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Abstract physical information file (.LEF) of standard cell

fengye

Recently, I mainly research the achievement of digital standard cell library. For the given library cell layout, I'm planning to extrate the LEF file for floorplan and placement. But I don't know how to abstract the physical informaltion file. I learn there are two ways.

(1) At the CIW of Virtuoso, "File > Export > LEF", is this true way to get LEF for floorplan and placement?

(2) Use softeware " Abstrate Editor", but this operation is complex, could anyone help me?

I don't know which way is true? If the second way is true , I hope I can get some guide about how to operate.

  • Andrew Beckett
    in reply to fengye

    The LEF export won't cause an abstract to be generated. It's fine for exporting an abstract representation to LEF (Layout Exchange Format) and potentially for a simple layout to LEF - but you generally want to abstract away the complexity to help the P&R tool work efficiently.

    So you really need to understand the abstract generator. There is a Rapid Adoption Kit available: Abstract Generator

    Regards,

    Andrew.

  • fengye
    in reply to Andrew Beckett

    Hi, thank you very much. I remember I get some useful suggestions about the Liberate from you too. It's so kind of you. This time, I want to extrate the LEF of layout for P&R. I have gotten the another softwar "Abstract Generator", it doesn't combine with Virtuoso. The setting for abstract is complex, I don't get some reference userguide. 

  • fengye
    in reply to Andrew Beckett

    In the process of abstract for PIN view, some problems occurs. As shown in  the picture, I don't know how to fill the content. This just a INV example.

  • Andrew Beckett
    in reply to fengye

    Did you work through the Rapid Adoption Kit that I mentioned above? That's the best way to familiarise yourself with this tool.

    Andrew.

  • fengye
    in reply to Andrew Beckett

    Yes, I read the Rapid Adoption Kit in the afternoon,and operate as is showed in the lab.  For PIN extration step, it shows "Since we have used the logical step previously, there is nothing we need to add to this form." This means it doesn't fill the content in "Map","Text","Boundry". But I operate with the same operation, I can't get the corrent results.

  • Andrew Beckett
    in reply to fengye

    Please can you contact customer support for this? I don't have the bandwidth this week or next to work through this and check it through (sorry, the day job is getting in the way!)

    Andrew.

  • fengye
    in reply to Andrew Beckett

    OK, thanks a lot. 

    bestwish!

  • fengye
    in reply to Andrew Beckett

    Thank you again! 

    Best wishes!

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