21.16.2.1 Arguments

-clock clock_name

Creates a collection of register cells or register pins in the specified clock domain.

-cells

Creates a collection of register cells. This is the default. This option cannot be used in combination with any other option.

-data_pins

Creates a collection of register data pins.

-clock_pins

Creates a collection of register clock pins.

-async_pins

Creates a collection of register asynchronous pins.

-output_pins

Creates a collection of register output pins.