IBIS Quality Teleconference
July 16, 11 AM EST (8 AM PST)

MINUTES

- Roll call
Adam Tambone Adam.Tambone@fairchildsemi.com
*Barry Katz bkatz@sisoft.com
Benjamin P Silva benjamin.p.silva@intel.com
*Bob Ross bob_ross@mentor.org
*Eckhard Lenski Eckhard.Lenski@icn.siemens.de
Eric Brock ebrock@sisoft.com
*Gregory R Edlund gedlund@us.ibm.com
Hazem Hegazy hazem_hegazy@mentorg.com
John Figueroa jfigueroa@apple.com
Kevin Fisher kfisher@sisoft.com
*Kim Helliwell kimgh@apple.com
*Lynne Green lgreen@cadence.com
Mike Labonte mlabonte@hhnetwrk.com
Peter LaFlamme plaflamm@amcc.com
Robert Haller rhaller@sisoft.com
Roy Leventhal Roy_Leventhal@3com.com
Sherif Hammad sherif_hammad@mentorg.com
*Todd Westerhoff twesterh@cisco.com
Tom Dagostino tom_dagostino@mentorg.com

Everyone in attendance marked by  *

- Review of minutes for July 2
*The three people mentioned last week, interested in joining Quality
committee:
   Ralf Bruening Zuken ralf.bruening@zuken.de
   Yabu Akira Elpida yabu-akira@elpida.com
   Jun Kitano Elpida jun.kitano@us.elpida.com
*Discussion:
BIRD 70.5, "not in first draft" means not for the draft to be presented =
at
PCB East, mainly to limit the scope of draft so can get it out.  Greg
noted that this was in the original Quality/Accuracy work.  A "Figure of
Merit" attaches to each golden waveform, describing fit to simulator
output.  Documentation should include the name of the simulator.
Consensus to add back in to the first draft.

- AR review (none open)
None.

- Opens for new items
*Bob Ross - Linux executable uploaded.
AR: Barry to send test case for ibischk3.2.8 "warnings" to Bob.
*Latest minutes have been uploaded.
*Barry has the IBIS parser regression test case file available as a =
zip/tar
file.

- Discuss adding Summary section at top of IBIS file (tabled from
previous meeting).
*Per older minutes, quality "header" in IBIS file.  Thoughts were to =
collect
summary of models (and other objects) quality ratings at the top.  Could
be done using a script.  EDA tool support for this is needed if we =
decide
to do this?  No, but helpful - just don't want to wait for them.  Script
could be "freeware" uploaded to IBIS/Quality web site.  Format as a
comment, possibly a "controlled" comment (such as |IQ), to not require
a BIRD. Or could go under [Notes].  Some parsers skip comment
strings.
Consensus is to put summary of quality ratings at the top using "|IQ".

- Level 0 keywords and required tool support.
*Documents minimum IBIS keywords and subparameters, and how
tools use that data.  Also document how data is checked.
AR: Barry to bring checklist up to date, based on past minutes.
AR: Lynne and Barry to identify Level 0 keywords.

- Identify limitations in IBIS specification for feedback to the IBIS
committee
*IBIS has limitations in waveform processing.  Example: different
definitions of over/undershoot.  Some semiconductor vendors
specify areas, others absolute voltages.  Some of this is simply
not defined in IBIS waveform processing capabilities.  BIRD 75
allows users to add things like this directly to models, but this
will probably only be used for high-end models.
*Email from Eckhard today, things that could be added to the
checklist.  Number of logic stages between SPICE source and
buffer (he recommends at least 3, to make buffer characteristics
independent of SPICE source slew rate).  Length of lead-in time
for V-t tables (time from Time=3D0 to time V-t starts) - different EDA
tools handle this differently.  Need to separate internal delay of =
buffer
from external logic stage delay.  Must shift all V-t tables by the
same amount to keep proper accuracy of internal buffer delay.
*Summary: Some of dead lead-in time can be removed, and captured
in the timing test loads.  V-t tables must have the same lead-in time
removal for accurate simulation waveforms.  Timestep for V-t tables is
also critical.

- Schedule next meeting
July 30, 11 AM EST (8 AM PST)
Phone: 408-974-8478 or 800-249-5618
Meeting access: CONFERENCE SERVER 2, Conference ID: 4203

---------------------------------------------------------------------
IBIS Quality archives: http://www.freelists.org/archives/ibis-quality
To unsubscribe send an email:
  To: ibis-quality-request@freelists.org
  Subject: unsubscribe