3

---

Design Components in Hierarchy Editor

---

With the Hierarchy Editor, you can control the expansion of your design for any given purpose such as simulation or netlisting. You do this by creating and editing rules that define a design configuration.

You can specify the following configuration rules in the Hierarchy Editor:

• Library Binding: Library binding determines the library from which a cell is obtained.
• View Binding: View binding determines which view of a cell is to be used in the configuration. For example, a cell might have different representations such as schematic, Verilog, and VHDL; the view binding determines which of these representations is used in the configuration.
• Stop Lists and Stop Points: Stop lists and stop points prevent further expansion of any part of a design.
• Bind-to-Open: The bind-to-open attribute is a way of specifying that a single instantiation of a cell is to be skipped by setting a bind-to-open attribute on it.
• Constraint Binding: Constraint binding determines which constraint view is to be used in the configuration.

You create and edit these rules at different levels of the design. You can specify global rules that apply to every level of the design. You can also specify rules at the cell, instance, and occurrence levels.