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 Spacing table is not found in generated lef 

Last post Wed, Feb 27 2013 8:23 AM by Alex Soyer. 1 replies.
Started by Arslan 09 Jan 2013 01:33 AM. Topic has 1 replies.
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  • Wed, Jan 9 2013 1:33 AM

    • Arslan
    • Top 200 Contributor
    • Joined on Mon, Dec 10 2012
    • Posts 33
    • Points 480
    Spacing table is not found in generated lef Reply

    HI, while creating .lef from virtuoso .tf I recieve following warning

     could not find 2 matching layer constraints for VIA1

    virtuoso generates .lef but this .lef has missing spacing tables for VIA1 cutclass rect and square.

    how to resolve the issue?

    • Post Points: 20

  • Wed, Feb 27 2013 8:23 AM

    • Alex Soyer
    • Top 75 Contributor
    • Joined on Tue, Jan 12 2010
    • Sophia-Antipolis, Alpes-Maritimes
    • Posts 70
    • Points 1,330
    Re: Spacing table is not found in generated lef Reply

    Hi,

    You need to dump out the technology file from Virtuoso by using the Technology ToolBox accessible form the CIW Tools menu.

    Click on Dump and choose teh technology library and specify the ascii file name then click ok.

    The file should automcatically opened into a text editor.

    Please search for minCutClassSpacing with VIA1 part of it

    The rule should be defined as follow:

    spacingTables( ( minCutClassSpacing tx_cutLayer1 tx_cutLayer2 ( ( "cutClass" (g_index...) nil "cutClass" (g_index...) nil) ['sameNet|'sameMetal] ['paraOverlap [g_overlap]] ['cutClassProfile (( "cutClass" (g_index...) nil "cutClass" nil|(g_index...) nil) (g_profileTable)] [g_default]) (g_table) ['manhattan] ) ) ;spacingTablesThanks,
    Alex
    • Post Points: 5
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Started by Arslan at 09 Jan 2013 01:33 AM. Topic has 1 replies.