Subject: RE: [IBIS-Users] Creating 3 sets of R/F Waveforms
From: Ambrish Varma (akvarma@ncsu.edu)
Date: Mon Aug 18 2003 - 13:26:05 PDT
Hi Jose,
My understanding is that you can generate 100 R/F waveforms. I have
tested the latest (s2ibis3 beta) to generate multiple R/F waveforms and
I am pretty sure that s2ibis2 will also do the same.
Would be glad to help you out if you gave me more specific details.
-Ambrish.
Ambrish K Varma
akvarma@ncsu.edu
ph(919)513-2015
fax(919)515-2285
-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Jose G Corona
Sent: Monday, August 18, 2003 2:38 PM
To: ibis-users
Subject: [IBIS-Users] Creating 3 sets of R/F Waveforms
Hello IBIS-users,
I am trying to generate ibis model for SSTL, this IO has termination
resistor of 50 Ohm connected to VDD/2. While looking into many other
ibis models from different providers, I have found that there are
always
two termination voltages (0 and VDD or 0 and VDD/2). I want to create
an ibis model with three termination voltages "0, vdd/2 and vdd". But
the tool (North Carolina Univ's tool) only generates the waveforms for
the first two but not the third.
Is it possible for UNC s2ibis2 to create 3 sets of R/F waveforms?
Also, I am not sure whether it is ibis-complaint to have three
termination voltage schemes?
In the s2i tech file , I have using following lines
-----------------------------------------------------
rising_waveform1 = [Rising waveform] 50 0 NA NA NA NA NA NA NA
falling_waveform1 = [Falling waveform] 50 0 NA NA NA NA NA NA NA
rising_waveform2 = [Rising waveform] 50 1.25 NA NA NA NA NA NA NA
falling_waveform2 = [Falling waveform] 50 1.25 NA NA NA NA NA NA NA
rising_waveform3 = [Rising waveform] 50 2.5 NA NA NA NA NA NA NA
falling_waveform3 = [Falling waveform] 50 2.5 NA NA NA NA NA NA NA
----------------------------------------------------------
Thanks for your precious time and I will really appreciate your
response.
-Jose
|------------------------------------------------------------------
|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
This archive was generated by hypermail 2b28 : Mon Aug 18 2003 - 13:28:27 PDT