| 摘要 |
A pull-up resistor (13) of an electronic device (10) pulls up a potential of a USB signal line that is for connection with a host, thereby allowing the host to detect a communication speed. In response to a status request from the host in a normal power mode, a transmission-reception section (11) transmits a status response indicating a switchable status when the electronic device (10) is switchable to a power saving mode. A control section (14) performs switching to the power saving mode after the host suspends transmission of the status request upon receipt of the status response, and performs switching to the normal power mode in response to a specific event within the electronic device (10) in the power saving mode. A switch (12) disables the pull-up to inform the host about disconnection, and enables the pull-up to inform the host that the connection is re-established, thereby causing transmission of the status request to be resumed. |
