Tutorials:Cadence:DesignHierarchy

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Design Hierarchy

Library
Libraries let you organize design data and perform version access and control. A library is a collection of logical design objects, organized in levels as shown:
Cell
A cell is the basic design object. It forms an individual building block of a chip or system. It is a logical, rather than physical, design object. Each cell has one or more cell views as shown above. Cells can be logically grouped into cell categories. A cell can belong to several cell categories.
Cell view
A cell view is a virtual data file created in association with a cell and a view. It is a logical, rather than physical, design object.


The Cadence software manages these files transparently. However, because of the relationship between cells, you must use the commands copy, move, and delete within the Cadence software in order to manipulate the different cells. UNIX operating system commands cannot correctly handle these files.


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