[ibis-macro] Minutes from the 27 Mar 2012 ibis-atm meeting
- From: Mike LaBonte <mike@xxxxxxxxxxx>
- To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 27 Mar 2012 16:15:08 -0400
Minutes from the 27 Mar 2012 ibis-atm meeting are attached.
Mike
IBIS Macromodel Task Group
Meeting date: 27 March 2012
Members (asterisk for those attending):
Agilent: * Fangyi Rao
* Radek Biernacki
Altera: * David Banas
Ansys: Samuel Mertens
Dan Dvorscak
Curtis Clark
Arrow Electronics: Ian Dodd
Cadence Design Systems: Terry Jernberg
* Ambrish Varma
* Feras Al-Hawari
Celsionix: Kellee Crisafulli
Cisco Systems: Ashwin Vasudevan
Syed Huq
Ericsson: Anders Ekholm
IBM: * Greg Edlund
Intel: Michael Mirmak
LSI Logic: Wenyi Jin
Maxim Integrated Products: Mahbubul Bari
Mentor Graphics: John Angulo
Zhen Mu
* Arpad Muranyi
Vladimir Dmitriev-Zdorov
Micron Technology: Randy Wolff
NetLogic Microsystems: Ryan Couts
Nokia-Siemens Networks: * Eckhard Lenski
QLogic Corp. * James Zhou
Sigrity: Brad Brim
Kumar Keshavan
* Ken Willis
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
The meeting was lead by Arpad Muranyi
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Opens:
- None
--------------------------
Call for patent disclosure:
- None
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Review of ARs:
- Bob send discussion of s-param boundary conditions calculation
- Done
- Arpad to write a new revision of BIRD 117 and 118 to generalize references
to parameters in files (.ami or any)
- in progress
- Ambrish update BIRD 145 for pad to pin mapping and other clarifications
- Need to say what it will not solve
- in progress
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New Discussion:
Arpad showed a draft update of BIRD 117.4:
- Arpad: The rewrite of "Statement of the Resolved Specification" was extensive
- Examples from BIRD 116 are modified here
- "TreeRootName" is the name actually used in the root of the AMI file
- AMI content can be in this file or external
- The search order is similar to that for package models
- An error (".END" should be "[END]") will be fixed
- Placing AMI content after [END] should help parsers.
- Walter: Does the [Algorithmic Model] root name have to match the AMI root
name?
- Arpad: Yes
- Radek: Placing it before [END] would be syntactically more consistent
- There could be confusion if defined in multiple places
- Arpad: There is a hierarchy
- Feras: If there is no AMI model it has to be in the IBIS file?
- Arpad: It can be in a .par file
- Feras: Could we have model specific parameter trees for multiple models?
- Walter: There can be multiple tree root names at the end
- Arpad: It's like [Define Package Model], which can appear multiple times
- Walter: AMI params can have hierarchical levels
- There must be a way to refer to items at different levels
- Taps are an example
- Also we should be able to refer to either Model_Specific or Reserved
- Radek: How would a List item be selected?
- Arpad: The GUI will have to offer a choice
- Fangyi: Why do we need the param tree in the IBIS file?
- The value can just be assigned as a literal
- Ambrish: It is more flexible because there can be choice by corner, etc.
- Radek: It is fine to have that flexibility
- Arpad: There might have to be different rules about which keywords are
required
- Feras: This could be more flexible on that
- James: Why separate Parameters and Converter_Parameters?
- Arpad: The rules are a little different
- In one case an assignment is required, the other not
- Walter: Converter_Parameters are not passed to the subckt
- MyVlow and MyVHigh would have to be reserved
- James: It only has to look up in the file to find the value
- Walter: It is the subckt instance that will be looking for it, no IBIS file
there
- James: What if I used Converter_Parameters for sp_file_name?
- Arpad: Converter_Parameters can only be numeric
- James: If a value is undefined how do you use it?
- Arpad: The user can set it with the GUI
- Walter: There is a problem that the root name is not the AMI file name
- Radek: You could point to the file which has multiple trees
- Arpad: The AMI files have to be in the same directory
- Walter: There is confusion that there is an AMI file for each DLL
- Fangyi: What if different files have the same variable?
- Arpad: The problem is where two files have the same root name
- Feras: We would want to reference the file name explicitly
- Walter: There could be a virtual file name keyword for embedded content
- Ambrish: It could be just the IBIS file name
- Bob: If embedded it should be surrounded by square bracket keywords
- Is this equivalent to an AMI file?
- Arpad: We should not use embedded content for AMI models
- Feras: Giving the file name solves the problem
- Arpad: It would be better not to
- James: Can we use this to ask which s-params to use?
- Arpad: Dependency tables can do that
- Walter: This is resubmitted as BIRD 150
- Fangyi: The purpose is to allow multiple values for a parameter?
- Arpad: The purpose is to keep things in one file
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Next meeting: 03 Apr 2012 12:00pm PT
Next agenda:
1) Task list item discussions
-------------
IBIS Interconnect SPICE Wish List:
1) Simulator directives
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