Subject: RE: [IBIS] IBIS models for Intel LXT971A and LXT9785 Ethernet PHYs
From: Tom Dagostino (tom@teraspeed.com)
Date: Tue Feb 11 2003 - 08:46:21 PST
Brad
In this case the driver is more analog than most. I believe it has 3
levels.
IBIS 4.0 and prior was set up for full swing signals and cannot model
intermediate levels. With the inclusion of BIRD 75 you should be able to
model and simulate these signals.
Tom Dagostino
Teraspeed Consulting Group LLC Teraspeed Consulting Group LLC
2926 SE Yamhill St. Device Modeling Division
Portland, OR 97214 13610 SW Harness Lane
Beaverton, OR 97008
http://www.teraspeed.com 503-430-1065
tom@teraspeed.com
-----Original Message-----
From: Brad Crowell [mailto:brad.crowell@amirix.com]
Sent: Tuesday, February 11, 2003 5:14 AM
To: tom@teraspeed.com; 'Hassan Ali'; ibis@eda.org
Subject: RE: [IBIS] IBIS models for Intel LXT971A and LXT9785 Ethernet
PHYs
Your reply brought a couple of questions to mind. First, with a little
tongue in cheek, aren't all IO analog in nature, which is the point of IBIS?
Second, more seriously, why can't IBIS be used to model these types of IO? I
have come across this probelm several times myself. With only an IBIS
simulator at my disposal for these types of problems, I don't have HSpice
and if I did it's doubtful that I could get the needed models, this leaves
me no means of simulating these cases.
Brad
****************************
Brad Crowell, P. Eng.
Senior Hardware Designer
AMIRIX Systems
Phone: 902-450-1700 Ext 287
Fax: 902-450-1704
www.amirix.com
****************************
-----Original Message-----
From: owner-ibis@eda.org [mailto:owner-ibis@eda.org]
Sent: February 10, 2003 5:29 PM
To: 'Hassan Ali'; ibis@eda.org
Subject: RE: [IBIS] IBIS models for Intel LXT971A and LXT9785 Ethernet PHYs
I believe you will find that these pins are really analog in nature not
digital. Thus no IBIS models for them.
Tom Dagostino
Teraspeed Consulting Group LLC Teraspeed Consulting Group LLC
2926 SE Yamhill St. Device Modeling Division
Portland, OR 97214 13610 SW Harness Lane
Beaverton, OR 97008
http://www.teraspeed.com 503-430-1065
tom@teraspeed.com
-----Original Message-----
From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org]On Behalf
Of Hassan Ali
Sent: Monday, February 10, 2003 12:50 PM
To: ibis@server.eda.org
Subject: [IBIS] IBIS models for Intel LXT971A and LXT9785 Ethernet PHYs
I've obtained IBIS models "lxt971a_q_mii_3_31.ibs" and
"lxt9785_q_rmii_3_3.ibs" of the above-mentioned devices through the
following link:
http://www.intel.com/design/network/products/ethernet/linecard_ept.htm
Unfortunately the IBIS model for LXT9785 device does not show which I/O
models should be used for the 100Mbps pins: TPFOP, TPFON, TPFIP, TPFIN. The
IBIS model for LXT971A does not show the I/O models for the TPFOP, TPFON
pins.
I need the models for those pins to be able to perform signal integrity
analysis of a magneticless link through a backplane.
Does anyone have info on the missing models? Are those the right IBIS model
files for my analysis?
Thanks.
Hassan.
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