======================================================================

IBIS INTERCONNECT TASK GROUP
http://www.ibis.org/interconnect_wip/ 
Mailing list: ibis-interconnect@freelists.org 
Archives at http://www.freelists.org/archive/ibis-interconn/ 

======================================================================

Attendees from March 22 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 February 22 meeting.  Mike
  LaBonte moved to approve the minutes.  Bob Ross seconded.  The minutes were
  approved without objection.


Review of ARs:
- None

Opens: 
- None

BIRD189.1 Draft 3:
Michael showed the BIRD draft.  It corrects minor editorial issues.  New figures from Randy
Wolff have been inserted.  Michael said the new figure is useful to illustrate crosstalk and
Aggressor_only.  The two outer lines might be labeled Aggressor_only.  Bob said "Path" should
be "Paths" in the figure caption.  He asked why those lines might be labeled Aggressor_only.
Michael said the paths at the edge do not model crosstalk contributors on the other side.
Mike suggested it should be noted that these four paths are actually part of a wider bus.
Bob noted that every other line could be Aggressor_only, because the spec does not constrain this.

Arpad suggested that the word "connections" should be changed to something else.  Michael
suggested it might be "terminals".  Walter said connections are usually everything on a signal
name, connected by some low impedance, and that that should not be confusing.  Mike asked if
Aggressor_only needed to be only on one terminal of a path.  Walter said that if one is found
on a signal the entire signal is Aggressor_only.  Michael edited the text to clarify the usage
of Aggressor_only.

Bob noted that the parser will not care if all terminals on a path have Aggressor_only.
Mike suggested that if a model implements no coupling at all then every terminal might be
Aggressor_only.  Arpad asked if an Aggressor_only line can be used for uncoupled analysis.
Walter said it could.  Michael showed the Aggressor_only definition in the BIRD.  Bob said
that it was an informative parameter.  Arpad said the second sentence of the text implied that
Aggressor_only means the coupling is there.  Michael noted that one sentence had the opposite
of the intended meaning. He changed the word "omit" to "include".  He also changed "document"
to "indicate incomplete".  Michael said If all models had all coupling then Aggressor_only
would never appear.  Arpad suggested that the second sentence should have "full coupling".
Michael said the second sentence should also have "that are not included".  Mike suggested
changing the second instance of "document" to "indicate"?

Michael showed Table 41.  Bob suggested that the horizontal table border lines between groups
could be thicker to separate the groups.  Michael said we also needed to consistently follow
the order pin, signal, bus, pad.  Some sections in the outline above were not consistent.
Michael made the edits.

Michael showed the Unused_port_termination rules.  He said Radek had suggested we state that
EDA tools can do what they want for unused terminals.  It now states that they technically
remain open, but adjustments might be made to avoid numerical issues.  Bob noted that we did
not specify using a 1MOhm resistor as in the original version.  Michael noted that the only thing
we had not completely resolved was the Aggressor_only language.

Bob suggest that figure 42 should have annotations to show the Aggressor_only lines.  Randy
suggested that that might go in the bottom right corner of the figure.  Bob said it should be
clear that it's optional.

Michael said the updated BIRD would be sent out as draft 4, and that suggested edits for the
Aggressor_only section would be sent and discussed by email.  We decided there would be no meeting
the following week, but the draft 4 version most likely would be submitted to the Open Forum.

Mike moved to adjourn.  Bob seconded.  The meeting adjourned without objection.