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 Writing out .lib & lef from virtuoso 

Last post Thu, Oct 10 2013 2:34 AM by Alex Soyer. 5 replies.
Started by Shameel 06 Oct 2013 04:08 AM. Topic has 5 replies and 1018 views
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  • Sun, Oct 6 2013 4:08 AM

    • Shameel
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    • Joined on Wed, Sep 25 2013
    • Thiruchirappalli, Tamil Nadu
    • Posts 9
    • Points 235
    Writing out .lib & lef from virtuoso Reply

     Hi All

    How can I write out .lib file of a digital module designed in virtuoso ?

    Also If I want to import this module as a digital block to encounter, how can I make it as a macro/cell ? How to take care of this while

    writing out lef from virtuoso ?

     

    Thanks

    Shameel

    • Post Points: 20
  • Mon, Oct 7 2013 9:02 AM

    Re: Writing out .lib & lef from virtuoso Reply

    LEF can be written with File->Export->LEF. .lib could be generated with the Liberate family of tools - there's not really a direct way of writing .LIB from Virtuoso because it generally needs characterization. There is the Tools->Characterization and Modelling->Black Box Liberty (MS) menu - not sureif that's really what you want either.

    Regards,

    Andrew.

    • Post Points: 20
  • Mon, Oct 7 2013 10:06 PM

    • Shameel
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    • Joined on Wed, Sep 25 2013
    • Thiruchirappalli, Tamil Nadu
    • Posts 9
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    Re: Writing out .lib & lef from virtuoso Reply

    Hello Andrew,

    Thanks for the help..

    The issue with lef is that  once I export  lef from virtuoso and read this to encounter,its not recognised by encounter as a macro.

    Can we use the lef generated by  File->Export->LEF in virtuoso directly to encounter ? Or anything else need to be done for generating abstract  views so as to deal with the module as a macro in encounter?

     

    Thanks

    Shameel

    • Post Points: 20
  • Tue, Oct 8 2013 12:53 AM

    • Alex Soyer
    • Top 75 Contributor
    • Joined on Tue, Jan 12 2010
    • Sophia-Antipolis, Alpes-Maritimes
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    Re: Writing out .lib & lef from virtuoso Reply

    Hi Shameel,

     If you have already generated your abstract then you could use (Shift+Q) Edit Master Properties and set the 'cellType' to 'block'.

    Otherwise you can do the setting using abstract generator when creating teh abstract by moving the cell to the 'macro' 'bin'.

    Another solution in case you have to do it for multiple cellviews is to use teh CIW -> Tools -> Set cellType.

     Thanks,

    Alex

    • Post Points: 20
  • Tue, Oct 8 2013 9:36 AM

    • Shameel
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    • Thiruchirappalli, Tamil Nadu
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    Re: Writing out .lib & lef from virtuoso Reply

    Hi Alex,

    I have made the option " CIW -> Tools -> Set cellType>   *   " Still encounter does n't recognize it as MACRO

    If I change CLASS to PAD instead of CORE or BLOCK ,encounter is recognizing it as IO pad with pins and exactly how I need it; except that it is IO .

    But its not supporting CORE,BLOCK

    Is there any attribute in lef that does n't support for CORE but IO ? 

    Thanks

    Shameel

     

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    • Post Points: 20
  • Thu, Oct 10 2013 2:34 AM

    • Alex Soyer
    • Top 75 Contributor
    • Joined on Tue, Jan 12 2010
    • Sophia-Antipolis, Alpes-Maritimes
    • Posts 81
    • Points 1,550
    Re: Writing out .lib & lef from virtuoso Reply

    Hi Shameel,

    For CORE you need additional information like the sitePattern (which is the legal row site pattern in which you can place it) and SYMMETRY set to XY (allowed orientation)

    For BLOCK I think the missing information is the SYMMETRY which is mots of the time ANY.

    In order to set the information you need to open the cellview and do Shift+Q and then complete the Edit Cellview Properties form as mentioned above.

     Thanks,
    Alex

    • Post Points: 5
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Started by Shameel at 06 Oct 2013 04:08 AM. Topic has 5 replies.