Minutes, IBIS Quality Committee

09 June 2009

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
  Muniswarareddy Vorugu, ARM Ltd
* Pavani Jella, TI
  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
  Liqun, Huawei

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:

- Mike post new draft
  - 1.1ar was posted
  - The PDF file had a strange right side alignment

New items:

Anders Eckholm review of the IQ 1.1 specification:

- Mike: Anders reports several font consistency issues
  - Mike will fix these
- Also there are some dangling reference problems

AR: Mike fix font and reference issues in IQ specification identified by Anders

- From Anders' email:
    1.2.2 and 1.2.3 
    Comparing these two paragraphs to 1.2.1, the G designator can be used if
    only a subset of buffers models have golden waveforms
    in 1.2.2 and 1.2.3 no similar statements exists ? 
- We decided M + S can be used if a reasonable set of models are correlated.
- We added the 1.2.1 statement about this to 1.2.2 and 1.2.3

- From Anders' email:
    1.4 In the first bullet, question for any buffer for every buffer ? 
    Bullet number 2, How many buffers ? 
- We inserted "a reasonable set of"

- From Anders' email:
    1.4 The summary IQ score is stated to be placed either in a comment or
    in the [Notes] section, could we define which or do we want it loosely
    specified?
- Bob: Maybe the IQ score should be in the [Notes] section 
- Mike: Since this is not per [Model] it only needs to be at the top of the file
  - [Notes] can have lines with and without the | character
  - Bob: Tools that display [Notes] may not show the | lines
  - Mike: Most people probably look at the IBIS file directly
    - Tools might read both comment and non-comment lines anyways
- Bob: The IBIS Accuracy Handbook called for a trailer
- This remained undecided

- From Anders' email:
    2.1 middle of page.  The [IBIS ver] value can be set to at least.......
    Is this text necessary, it refers to tools and does not seem to be
    focused on model quality.
- Bob: This is about using newer versions of IBISCHK to check more things
- Mike: This paragraph is a commentary asking people to use higher [IBIS Ver]
  - It is a little off topic, written into a "Passes IBISCHK" IQ check
  - But it is a good recommendation
- Bob: Some tools support only up to IBIS 3.2

Bob:
- We should use uppercase IBISCHK throughout.
  - We first mention IBISCHK in 1.1.2 but do not explain what it is
- Need to use typ/min/max consistently
- We do not explain NCSU
- We have to use uppercase POWER as IBIS uses it

3.1.1 is unclear, the paragraph states "must have typ/min/max...." 
    And than shortly after states allows NA if not available" ? 
    And  than again says "must have ..." 
- It was unclear to us what this meant. 
- Mike: Min and max are the most important for timing checks
- Bob: This is just [Package Model], but for quality we are going beyond IBIS
  - Min and max have to each be numerically least and greatest
    - Even if that combination does not make sense
  - Only [Model] requires fast/slow correlation
  - Max L and min C might be worst case for impedance
- Mike: "NA if not available" refers to what the IBIS specification says
  - IQ clearly is going beyond IBIS requirements
- We changed the text

Meeting ended at 12:04 PM Eastern Time.

Next meeting: 16 Jun 2009 11-12 AM EST (8-9 AM PST)