| 摘要 |
A digital camera capable of communicating with an external device through a predetermined communication bus and having a plurality of communication modes of diverse kinds includes a system control section and a USB control section which serve respectively as a judging device for transmitting a notification code for notifying a presently set-up communication mode, and then judging whether a command in response to the notification code is received from the master device within a predetermined time or not; and a communication controlling device for performing control on the basis of a judgment result of the judging device in such a manner that when a command in response to the notification code is received from a master device within the predetermined time, a state permitting communication with the master device is established in correspondence to the command, and when the command is not received within the predetermined time, connection to the master device is electrically released temporarily and then the connection is restored.
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