Patent ID: 6842814

Claim:
A connection managing method of a digital interface for performing a connection management for a plurality of devices connected by a digital interface, the plurality devices including operation modes having a normal mode for performing a usual operation prescribed in a digital interface standard and a private mode for performing an operation which selectively controls an external device, the method comprising the steps of: (a) establishing the private mode as an operation mode in a first arbitrary device for a digital connection between the first arbitrary device and a second arbitrary device; (b) the first device identifying devices having a right to access related registers to store in itself information relating to the identified devices, wherein the identified devices having a right to access the related registers are allowed access to the digital connection between the first arbitrary device and the second arbitrary device; (c) the first device determining whether there is a request for access to the related registers by a third-party device; (d) determining whether the third-party device is included in the previously stored devices if there is a request; (e) the first device accepting the request of the third-party device if the third-party device is determined to be included in the devices stored in the step (d); and (f) the first device returning an error code to the third-party device, which indicates that the first device cannot accept the request, if the third-party device is not determined to be included in the devices stored in the step (d).