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pin location

Yemelya
Hello,

How can I find location of the pin/pins for particular instance? For example I can find the instance itself by dbInstLoc, but I am not sure how to locate pins of this cell.

Thanks!
-Boris

 

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  • BobD

    Although signal pins are made up of multiple geometries they are additionally stored in the db as "dbGet top.insts.instTerms.pt". When we want to get just a rough idea of where the pins are for troubleshooting distances between pins this simple xy is useful.

    However, if you want to access the detailed geometries that make up a pin - whether it's a signal pin or a pg pin - the key is querying the geometries off the cell master and then transforming it to the location the instance resides at with dbTransform.

    Have a look at this solution which can be discovered on support.cadence.com with a search for "pg pin coordinates":
    http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11723882

    The key is to query the geometries off the cell master then use dbTransform to simplify translation of those coordinates to the chip-level.

    Here is a script to do just that :

    set inst [dbGetInstByName i0]

    foreach pgCellTerm [dbGet $inst.pgCellTerms] {

      puts "[dbGet $pgCellTerm.name]"

      foreach pin [dbGet $pgCellTerm.pins] {

        puts "[dbGet $pin.allShapes.layer.name] [dbTransform -localPt [dbGet $pin.allShapes.shapes.rect] -inst $inst]"

      }

    }

    Hope this helps,
    Bob

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  • BobD

    Although signal pins are made up of multiple geometries they are additionally stored in the db as "dbGet top.insts.instTerms.pt". When we want to get just a rough idea of where the pins are for troubleshooting distances between pins this simple xy is useful.

    However, if you want to access the detailed geometries that make up a pin - whether it's a signal pin or a pg pin - the key is querying the geometries off the cell master and then transforming it to the location the instance resides at with dbTransform.

    Have a look at this solution which can be discovered on support.cadence.com with a search for "pg pin coordinates":
    http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11723882

    The key is to query the geometries off the cell master then use dbTransform to simplify translation of those coordinates to the chip-level.

    Here is a script to do just that :

    set inst [dbGetInstByName i0]

    foreach pgCellTerm [dbGet $inst.pgCellTerms] {

      puts "[dbGet $pgCellTerm.name]"

      foreach pin [dbGet $pgCellTerm.pins] {

        puts "[dbGet $pin.allShapes.layer.name] [dbTransform -localPt [dbGet $pin.allShapes.shapes.rect] -inst $inst]"

      }

    }

    Hope this helps,
    Bob

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