[ibis-macro] Minutes from the 9 Apr 2013 ibis-atm meeting
- From: Mike LaBonte <mike@xxxxxxxxxxx>
- To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>
- Date: Wed, 10 Apr 2013 20:56:35 -0400
Minutes from the 9 Apr 2013 ibis-atm meeting are attached.
Mike
IBIS Macromodel Task Group
Meeting date: 9 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
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Opens:
- None
--------------------------
Call for patent disclosure:
- None
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Review of ARs:
- 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:
Interconnect Task Group report:
- Arpad: We reviewed EMD and examples thereof
BIRD 160 Analog buffer modeling:
- Arpad showed a copy of BIRD 160 annotated by Bob Ross
- Bob: a change was made to the tree hierarchy
- There should be only one equal sign per line
- Parameters should be defined on separate lines
- We should not have a second way to denote defaults
- Arpad: That only applies to multi-value parameters like lists
- It does not make any assignments, it is only for making a selection
- Bob: If we miss an assignment in a tree that is an error
- Arpad: Is the definition for Boolean OK?
- Bob: That is OK
- Radek: Agree
- Arpad: I will change it to require a new line for each parameter
- Radek: There is another default inside the ISS subckt
- Arpad: If the model has no default anywhere, simulators may have error
conditions
- Mike: If a default is not defined tools will make assumptions
- Todd: In HSPICE it is an error to call a subckt with a parameter having no
value
- Arpad showed an example of a .subckt with a parameter
- Walter: If there is no "=" value it looks like a node, not a parameter
- Arpad: Having the feature does not protect us
- Radek: We would have to check if this applies to IBIS-ISS
- Arpad: We need to decide whether to have the default syntax
- Bob: We should not have it if it is not required
- Arpad show an IBIS-ISS example
- Arpad: This shows a default value for "MyTfall MyTrise" after a space
- Mike L: What do the space separated names ahead of "=" do?
- Arpad: It was an assignment to both parameters, but we will change to not
allow that
- Bob: There is a problem with Polarity, only D_drive supports this
- There needs to be a "non-inverting" for each "inverting"
- Arpad: That may be too restrictive
- A subckt with its own inverter would not require an inverted input
- Bob: These would only be for externally controlled nodes
- Arpad: For inverting Vlo would be greater than Vhi
- Radek: If a parameter is added we would have to address that
- Arpad: There is a Vhi/Vlo requirement, the inverting/non-inverting keywords
make it simpler
- Walter: Vlo, Vhi, and Vdiff are at the pad, but [External Model] for a
receiver is different.
- There are other measurement points to be considered
- Arpad: This is about Vhi/Vlo, bot Vinl/Vinh
- I will change this section
- Should Bob's comment be kept?
- Bob: That has just a poor way of explaining it
- With this at least the Typ line is required
- The parser developer will have to be informed
AR: Arpad update BIRD 160 draft with Bob's comments
Repeater BIRDs:
- Fangyi: I need to talk with Walter
- We are optimistic about finding a way to merge the two
- Arpad: We will reserve the next meeting for this topic
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Next meeting: 16 Apr 2013 12:00pm PT
Next agenda:
1) Task list item discussions
-------------
IBIS Interconnect SPICE Wish List:
1) Simulator directives
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