eldo_user

IBIS Models Support in Eldo
IBIS Component
Keep the scaling factors as calculated.
YES
Limit the switching scaling factors between 0 and 1.
Switching scaling factors are extracted from the rising/falling waveforms, and used to
modulate the output current of the buffer while switching.
o
o
Scaling factor 0 indicates fully off for the working network.
Scaling factor 1 indicates fully on.
Sometimes these factor values exceed one or become negative, causing a negative slope,
that may lead to some convergence problems.
Note
The POWER setting helps to avoid non-convergence issues whilst keeping the
correct buffer behavior on the a_signal terminal.
• corner=TYP|MIN|MAX|FAST|SLOW
Specifies the IBIS corner to be used to extract the data from the IBIS file. The default is
corner=TYP—if any data is missing under the Min or Max columns in the IBIS file then
the Typ column value will be used instead. When corner=TYP, MIN, or MAX, simulation
will extract the data under the corresponding Typ, Min, and Max columns in the IBIS file.
When corner=FAST or SLOW, corner uses combinations from data under the Min and
Max columns; FAST is the same as MAX, and SLOW is the same as MIN except for
parameters listed in Table 17-5.
• warn=ON|OFF
Specifies if the warning message generated for this instance should be printed (ON), or
suppressed (OFF). Setting warn=OFF is equivalent to using the keyword nowarn. The
default setting is ON.
• nowarn
This is equivalent to warn=OFF.
• msel_mode=value
The value indicates a model order under the [Model Selector] keyword in the IBIS file. If
the value specified is greater than the model selector list, then the first model will be
selected. The default is 1.
• model_selector='mod_sel1=mod_name1 [, mod_sel2=mod_name2 ,...]'
This keyword can be repeated more than once. model_selector is used to select models for
some or all model selectors in the given IBIS file. model_selector has a higher precedence
over msel_mode.
• package=0|1|2|3|4|OFF|CMPNT|PIN|PKGMOD|MIX
This keyword specifies the package modeling type to be used for package parasitics.
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Eldo® User's Manual, 15.3