eldo_user

IBIS Models Support in Eldo
IBIS Buffers
Table 17-5. Exceptions to Fast=Max, Slow=Min Rule
Parameter/Data Fast Slow
C_comp Min Max
[Cac] Min Max
[Gnd Clamp Reference] Min Max
[Pulldown Reference] Min Max
[Package] Min Max
• power=ON|OFF
When power=ON (the default), the reference voltage sources are connected to the buffer
reference ports a_pcref, a_gcref, a_puref, a_pdref internally. When power=OFF you are
responsible for connecting the voltage sources externally, if you set power=OFF but do not
specify the power nodes in the _IO_ card, then OFF will be ignored and internal references
will be created.
Power nodes can be specified when power=ON to enable you to print/plot the values of
voltage sources connected to these nodes internally, in this case you must not connect
external voltage sources to these nodes.
• 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.
• c_comp_pu=value, c_comp_pd=value, c_comp_pc=value, c_comp_gc=value
These four keywords are optional. If one of these keywords is specified with a non-zero
value; the c_comp capacitor will be split up to four parts. Values are dimensionless numbers
between 0 and 1, and the sum of them should be equal to 1. The default is zero for the
unspecified values.
• use_fall_wvf= 0|1|2, use_rise_wvf= 0|1|2
0
Use the ramp for the falling/rising transitions.
1
Use one waveform for the falling/rising transitions.
2
Use two waveforms for the falling/rising transitions.
756
Eldo® User's Manual, 15.3