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Pcell inherit child pCell parameter

yankunRen

hi,

In IC616, use Skill to create PcellA and PcellB,

How to call child  PcellB in PcellA, and PcellA inherits the parameters in PcellB?

Which functions or methods need to be used? Wish there was an example

Thanks！

  • Hi,

    I take it that you want to create a hierarchical Pcell were PCellB should be an subinstance of PcellA right?
    Well you can easily do this by calling dbCreateParamInst(...) in the pcDefinePcell code that defines PcellA:

    pcDefinePCell(
       list(ddGetObj(<libName>) "PcellA" "layout")
       (
          (layerName string "Metal1")
          (width float 1.0)
          (length float 2.0))
       ....
       ....
       ...
       (dbCreateParamInst
          pcCellView
          (dbOpenCellViewByType <libName> "PcellB" "layout")
          "I0"
          (list 0 0)
          "R0"
          1
          (list (list "width" "float" width)
                (list "length" "float" length)
          )))

    So as you can see the PcellA parameters width and length are being passed on to the PcellB instance as the seventh argument of dbCreateParamInst(..). The cellview of PcellA in which you  place the PcellB instance is automatically available in the variable pcCellView - but I guess you know that anyway.

    regards
    Max

  • in reply to mbracht

    I should also point out that this is really easy to do using Cadence PCell Designer!

    Andrew

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