Adding a Subcircuit
Follow this procedure to add a new Twin Builder subcircuit to a design:
- Open the design to which you want to add a subcircuit.
- On the Twin Builder menu, click Add SubCircuit.
This displays a menu of the kinds of subcircuits that you can choose to add.
- Select Add SubCircuit from the menu list.
Twin Builder adds a subcircuit to the project as a blank schematic sheet and adds a default symbol linked to the new circuit to the parent schematic. The symbol’s default name and other properties can be viewed and edited like any other component.
A design symbol for the new subcircuit also appears in the Project tree subordinate to the parent design.
Add interface ports to the subcircuit sheet to provide external connections to the subsheet. The ports are either conservative or quantity of any supported type. You can add these interface ports as pins to the subcircuit symbol on the parent schematic. The pin spacing is controlled by the SubCircuit Pin Spacing setting on the Schematic Editor Options: General tab.
Unconnected interface ports adjust to the domain they are being connected to, in the subcircuit. However if the corresponding top-level pins in the parent circuit are wired, then automatic adjustment does not occur, in which case domain conversion is applied instead.