastern Time.