ELECTRONIC DEVICE, CHARGE CONTROL METHOD FOR ELECTRONIC DEVICE, REMAINING BATTERY AMOUNT DISPLAY METHOD FOR ELECTRONIC DEVICE, SOURCE DEVICE AND SINK DEVICE

摘要

The present invention makes it possible to satisfactorily perform necessary communication with an external device. A content data handling unit is connected to an external device via a first line. A communication unit is connected to the external device via a second line. The content data handling unit is, for example, a content data transmitting unit for transmitting content data to the external device or a content data receiving unit for receiving the content data from the external device. The communication unit transmits an inquiry signal to the external device via the second line in the state in which the first line is unusable. For example, when an interface unit is in a standby state, it becomes possible to inquire of the external device about a necessary matter while maintaining the state. The power consumed by the external device can be saved as much as possible, thereby making it possible to contribute to energy saving of the external device.