LAM Files and Configuration Views

Underlying the Configure Physical Hierarchy functionality is a Layout XL Schema. It comprises two new data formats.

• For schematic and layout library data, there is a library and attributes mapping (LAM) file to store the symbol properties that drive layout generation, component type information for a given library, and library and cell-level mapping information. This file is called cph.lam and is stored in the following location:
  

  library/.cadence/dfII/cph/lam/cph.lam

  There is no graphical user interface to help you create or edit a LAM file.
• For layout design data, there is a physical configuration (physConfig) view; which comprises a number of files that store design-specific overrides, including the schematic expansion rules that drive layout generation; design component types; and cell and instance mapping rules. Every Layout XL session operates in the context of a physical configuration view, whether generated automatically or user-specified.
  When you launch Layout XL from a schematic window, the schematic view is re-opened in the context of the physical configuration view being used for the session, which might be different from the configuration the schematic was using previously. The schematic window banner updates to indicate the name of the physical configuration view currently being used.
  One effect of this is that you might need to re-extract the schematic view in order to take into account the settings in the physical configuration view. The system will inform you if this extraction is required.
  If you close the Layout XL session by closing the layout window only, the schematic view is re-opened with no physical configuration context.

Related Topics

Library and Attributes Mapping File Syntax