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What is the difference between instance master and header?

alaylayla

What is the difference between instance master and header? Which one to use when traversing the library hierarchy or topcell

  • Hi,

    If you are traversing the hierarchy you will most likely use the masters

    Here is a little recap :

    - master : it is the reference cellview you instantiate in your current design

    - instance : it contains all the properties to be used with your master (at least origin, orientation and pCells parameters when the master is a pCell)

    - header : it is a reference for a group of instances having the same parameters (but not the same origin, orientation)

    Hope this helps,

    Cheers

    Aurélien

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