Minutes from the 25 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 25 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 January 18 meeting. Walter
Katz moved to approve the minutes. Bob Ross seconded. The minutes were
approved without objection.
Review of ARs:
- Michael to send out draft 47 of the Interconnect BIRD.
- Michael reported this is done.
- Michael to prepare a status update for the summit meeting.
- Michael reported this is done.
Opens:
- None
IBIS Interconnect Task Group Update Presentation:
On the title slide, Bob suggested for Michael to add his affiliation.
Bob suggested, on slide 5, to use the terms pin_name, signal_name and bus_label
with the underscore. Also, on slide 8, Bob suggested to clarify that we are
looking at the terminal locations of buffer, die pad or pin. Mike LaBonte
suggested to use the term interface or connection point. Bob suggested to
change to pin_name, signal_name, pad_name and add "or bus_label". On slide 14,
Bob suggested to change to pad_names and signal_names with the underscore.
Michael mentioned he will change the presentation to use an IBIS centric
template. Michael noted the example on slide 10 has multiple buffer terminals
for VDDQ and VSSQ, while there is only one terminal for each on the pins side.
Walter suggested to show the VDDQ and VSSQ interconnect connecting outside of
the Die Pad Terminals box, in order to make the one pin to multiple buffer rail
terminals clear.
Michael asked if the example on slide 12 looked correct. Walter thought it
needed the same change as the example picture on slide 10. Walter noted that
[Die Supply Pads] allow the model to have distributed power. The simple way to
connect the supply rails is to use signal_name, while for complex power
delivery networks pad_names can be used.
Bob suggested, on slide 15, to change the wording for the first sub-bullet.
Bob's concern is in regards to the term "shorted", which is usually the case,
but it is not always the case.
Interconnect BIRD draft 47:
Walter asked about a functional change that Bob had possibly made in the draft
47 version he sent out. Bob replied that it was related to the second column
of [Bus Label], but that it was more of an editorial change for clarification.
Mike stated he had sent out a difference document that shows only the changes
that Bob made.
On page 12, Bob had a comment on the figure asking about what the different
colors represent. Walter noted that some of the pictures were examples only,
and he recommended to change them in an editorial pass.
Bob made some clarifications to the Aggressor_Only section in his draft. He
commented that it would be good to clean up the language in this section for
clarity.
Walter suggested for Michael and Mike to finish up the document and create a
formal draft to be sent out for a final pass by this group. Michael agreed.
Walter suggested for everyone to send an email if they approve of the document.
Bob stated that if major changes were needed, we should wait to submit the BIRD
to the IBIS Open Forum.
Walter made a motion to have a formal draft 48 prepared based on the changes
discussed in this meeting, circulate it to the committee members, and if there
are no major changes, submit it to the IBIS Open Forum. Bob seconded. There
were no objections.
There will be no meeting on February 1, 2017 due to DesignConn.
Bob moved to adjourn. Mike seconded. The meeting adjourned without
objection.
