5.17.3.1 Attribute Column

The attribute column specifies additional properties of a port on the instance. These are:

PAD - Indicates that the port is a chip-level package pin. In SmartDesign, these ports are automatically promoted to the top-level and are read only.

BIF - Indicates that the port is a Bus Interface.

GND - Tie the port to logic 0.

VCC - Tie the port to logic 1.

Invert - Invert the polarity of this port. Inverting a port automatically instantiates an inverter into the generated HDL file:

• For a driver: Inverter added after pin or port.
• For a non-driver: Inverter added before pin or port.

Unused - Indicates the pin has been assigned the float attribute and is not included in the Design Rules Check.

<design name> Column

The <design name> column represents the top-level; the name of the column depends on the name of your design.

Instances Column(s)

An instance column represents an instance that an instance-port of a row can be connected to.