eldo_user

IBIS Models Support in Eldo
IBIS Package
IBIS Package
Instantiates an IBIS package model name within the specified IBIS file.
Syntax
_IO_xx file="path" pkg_model="package_model_name"
+ [ibischk_soft=NO|YES]
Parameters
• _IO_xx
IBIS instance name.
• file="path"
Specifies the path to the file that contains an IBIS formatted model.
This can be the full path (for example, /user/test/Models/model.ibs), a relative path, or just a
file name. Both / and \ should be acceptable as separators in the path name (for the UNIX
and NT versions). Avoid any spaces between the quotes and the file name/path. An Eldo
option IBIS_SEARCH_PATH is available to specify the path to the directory to search for
the IBIS files.
• pkg_model="package_model_name"
Specifies an IBIS package model name within the specified IBIS file. package_model_name
is case-sensitive.
• ibischk_soft=NO|YES
Used to control the golden parser (ibischk) reporting of IBIS version compatibility errors.
Setting to NO means the IBIS version number is checked for compatibility. Only the first
digit of the version number is checked, for example 4.x. Setting to YES releases ibischk
constraints on the IBIS version number. Default is NO.
Description
Equivalent subcircuit
For each IBIS instance that represents an IBIS package model, Eldo will create an equivalent
subcircuit that contains sets of loss-less/lossy transmission lines and/or discrete RLC
components.
Naming rules
External nodes of the equivalent subcircuit will be generated automatically by Eldo. Each pin in
the package model will be represented by two external nodes; one at the die-pad side and the
other one at the package-pin side. The naming of these pins follows the rules below:
• Node at die side:
Eldo® User's Manual, 15.3 773