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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

  • Hi Lei,

    For an instance, you can use inst~>xy (to get origin) and inst~>orient (to get the orientation) or inst~>transform to get both together (along with a magnification - don't use this, since it's obsolete in OA). This is clearly covered in the documentation on database objects, and can be found by looking at inst~>??

    Mosaics are a little complex, but you find mosaics by looking at cvId~>mosaics (which has a bBox). An example of dealing with mosaics can be found in Solution 11328674

    Regards,

    Andrew.

Reply

  • Hi Lei,

    For an instance, you can use inst~>xy (to get origin) and inst~>orient (to get the orientation) or inst~>transform to get both together (along with a magnification - don't use this, since it's obsolete in OA). This is clearly covered in the documentation on database objects, and can be found by looking at inst~>??

    Mosaics are a little complex, but you find mosaics by looking at cvId~>mosaics (which has a bBox). An example of dealing with mosaics can be found in Solution 11328674

    Regards,

    Andrew.

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