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 Exporting LEF format file from layout library 

Last post Fri, Feb 5 2010 4:28 PM by shushan. 8 replies.
Started by shushan 04 Feb 2010 12:37 PM. Topic has 8 replies and 2769 views
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  • Thu, Feb 4 2010 12:37 PM

    • shushan
    • Top 500 Contributor
    • Joined on Mon, Oct 26 2009
    • Yerevan, Armenia
    • Posts 27
    • Points 405
    Exporting LEF format file from layout library Reply

    Hi All,

     

    Can you please tell me if it is possible to export LEF file from the cells in current layout library in IC6.1.3? And if yes, how to do that or what other alternatives to use?Because it seems, that simple clicking on appropriate buttons don't give the desired/any result.

     

    Thanks in Advance,

    Shushanik

    • Post Points: 20
  • Thu, Feb 4 2010 12:55 PM

    Re: Exporting LEF format file from layout library Reply

    Hi Shushanik,

    This ought to work. In order to find out what is going wrong, it would be useful to know:

    1. What subversion of IC613 are you using (Help->About in the CIW will tell you this)
    2. What "simple clicking" did you do - perhaps a picture of the filled in File->Export->LEF form would help
    3. Were there any errors in the CIW (or CDS.log) when you OK'd the form?

    I just tried it and it worked for me.

    Andrew.

    • Post Points: 35
  • Thu, Feb 4 2010 4:25 PM

    • shushan
    • Top 500 Contributor
    • Joined on Mon, Oct 26 2009
    • Yerevan, Armenia
    • Posts 27
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    Re: Exporting LEF format file from layout library Reply

    Hi Andrew,

    1.  I am using IC6.1.3.500.10
    2. This is what i do:

         File-Export-LEF

    _____________________________________

    LEF File Name:abc.lef

    Library name:tsmc45

    "cells" buttom is highlited

    Output Cell:MUX2_8

    Output Views:layout

    Log File Name:abc.log

    LEF version: 5.6

    "Use GUI Fields" buttom is highlited 

    __________________________________________ 

    No Errors occur. At first, everything seems fine. But the problem is that the generated abc.lef file does not contain information about specified MACRO. It seems that it gives information about technology file. So, imported abstract view is empty.

    Here is the only information in abc.lef about given MUX2_8 cell

    MACRO MUX2_8
      PROPERTY oaTaper "__DerivedDefaultTaperCG" ;
      PROPERTY lastSavedExtractCounter 303 ;
    END MUX2_8

    Thanks,

    Shushanik 

     

    • Post Points: 5
  • Thu, Feb 4 2010 4:25 PM

    • shushan
    • Top 500 Contributor
    • Joined on Mon, Oct 26 2009
    • Yerevan, Armenia
    • Posts 27
    • Points 405
    Re: Exporting LEF format file from layout library Reply

     Hi Andrew,

    1.  I am using IC6.1.3.500.10
    2. This is what i do:

         File-Export-LEF

    _____________________________________

    LEF File Name:abc.lef

    Library name:tsmc45

    "cells" buttom is highlited

    Output Cell:MUX2_8

    Output Views:layout

    Log File Name:abc.log

    LEF version: 5.6

    "Use GUI Fields" buttom is highlited 

    __________________________________________ 

    No Errors occur. At first, everything seems fine. But the problem is that the generated abc.lef file does not contain information about specified MACRO. It seems that it gives information about technology file. So, imported abstract view is empty.

    Here is the only information in abc.lef about given MUX2_8 cell

    MACRO MUX2_8
      PROPERTY oaTaper "__DerivedDefaultTaperCG" ;
      PROPERTY lastSavedExtractCounter 303 ;
    END MUX2_8

    Thanks,

    Shushanik


     

     

    • Post Points: 5
  • Fri, Feb 5 2010 3:35 PM

    • shushan
    • Top 500 Contributor
    • Joined on Mon, Oct 26 2009
    • Yerevan, Armenia
    • Posts 27
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    Re: Exporting LEF format file from layout library Reply

     Pleaseeeee help me.This is realy very hot!!!!

    Do i need the abstact views of cells before exporting them as .LEF format cells.Do i need some changes to made in technology file?

    How to get comlete LEF file?

     

    Thanks in Advance,

    Shushanik 

    • Post Points: 20
  • Fri, Feb 5 2010 3:45 PM

    Re: Exporting LEF format file from layout library Reply

    If it is really hot, asking in a Community Forum is not the right place to do it. Go to Cadence Customer Support (http://support.cadence.com). The Community Forum is not a substitute for customer support - it is purely down to voluntary responses by the community (including a few of us from Cadence who do this in our spare time - for example, it is not part of my job to respond on these forums).

    My guess is that the cellViews you are trying to export are just arbitrary layout. Normally you need to have pin information on the layout, and boundaries and blockages and so on - usually things that will either have been created by hand using a tool such as Virtuoso Layout Suite XL, or by using the abstract generator.

    Regards,

    Andrew.

    • Post Points: 20
  • Fri, Feb 5 2010 4:07 PM

    • shushan
    • Top 500 Contributor
    • Joined on Mon, Oct 26 2009
    • Yerevan, Armenia
    • Posts 27
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    Re: Exporting LEF format file from layout library Reply

    Hello Andrew, 

    Thank you. I do appreciate that.

    My layout design is complete and has pins,boundary....etc.

    The only solution i can see at this point is to change technology file.Can it help?

    Regards,

    Shushanik 

    • Post Points: 20
  • Fri, Feb 5 2010 4:20 PM

    Re: Exporting LEF format file from layout library Reply

    Hi Shushanik,

    I can't see why that should be necessary (changing teh technology file).

    Best is to provide the data to Cadence Customer Support so they can take a look and find out why.

    Regards,

    Andrew.

    • Post Points: 20
  • Fri, Feb 5 2010 4:28 PM

    • shushan
    • Top 500 Contributor
    • Joined on Mon, Oct 26 2009
    • Yerevan, Armenia
    • Posts 27
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    Re: Exporting LEF format file from layout library Reply

     OK,thank you.

    • Post Points: 5
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Started by shushan at 04 Feb 2010 12:37 PM. Topic has 8 replies.