Determination of Physical Connectivity Status of Devices Based on Electrical Measurement

A method for controlling a connectivity status of a source device with a sink, device, the method comprising:

• discovering by the source device, a change in impedance on a control bus interface;
• responsive to detecting the change in impedance, initiating by the source device, a discovery process via the control bus interface;
• activating a connected state of the source device responsive to the discovery process detecting a connection to a sink device;
• while in the connected state, sensing by the source device whether or not a termination element of the sink device is coupled to a data bus interface;
• if the sensing by the source device fails to detect the element of the sink device, determining by the source device that the connection with the sink device has been lost;
• and
• responsive to the determining by the source device that the connection with the sink device has been lost, decoupling a termination of the source device from the control bus interface.