Subject: [IBIS-Users] Creating 3 sets of R/F Waveforms
From: Jose G Corona (jcorona@artisan.com)
Date: Mon Aug 18 2003 - 11:37:41 PDT
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
-- Jose G. Corona Analog/Mixed-Signal Business Unit ARTISAN COMPONENTS, INC. Tel: (858) 731-3428 Fax: (858) 457-5578www.artisan.com
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