Minutes from the 4 January 2017 IBIS Interconnect Task group meeting are
attached.
Regards,
Justin
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IBIS INTERCONNECT TASK GROUP
http://www.ibis.org/interconnect_wip/ ;
Mailing list: ibis-interconnect@xxxxxxxxxxxxx
Archives at //www.freelists.org/archive/ibis-interconn/ ;
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Attendees from January 4 Meeting (* means attended at least using audio)
ANSYS Curtis Clark
Cadence Design Systems Bradley Brim
Cisco David Siadat
Intel Corp. Michael Mirmak*
Keysight Technologies Radek Biernacki, Ming Yan
Mentor Graphics Arpad Muranyi*
Micron Technology Justin Butterfield*, Randy Wolff*
SAE ITC Maureen Lemankiewicz, Logen Johnson
Signal Integrity Software Walter Katz*, Mike LaBonte*
Teraspeed Labs Bob Ross*
University of Aveiro in Portugal Wael Dghais
Michael Mirmak convened the meeting. No patents were declared.
Justin Butterfield took minutes.
Review of Minutes:
- Michael called for review of the minutes from the December 14 meeting. Mike
LaBonte moved to approve the minutes. Arpad Muranyi seconded. The minutes
were approved without objection.
Review of ARs:
- Mike to fix the web link to the Table XX. Mike reported this was a typo in
the file extension and is now fixed.
- Michael to move Interconnect BIRD flow example to BIRD introduction. Michael
reported this is done.
- Michael to fix inconsistent black lines in the Interconnect BIRD figures.
Michael reported this is done.
- Michael to find a proper place and language for Interconnect Rules of
Precedence. Michael reported that he thinks this is done in the latest draft.
Opens:
- Michael noted that Randy Wolff sent out a version with a few fixes.
- Bob Ross suggested to use Randy's draft as a starting point for draft 46.
Michael agreed.
Interconnect BIRD draft 46:
Michael noted that in the Chapter 7.2 Rules of Precedence section there was a
question on supporting overlapping sets of pins between a [Package Model] and
an [Interconnect Model Set Selector]. Arpad asked why we would want to allow
overlapping models. Michael noted that in some cases only the [Package Model]
format might be supported in an EDA tool. Bob noted that the EDA tool and
user should be able to make a selection between the model types. Michael
commented that we are restricting the model makers to support both formats in
the case that EDA tools do not yet support the Interconnect Models. Arpad
asked if the model maker is not allowed to provide overlapping sets, then this
disallows the model makers from modeling only a high speed bus with an
[Interconnect Model Set Selector]. Walter thought we should not restrict the
models in this way. Arpad suggested to add a note to this section to state
that EDA tools should not be expected to support multiple package formats
simultaneously.
Bob raised an issue where [External Circuit] is not valid for power integrity
simulation. He proposes to remove [External Circuit] from the Rules of
Precedence. Michael suggested to highlight the sentence in question and come
back to it.
In the new figure, Bob suggested to put "Die Pad" on a single line. Arpad
asked about the term "Die Pad Terminals". He suggested to use just "Die Pads".
He noted that "Buffer Terminals" is okay, since it is specific to the terminals
rather than the buffer contents.
Randy had a few comments that he added in his review of the BIRD draft. The
first is in regards to some repetitive sentences in the Chapter 12.1 sections.
Michael removed these repetitive sentences.
Randy also had a comment suggesting to add text describing the interconnect
routing figure. Michael added some description text to the document for this
figure.
Randy asked about the color of the highlighted pads in one of the pictures
which are mislabeled as black. Arpad asked if the IBIS specification will be
in color or black and white. Michael stated that the IBIS specification is
generally consumed electronically, and he thought having color should be okay.
Bob suggested that the picture of the routing is a bit busy and suggested
replacing it with a simpler drawing.
Bob suggested to remove the phrase "SPICE deck" from the introductory text on
Touchstone file instances.
Arpad asked how close we are to complete and if anything can be announced at
the upcoming Summit meeting. Michael mentioned that we still have significant
work before submitting the BIRD to the IBIS Open Forum, but he thought the work
being done by this group can be discussed at the Summit meeting. Bob added
that he still has some additional comments on the BIRD.
Mike moved to adjourn. Arpad seconded. The meeting adjourned without
objection.
