Packaging Options in Allegro System Capture
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Controlling Reference Designators with CPM
Directives
As soon as a component in Allegro System Capture is placed on the schematic sheet, a
Reference Designator (RefDes) is assigned to the component, and the design is
packaged.
Packaging in System Capture follows a simple RefDes numbering that you can configure
by defining a pattern. This enables you to easily trace the components in the design and,
if needed, make required changes. Packaging is not an additional post-design task. This
ensures errors that might get caught later, get resolved while creating the design.
System Capture provides the following project file (cpm) directives to configure the
RefDes pattern. These directives are specified in the START_CANVAS section of the
project.cpm file.
REF_DES_PATTERN
This directive specifies the format of RefDes assigned to the physical parts in the design.
The REF_DES_PATTERN directive applies to all parts in a design.
Note: To specify a pattern for a specific part or instance, use
the REF_DES_PATTERN property instead.
The REF_DES_PATTERN directive is applied only to parts that need to be packaged.
Existing packaged parts are not affected. In case the Reassign RefDes command is used,
all RefDes assigned automatically, get changed based on the RefDes pattern.
Syntax
REF_DES_PATTERN pattern
where, pattern is an alphanumeric character string
Example
REF_DES_PATTERN '($PHYS_DES_PREFIX)($PAGE)[0-9](00)'
Here:
