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Identifying Clocktree Cells

nv03

Hello,

I want to pre-process my clocktree cells, in a manner as to find them out and if they are HVT swap them to there SVT counterpart. Is there an easy way to identify the clocktree cells.

 

NV03

  • You can identify all the HVT clock cells using: 

    set insts  [dbGet -u [dbGet -p top.nets.isClock 1].allTerms.inst]

     foreach inst $insts {
        set cell [dbGet ${inst}.cell.name]
        if {[regexp {HVT|hvt} $cell]} {
           puts [dbGet ${inst}.name]
        }

    }

    Or you can use:

    filter_collection [all_fanout -from [get_ports <clock_ports>] -only_cells] "ref_name=~*HVT"

    Hope this helps.

    Regards, Prathima. 

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