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How to compute the bounding box of a cell in a hierarchical design

Renee

Hi,

 I had some problems with the placing pad head in a chip design. In the orignal design, all IOs have been placed without pad head. As there are so many pads in the design, I tried to realize this function by writing a program.

 Here are the functions it should have:

1. It should be able to identity positions of each IO.

2. It should be able to place pad head to the relative positon.

Here are my general thoughts to realize these function:

1. As there are identify layers covering IO, thus in order to locate them, I could locate bounding box of those ID layers, then I can have the lowerleft and upperight vertexes of IO. (But I have problems with getting bounding box of a cell in a hierarchical design)

2. How to place cell at a specific position in a design automatically?

 Thanks in advance!

Lei  

Parents
  • Renee

    Thanks for your advice.

     I still have some problems with this pad head problem:

    If the IO instances are placed at lower level of the design and I could only add pad heads at the top level. How can I go through all the instances from top to bottom view and find these IO cell instance?

     Thanks!

Reply
  • Renee

    Thanks for your advice.

     I still have some problems with this pad head problem:

    If the IO instances are placed at lower level of the design and I could only add pad heads at the top level. How can I go through all the instances from top to bottom view and find these IO cell instance?

     Thanks!

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