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Cadence library and cell views

Pyroblast

Hi guys,

I have a question regarding the hierarchy of cells.

Image that you have a library and inside that library you have several cells in which, two or three, lets say, are like top cells and then you have a bunch of other cells that are inside (with their respective symbol) of the top cell, and inside of some of this cells you have other cells (don't forget, all of them inside the same library), that is: Cell1, Cell2, Cell3 are top cells. Then you have Cell 1.1, Cell 1.2, Cell3.1. So inside Cell 1 you have Cell 1.1 and 1.2 and inside of cell3 you have cell3.1 and so on.

By chance, Cadence has any tool to show you in some way (like a tree structure or just a file with some pointers/paths) which cell is the top and then their childs?

Regards.

Parents
  • Andrew Beckett

    Yes. Several:

    • The schematic editor and layout editor both have Hierarchy->Tree commands to show a text report of the hierarchy
    • In the CIW there is Tools->Print Hierarchy Tree which is a "fast" hierarchy tree tool
    • This is the same as the standalone "fastTree" command that can be run from UNIX
    • The navigator assistant in the schematic editor and layout editor (Windows->Assistants->Navigator)
    • The hierarchy editor (open a "config" view for your design) - this is typically used when you want to configure which view is used for which cell or for each instance. There's a tree view in this tool.

    5 methods is hopefully enough...

    Note for each of these you have to start from a top cell and then have it expand the hierarchy. There's nothing that I'm aware of that will search to find cells which are not referenced by anything else (probably of limited usefulness and also would really need to search across all libraries which would be slow, potentially).

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    Yes. Several:

    • The schematic editor and layout editor both have Hierarchy->Tree commands to show a text report of the hierarchy
    • In the CIW there is Tools->Print Hierarchy Tree which is a "fast" hierarchy tree tool
    • This is the same as the standalone "fastTree" command that can be run from UNIX
    • The navigator assistant in the schematic editor and layout editor (Windows->Assistants->Navigator)
    • The hierarchy editor (open a "config" view for your design) - this is typically used when you want to configure which view is used for which cell or for each instance. There's a tree view in this tool.

    5 methods is hopefully enough...

    Note for each of these you have to start from a top cell and then have it expand the hierarchy. There's nothing that I'm aware of that will search to find cells which are not referenced by anything else (probably of limited usefulness and also would really need to search across all libraries which would be slow, potentially).

    Regards,

    Andrew.

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