====================================================================== 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 October 12 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. Review of Minutes: - Michael called for review of the minutes from the September 28 meeting. Mike moved to approve the minutes. Arpad seconded. The minutes were approved without objection. - Michael called for review of the minutes from the October 5 meeting. Randy moved to approve the minutes. Bob seconded. The minutes were approved without objection. Review of ARs: - Michael to check for consistency in capitalization of words and phrases. - He has put together a list of terms to go over in this meeting Opens: - None List of terms: Michael shared a list of terms used in the document, many of which are capitalized. Bob asked how these terms were selected. Michael commented that he went through each page of the document looking for nouns used as terms, but afterwards he did a sort of that list to remove the duplicates. Thus, the order of the list is based on an ASCII sort. Bob stated that the bracketed keywords look correct. Michael also noted that he highlighted mistakes and typographical errors in yellow. Bob noted that the Buf_Ext_Ref, Buf_GC_Ref, Buf_PC_Ref, Buf_PD_Ref, and Buf_PU_Ref should be changed to the [Receiver Threshold] naming convention. A search and replace should be done to the document to reflect this change. Also the Buf_I/O term should be consistent with the other BIRDs in the works which refer to Buffer_I/O. Mike noted that Buffer_Pin is only used in figure captions. Bob commented that we should avoid using the underscore if it is not an official subparameter. Bob asked about the terms "Component" and "Component PCB" and where they are used. Michael asked about how these should be classified. He commented that it might be good to classify each of the terms. Bob also asked about the terms "Die", "Die Pad", and "Pin" in regards to how they correspond to the Timing_location and Si_location [Component] subparameters. He thought we should use the word "Pad" instead. And, that we have "Die" and "Die Pad" meaning the same thing, but we should be consistent. Michael took an AR to classify the terms in the list and note any possible changes needed. Bob commented that signal_name should be lower case, since it is lower case as a column heading for the [Pin] keyword. It could become upper case if it begins a sentence, but we should craft language to avoid that. Bob noted that, in general, we can make enumerated names plural. Michael agreed and noted that some of the terms with both plural and singular versions might be comments that we can eliminate when the classification is done. Mike noted that the terms "rail" and "supply" are used interchangeably in the document. "Supply" is mostly used in the keywords, while "Rail" is used in the text. He asked if there is any rationale for using one versus the other. Bob agreed that we should take a look at their usage, and he thought we could better define these terms. Mike wondered if the terms have been put in by different editors of the document. Mike took an AR to discuss this with Walter and get his thoughts on the wording. Bob asked if both "rail" and "supply" are used in the IBIS specification. Michael thought they are used interchangeably in the IBIS specification. Mike commented that at a minimum something should be done to define these terms. Interconnect BIRD draft 41 Review: Radek asked about the Unused_terminal_termination. He commented that the term Unused_port_termination would be more appropriate. Michael asked if we need to add a description of IBIS-ISS nodes under the Terminal_number sections. He asked if this is correctly defined in the current BIRD draft. Bob noted that the Unused_port_termination changes the circuit, but it is a convenient way to handle the case when there are no connections. The only real need for this is when you have a true Touchstone file, then you could use this to terminate the unused ports. Bob asked if the Unused_port_termination is missing, do the unused ports default to terminate with the reference impedance. Radek commented that the default should be to leave unused ports open. He thought it would be okay for the model makers to terminate to the port impedance. Bob commented that we should add a note about this to the document. Michael agreed and stated that he would work with Bob off-line to put something together. Mike moved to adjourn. Bob seconded. The meeting adjourned without objection.