Minutes, IBIS Quality Task Group

7 January 2020

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

ROLL CALL

Intel Corp.                         Michael Mirmak
Mentor, a Siemens Business          Arpad Muranyi
Micron Technology                 * Randy Wolff
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:

- Mike LaBonte said he would not be able to meet next week.

Review of previous meeting minutes:
Minutes from the December 31 meeting were reviewed.  Bob Ross moved to approve the minutes.
Mike LaBonte seconded.  Without objection the minutes were approved.


ARs:
- Mike LaBonte to publish web page for IBISCHK701
  - This was done.


IBISCHK7 parser development:
Mike LaBonte showed the page. Randy pointed out that the IBIS Parsers page was out of
date, and the webmaster would fix that. Mike noted that the IBISCHK7 page did not
link to that.  Bob said all source code licensees had the new code.

AR Mike add Mac
AR Randy Wolff to announce IBISCHK 7.0.1 by email


IBISCHK7 source code license:
Bob Ross reported that 8 of 9 expected payments had been received.
The last was received Jan 31.


New IBISCHK bugs:
Bob noted that we had BUG209 fixed before classifying it.

BUG207:
Randy Wolff showed BUG207.  He noted we had not yet decided whether this is truly a bug,
and if we should have limited checking for a well defined special case.  We did not
know if the new check would make any existing models fail.  Mike LaBonte suggested that
would be a good question to ask the wider audience at the upcoming summit.  Bob Ross
said 3-state models could complicate the check.  Randy said the special case was only
for models with either Model_type Output or I/O, with the Submodel enabled in all
driving modes.  Bob said the Submodel data for the case at hand could have been in
the main model.  Mike said the check for VT endpoints against IV prediction was only
for driving mode, the existence of non-driving modes was irrelevant.

Bob said we would be breaking a rule if the new parser could flag existing models that
previously passed.  Mike said the modified check could be applied only for IBIS 7.0
files and above, although he did not prefer to do it that way.  Bob said that would break
our architecture.  He said this would affect the Ramp check too.  Also, there would be
different messages for checking the whole model and just the main model.  Randy said
we could choose to make no change, especially since there was a workaround for
model construction.

Mike suggested documenting the limitation in the IBISCHK7 User Guide.  He also noted
that the check was documented as W1503, but IBISCHK would also print E1503 depending
on the extent of the violation.


IBIS-ISS parser:
Discussion was tabled.


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

Meeting ended: 12:02 ET

Next meeting January 21, 2020