Design compiler is_ hierarchical

  • What is the difference between hierarchical and flat design in VLSI?

    Generally speaking, it is recommended to use a hierarchical design approach for large, complex, modular ASICs that require scalability, reusability, and reliability.
    On the other hand, a flat design approach is best for small, simple, unique ASICs that need flexibility, optimization, and speed..

A wealth of new hierarchical compile strategies have become available in the last few years. This paper will compare area, speed, and compile time for 

How does design compiler look for objects of different types?

If several objects of different types have the same name and you do not specify the object type, Design Compiler looks for the object by using the types allowed by the command.
To specify an object type, use the get_*command.
For more information about these commands, see Using Tcl With Synopsys Tools.

What does design compiler C do in a hierarchical design?

Note:

  • In a hierarchical design
  • Design Compiler c onsiders only the top-level design’s local link library.
    It ignores local link libraries associated with the subdesigns.
    Design Compiler uses the first reference it locate s.

    • What is a design compiler synthesis step?

    Optimization Basics Optimization is the Design Compiler synthesis step that maps the design to an optimal combination of specific target logic library cells, based on the design’s functional, speed, and power requirements.
    You use the compileor the compile_ultracommand to start the synthesis and optimization processes.

    What is hierarchy manipulation in design compiler?

    Design Compiler provides the following hierarchy manipulation capabilities:

  • • Adding Levels of Hierarchy • Removing Levels of Hierarchy • Preserving Hierarchical Pin Timing Constraints During Ungrouping • Merging Cells From Different Subdesigns .

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