User`s guide

4
-
20 Creatin
g
and Editin
g
Models
Runnin
g
the Parts Utilit
y
from
the Schematic Editor
If you want to:
• test behavior variations on a part, or
• refine a model before making it available to all schematics,
then run the Parts utility from the schematic editor in
Schematics.
This means editing models for part instances on your schematic.
When you select a part instance and edit its model, the schematic
editor automatically creates an instance model that you can then
change.
Note
You can only edit models for device types that the
Parts utility supports. See
Parts-Supported Device
Types on page 4-12 for details.
What is an instance model?
An instance model is a copy of the symbol’s original model. The
copied model is local to the design. You can customize the
instance model without impacting any other schematic that uses
the original symbol from the library.
When the schematic editor creates the copy, it assigns a unique
name that is by default:
original_model_name-Xn
where n is <blank 1 | 2 | ... > depending on the number of
different instance models derived from the original model for
the current schematic.
Once you have started the Parts
utility, you can proceed with
enterin
g
data sheet information
and model fittin
g
as described in
How to Fit Models on page 4-14.
For more information on instance
models, see
Reusing Instance
Models on page 4-39.