[ibis-macro] Minutes from the 2 Apr 2013 ibis-atm meeting
- From: Mike LaBonte <mike@xxxxxxxxxxx>
- To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 9 Apr 2013 14:18:58 -0400
Minutes from the 2 Apr 2013 ibis-atm meeting are attached.
Mike
IBIS Macromodel Task Group
Meeting date: 2 April 2013
Members (asterisk for those attending):
Agilent: Fangyi Rao
* Radek Biernacki
Altera: * David Banas
Julia Liu
Hazlina Ramly
Andrew Joy Consulting: Andy Joy
ANSYS: Samuel Mertens
* Dan Dvorscak
* Curtis Clark
Steve Pytel
Luis Armenta
Arrow Electronics: Ian Dodd
Cadence Design Systems: Terry Jernberg
* Ambrish Varma
Feras Al-Hawari
Brad Brim
Kumar Keshavan
Ken Willis
Cavium Networks: Johann Nittmann
Celsionix: Kellee Crisafulli
Cisco Systems: Ashwin Vasudevan
Syed Huq
Ericsson: Anders Ekholm
IBM: Greg Edlund
Intel: * Michael Mirmak
Maxim Integrated Products: Mahbubul Bari
Hassan Raghat
Ron Olisar
Mentor Graphics: * John Angulo
Zhen Mu
* Arpad Muranyi
Vladimir Dmitriev-Zdorov
Micron Technology: Randy Wolff
Justin Butterfield
NetLogic Microsystems: Ryan Couts
Nokia-Siemens Networks: Eckhard Lenski
QLogic Corp. James Zhou
SiSoft: * Walter Katz
* Todd Westerhoff
Doug Burns
* Mike LaBonte
Snowbush IP: Marcus Van Ierssel
ST Micro: Syed Sadeghi
Teraspeed Consulting Group: Scott McMorrow
* Bob Ross
TI: Casey Morrison
Alfred Chong
Vitesse Semiconductor: Eric Sweetman
Xilinx: Mustansir Fanaswalla
Ray Anderson
The meeting was led by Arpad Muranyi
------------------------------------------------------------------------
Opens:
- None
--------------------------
Call for patent disclosure:
- None
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Review of ARs:
- Walter send BIRD priority spreadsheet to Mike for posting
- Done
- Arpad create example for BIRD 160
- Done
- Arpad try to apply BIRD 158 shortcut language to his BIRDs 116-118
- In progress
- Walter write new BIRD for repeater/retimer pin keywords
- In progress
-------------
New Discussion:
Arpad: There may be no interconnect meeting tomorrow
- Michael M: I am unable to run it
- Walter set up a WebEx for it
- Randy can take minutes
- Arpad: I can run the meeting using the existing meeting setup
- Michael M: I will send an updated invitation
- Michael M: Last week we reviewed EMD
- Comments are welcome
- EMD examples are expected this week
Analog BIRDs:
- Arpad showed bird160.ibs
- Arpad: An [External Model] has been added to the bird158 example
- Parameters from an AMI file are used
- Arpad showed BIRD 158 and highlighted a sentence explaining voltage handling
- Arpad: To be correct we would have to us -Tx_V or -1*Tx_V for Vtx_l
- That is not allowed by the specification
- That is the only part that doesn't work
- Arpad: The AtoD converter is not strictly needed here
- The IBIS spec requires it though
- It does help out by establishing node names
- Walter: I think full paths to parameters are needed
- Also the Tx_V values need to be divided by two
- The transformation from 0 to 1 to -0.5 to 0.5 should be OK because
everything
is LTI
- Is A_gnd required?
- Radek: It is required
- Bob: We have to make sure the s-parameters are not floating
- Arpad: There is a question about what is ground for IBIS
- Walter: on Ports there are two reserved and two non-reserved names
- How do you tell which are the high and low sides?
- Arpad: The names are in the subckt definition
- Walter: What is my_ref?
- Arpad showed the IBIS 5.1 spec
- Arpad: It is the reference side of the receive path
- It probably should be A_gnd (Arpad made this change)
- Walter: The Inverting and non-Inverting keywords are the only thing
that allow correct hookup of P and N
- Radek: This does not define active low and active high
- Arpad: We are mainly interested in identifying the P and N sides
- Bob: This would be either a single model with two pin names or two models
- Only with [Diff Pin] would we know which one it is
- True differential is new to IBIS
- We might need a keyword for it
- Radek: If this is true diff that might simplify the +/- issue
- Arpad: I think the IBIS spec discusses true differential
- If there is ambiguity that is a separate topic
- We should not hold up this BIRD for that
- Bob: This references BIRD 158, but it could directly reference a Touchstone
file
- Arpad: BIRD 158 defines names like Tx_V but I am using them as non-reserved
names here
- Arpad showed the AMI file for the example
- Arpad: The ISS subckt will pick up whatever types the parameters are
- Radek: It would be better not to use names used in BIRD 158
- Walter: Does this BIRD assume BIRD 158 is approved?
- Arpad: No
- Bob: It might be redefined with the block itself
- Ambrish: Agree with Bob, nothing says it has to be an AMI file
- Bob: We could force it to be within the same IBIS file
- Arpad: BIRD 153 is for that
- Radek: Arpad is showing a connection between BIRDs 158 and 160
- Walter: We need to address the problem we are trying to solve here
- We need to have values that change with certain conditions
- For example with Tstonefile different s4p files are chosen
- Radek: Dependencies are a challenging issue for BIRD 160
- The mechanisms to do it are not in place
- Ambrish: We will be dealing with BIRDs about dependencies
- Walter: If BIRD 160 is an alternative these issues should be resolved
- Arpad: With that BIRD we would use an output parameter from the DLL
- Bob: I have technical comments that could be emailed
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Next meeting: 09 Apr 2013 12:00pm PT
Next agenda:
1) Task list item discussions
-------------
IBIS Interconnect SPICE Wish List:
1) Simulator directives
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