An interface assembly of a host system that connects a peripheral device to a USB Type-C interface has at least one supply line and at least one signaling line, wherein one from among a plurality of different power profiles can be selected by the peripheral device by applying different analog control signals to the signaling line, a signaling circuit connects to the signaling line on a side of the host system, the signaling circuit, on the basis of at least one digital control signal, produces a predetermined analog control signal assigned to the at least one digital control signal and outputs it to the peripheral device via the signaling line and the at least one digital control signal is provided via a GPIO port of a control module of a system component of the host system, and the GPIO port is controlled by a BIOS.