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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/ 

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Attendees from September 4, 2019 Meeting (* means attended at least using audio)

ANSYS                                Curtis Clark
Cadence Design Systems               Bradley Brim
Intel Corp.                          Michael Mirmak*
Keysight Technologies                Radek Biernacki
Mentor, A Siemens Business           Arpad Muranyi*
Micron Technology                    Justin Butterfield*, Randy Wolff*
SiSoft                               Walter Katz*, Mike LaBonte
Teraspeed Labs                       Bob Ross*


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 August 28, 2019 meeting. 
  Randy Wolff moved to approve the minutes.  Bob Ross seconded.  The minutes 
  were approved without objection.


Review of ARs:
- Walter Katz to make the approved changes and send out EMD draft 16.
  - Walter reported this was done.

- Mike LaBonte to send the IBIS 7.0 known issues document to Steve Parker for 
  posting the website.
  - Michael reported he does not see this on the website yet.  We will need to 
    verify this next meeting.
  
  
Opens:


EMD Draft 16 Review:
Michael asked about the open bin list item regarding the [Define Module] keyword.  
Bob replied he would like to defer the discussion on this, as he does not have a 
proposal on what to rename the keyword.  He has a few suggestions, but not a 
formal proposal.

Bob commented, in draft 16, "Electrical Module Description" was changed to "EMD 
Description".  Walter commented this was a global change and was changed by 
accident.  Walter will make the correction from "EMD Description" to "Electrical 
Module Description"  [AR].  Michael asked if the name "Electrical Module 
Description" has any use in any keywords.  Walter replied this is consistent with 
Electrical Board Description.  Bob commented the phrase should be "Electrical 
Module Description".  We have to be careful with EMD not just being a .emd.  Randy 
noted we need to make sure to define the EMD abbreviation on first use in the IBIS 
specification. 

Michael asked about the title of the BIRD.  Walter thought it is okay.  Randy 
suggested Electrical Module Description (EMD).

Michael asked if we are close to starting editorial edits.  Walter stated, in his 
opinion, the technical issues are resolved.  Bob commented one technical issue is 
the extended nets and if each extended net needs its own net name.  Walter 
commented the signal_name will likely be the CAD net name in the EMD pin list and 
the designator pin list.  Bob asked how the connectivity is determined.  Walter 
replied the signal_names match.  You may have a case of a series resistor, which 
form extended nets.  We may need some clarifications on signal_name, extended nets 
definitions, and CAD nets.  This is a documentation issue.  Bob stated we use 
signal_name for IOs, and we assume the signal_names for all the modules are the 
same.  He was concerned that the signal_names may be different for different 
instances in the database for the extended nets.  Walter stated he will review 
what is in the draft and propose a rewrite.  Bob suggested we might need a CAD net 
name to distinguish the names for the IOs.

Michael suggested we set a formal date for transitioning to editorial review.  Bob 
suggested it is premature to close out technical changes, as we may find 
additional technical issues.

Bob asked about Table 41, since we defined bus_labels, we should include 
bus_labels in the table.  He suggested to allow bus_labels here.  Walter noted 
these are bus_labels in the EMD file and not in the Interconnect Model.  Bob noted 
this is not clear and there is no reason for this description.  Walter noted the 
EMD does not know anything about what is inside the designator model.  Bob 
suggested bus_labels and signal_names can both be qualifiers.  Walter suggested to 
follow BIRD189 on this.  Randy agreed that the qualifiers can be bus_labels and 
signal_names.  Walter agreed this would be consistent with BIRD189, but we should 
be clear that EMD does not look into the IBIS component.  Bob suggested to change 
the title of Table 41 as it misleading.  Bob suggested bus_labels should be added 
as a Terminal_type_qualifier.  

Bob commented we need to clarify the interaction with Aggressor_Only of the EMD 
and Aggressor_Only inside the component.  Walter noted it was decided there was no 
interaction between the two.  He does not plan any changes on this.

Next Meeting:
The next meeting will be September 11.


Arpad Muranyi moved to adjourn.  Randy seconded.  The meeting adjourned without 
objection.

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Bin List:

EMD Comments to be Resolved:
1. Should the [Define Module] keyword be renamed?
2. Documentation of CAD nets, extended nets and signal names definitions.
3. Add bus_labels as possible Terminal_type_qualifiers


IBIS-ISS Parser:
- IBIS-ISS parser scope document