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Overlapping Pin layers not triggering abutment.

snee

I have created a PCell of a traditional transistor. Both the Source and Drain is their own ROD object. I have setup the abutment properties according to documentation, however when overlapping one cells source with the others drain the auto abutment function (MosAbutFunc) is never called and the shapes never snap.

The following is how I attach abutment options to the respective Diff layers.

leftObj = leftDrain->dbId
net_id = dbMakeNet( pcCellView "S" )
term_id = dbCreateTerm( net_id "S" "inputOutput" )
pin_id = dbCreatePin( net_id leftObj "leftDiff")
dbReplaceProp(leftObj "abutFunction" "string" "MosAbutFunc")
dbReplaceProp(leftObj "abutAccessDir" "list" list("left"))
dbReplaceProp(leftObj "abutClass" "string" "diffs")
dbReplaceProp(leftObj "vxlInstSpacingDir" "list" list("left") )
dbReplaceProp(leftObj "vxlInstSpacingRule" "float" 2.0)

rightObj = rightDrain->dbId
net_id = dbMakeNet( pcCellView "D" )
term_id = dbCreateTerm( net_id "D" "inputOutput" )
pin_id = dbCreatePin( net_id rightObj "rightDiff")
dbReplaceProp(rightObj "abutFunction" "string" "MosAbutFunc")
dbReplaceProp(rightObj "abutAccessDir" "list" list("right"))
dbReplaceProp(rightObj "abutClass" "string" "diffs")
dbReplaceProp(rightObj "vxlInstSpacingDir" "list" list("right") )
dbReplaceProp(rightObj "vxlInstSpacingRule" "float" 2.0)

Parents
  • Hi Shane,

    Are you operating in Virtuoso Layout Suite XL? And do you have the Options -> Editor "Abut Server" turned on, and the XL Options, Generation, "Abut transistors" option turned on? You must be in XL for abutment to work, though unabutment can work in 'L'. Which version are you using? The latest versions have a PCell development mode in Virtuoso that might be helpful in debugging.

    I hope this helps.

    Regards,

    Lawrence.
Reply
  • Hi Shane,

    Are you operating in Virtuoso Layout Suite XL? And do you have the Options -> Editor "Abut Server" turned on, and the XL Options, Generation, "Abut transistors" option turned on? You must be in XL for abutment to work, though unabutment can work in 'L'. Which version are you using? The latest versions have a PCell development mode in Virtuoso that might be helpful in debugging.

    I hope this helps.

    Regards,

    Lawrence.
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