LAM File Physical Section

<PHYSICAL>
  <COMPONENT_TYPE_GROUPS>
    <!-- component type definitions -->
  </COMPONENT_TYPE_GROUPS>
  <>   
    <!-- logical to physical  -->
  </>
</PHYSICAL>

Description

The physical section of the LAM file is divided into two subsections. One of these defines the library-level component types, the other specifies the logical-to-physical mapping for the design.

Statements

Statement	Description
<COMPONENT_TYPE_GROUPS>
	Encloses the library-level component type definitions.
<>
	Encloses all the statements used to map physical cellviews, parameters, and terminals to their counterparts in the logical design.

The logical-to-physical mapping of the design is dependent on:

• The order in which the libraries are defined in cds.lib because that determines the order in which the corresponding LAM files will be read for appropriate physical binding.
• The availability of the exact matching physical binding in the logical library.
  • If the logical library has a matching physical binding, the physical binding in the logical library gets used to create a logical-to-physical map.
  • If a matching physical binding is not available in the logical library, the libraries defined in cds.lib are read in the reverse order until a matching physical binding is found. If the library definition order in cds.lib is modified, the order in which the libraries are read will change as well.

Related Topics

Library and Attributes Mapping File Syntax

LAM File Component Type Section

LAM File Mapping Section

Basic LAM File Structure

LAM File Logical Section

Sample LAM File

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