Minutes, IBIS Quality Task Group

01 October 2019

11:00-12:00 EST (08:00-09:00 PST)

ROLL CALL

Intel Corp.                         Michael Mirmak
Mentor, a Siemens Business          Arpad Muranyi
Signal Integrity Software:        * Mike LaBonte
SPISim                              Wei-hsing Huang
Teraspeed Labs:                   * Bob Ross
Zuken USA:                          Lance Wang

Everyone in attendance marked by *

NOTE: "AR" = Action Required.

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

Call for IBIS related patent disclosures:

- None

Call for opens:

- None

Review of previous meeting minutes:
Minutes from the September 24 meeting were reviewed.  Bob Ross moved to approve the minutes.
Mike LaBonte seconded.  Without objection the minutes were approved.


ARs:
- None


IBISCHK700 parser development:
Bob Ross said the developer was implementing changes based on our feedback, especially
related to not allowing backslashes in file names.  The primary problem was a file
reference to a subdirectory using a forward slash in the [File Name] keyword, found
in a regression testcase.  Mike LaBonte said whatever directory the .ibs file was in
was the root directory, so there should be no directory elements there.  Bob agreed,
saying it was an error if [File Name] had a directory path.  He was not sure when new
code would be ready, but he expected it would be a small fix.


IBISCHK7 source code license:
Bob Ross said we had 6 agreements signed, 3 had paid.  Bob said there was a question
from Intel about the license for our freely available executables.  Mike LaBonte
noted that we do not have it in writing that they are freely available. He suggested
a note on the IBISCHK web page might suffice.  Bob said source code licensees can
compile their own executables, and the agreement permits them to distribute those,
even with modifications.  He noted that license payments received so far were enough
to cover the initial development payment.


New IBISCHK bugs:
Bob Ross noted that BUG207 had not yet been classified.  Mike LaBonte said he
preferred to make mismatches between I-V and V-T tables a warning, not an error,
when [Add Submodel] and/or [Driver Schedule] were present.  Bob said the waveforms
of the top model were not to include those I-V tables.  Mike asked, if the top-level
waveforms did not apply to the overall combined buffer behavior, where would the
information to give the turn-on time characteristic for the Submodels come from?
Bob said Submodel was a block to be added to the main model. For example for a delayed
clamp, and it could have its own waveforms.  He described the differences between
[Submodel] and [Driver Schedule].  Mike said that if the top model waveform must not
include Submodel, hardware measurement could not be performed.  Bob said it could be
performed if the buffer had controls to disable the extra driver(s).  He said any code
changes for BUG207 would break existing models.  Mike felt that relaxing a rule could
not make existing models begin to fail.  But he agreed that no change seemed necessary,
as long as the top-level I-V and V-T needed to be matched.


IBIS-ISS parser:
- Tabled.


Mike LaBonte moved to adjourn. Bob Ross seconded. Without objection the meeting ended.

Meeting ended: 12:05 ET

Next meeting October 8, 2019