RE: [IBIS-Users] IO, output, Input buffers

From: Tom Dagostino <tom_at_.....> Date: Sun May 21 2006 - 16:57:52 PDT · This archive was generated by hypermail 2.1.8 : Sun May 21 2006 - 16:59:42 PDT

No

For output only remove the Vinh and Vinl lines.  Leave the clamp curves in
the output model.

Tom Dagostino
Teraspeed(R) Labs
13610 SW Harness Lane
Beaverton, OR 97008
503-430-1065
tom@teraspeed.com
www.teraspeed.com

Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
401-284-1827

-----Original Message-----
From: owner-ibis-users@server.eda.org
[mailto:owner-ibis-users@server.eda.org]On Behalf Of Abdulrahman Rafiq
-X (arafiq - Digital-X, Inc. at Cisco)
Sent: Saturday, May 20, 2006 1:14 PM
To: mithlesh.shrivas@freescale.com; ibis-users
Subject: RE: [IBIS-Users] IO, output, Input buffers

 Mithlesh,

Yes, you are correct.

The I/O model_type will consist of the following V/I anf V/T tables

Pullup
Pulldown
Gnd clamp
Power clamp
Riseing waveforms
Falling waveforms

For output only model_type, remove the ground and power clamps.

For Input only model_type, remove the pullup, pulldown, rising and
falling waveforms.

Hope this helps. Feel free to ping me if you have any other questions.

Thanks,

Abdul Rahman Rafiq
Hardware/Signal Integrity Engineer
Cisco Systems, Inc. Central Engineering
ASIC's Signal Integrity & Packaging Design Group
Phone: (408) 527-5540
Email : arafiq@cisco.com

-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Mithlesh Shrivas-r64034
Sent: Saturday, May 20, 2006 5:21 AM
To: ibis-users
Subject: [IBIS-Users] IO, output, Input buffers

Hello Experts,

I use [model selector] to select different models for pins. Few pins are
I/O, Output only and Input only.
The output only models do not have power/ground clamp curves and Input
only models have only clamp curves. i.e.
if i remove particular section, i can convert a IO model to output/Input
models, right?

Now, do i need to separately define Output & Input only models to
particular pins or I use the IO type model for them as well?

-----------------
[model selector]     io_type
IO models

[model selector]    output_type
Output models (or IO models ???)

[model selector]     Input_type
Input models (or IO models???)

-----------------

Highly appreciate your quick response.

Thank you!
Mithlesh

--
---" "----------------------------" "--.
Mithlesh Shrivas (Core-id:R64034).......
Design Engineer.........................
Freescale Semiconductor India Pvt. Ltd..
Express Trade Towers....................
Floor Nos. 5, 6 & 7, Plot# 15 & 16......
Sector- 16A, Noida- 201301 U.P. (India).
Mobile: +91-9811824928..................
Office: +91-120-439 (extn) 6149.........
----------------------------------------
___________________
POPI Classification:
===================
[ ] Public
[X] Freescale Internal Use Only
[ ] Freescale Confidential Proprietary

"Analog circuit design is like chess -just because you know how the
pieces move doesn't mean you know how to play the game." --PATRICK M.
LAHEY "To become expert in analog circuit design, one should have
`POWERFUL URGE TO LEARN'
and attitude of doing things Properly, Intelligently and Systematically,
i.e., Intellectually" -- myself

|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just the appropriate command message(s) in the body:
|
|  help
|  subscribe   ibis       <optional e-mail address, if different>
|  subscribe   ibis-users <optional e-mail address, if different>
|  unsubscribe ibis       <optional e-mail address, if different>
|  unsubscribe ibis-users <optional e-mail address, if different>
|
|or email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
|  http://www.eda.org/pub/ibis/email_archive/  Recent
|  http://www.eda.org/pub/ibis/users_archive/  Recent
|  http://www.eda.org/pub/ibis/email/          E-mail since 1993