eldo_user

IBIS Models Support in Eldo
Component
Figure 17-14. Series Pin Mapping
IBIS defines two categories of series elements; series and series switch. Series and series switch
are identical in their elements. The only difference is that series switch can be switched ON or
OFF. Series switches are divided into groups, and the group name to which the series switch
belongs to, is defined in the function_table_group column in the IBIS file. The [Series Switch
Groups] keyword is used to define switching combinations of series switch groups. You can
specify the state of some groups to be ON and it is implicitly assumed that unspecified groups
are OFF, or vice versa.
Node Declarations and Circuit Call
The [External Circuit] keyword enables you to define any block behavioral models, written in
SPICE or Verilog-A, with any number of ports and with any functionality.
The connectivity of these blocks to each other, to die nodes or die pads, must be defined using
the [Node Declaration] and [Circuit Call] keywords. Only one [Node Declarations] keyword is
permitted for each [Component] keyword. Multiple [Circuit Call] keywords may appear under a
[Component] using the same [External Circuit] name if multiple instantiations of an [External
Circuit] are needed.
Related Topics
IBIS Component
Supported Keywords and Sub-Parameters
Eldo® User's Manual, 15.3 747