METHODS AND APPARATUS FOR ADAPTIVE ACCESSORY DETECTION AND MODE NEGOTIATION

摘要

Methods and apparatus for providing device detection and operational mode negotiation entirely over extant high-speed data bus pins or terminals. In one exemplary embodiment, methods and apparatus are disclosed enabling detection, negotiation and serial/video data transfer over USB 2.0 data interface pins in order to consolidate pin count on the interface and associated connector. Existing USB detection mechanisms are also leveraged to the maximum extent so as to eliminate the need for additional detection protocols. This approach allows for smaller connector and parent device form factor, while still maintaining all of the functional capabilities required for that interface. The breadth of USB-capable devices supported by such an interface is also markedly improved over prior art techniques.