Pins provide the electrical interface between the PCell and the surrounding circuit. Each pin is generated after geometry creation to ensure correct alignment.
dbCreatePin(cv "D" "metal1" ...)
dbCreatePin(cv "S" "metal1" ...)
dbCreatePin(cv "G" "poly" ...)
dbCreatePin(cv "B" "metal1" ...)
By separating pin creation from geometry generation, the PCell maintains a clean structural hierarchy.