Bidirectional Ports

bidirin

Yes

Bidirectional port.

Must connect to the padio port of the altddio_bidir megafunction. The padio port must not have any other fanouts.

io

Yes

Bidirectional port. Represents the positive pin of a differential I/O standard.

Must connect to the bidirectional device pin or an entity bidirectional port. There must be no logic between the io port and the device's bidirectional port.

iobar

Yes

Bidirectional port. Represents the negative pin of a differential I/O standard.

Must connect to the device's bidirectional pin or an entity bidirectional port. There must be no logic between the iobar port and the device's bidirectional port.