| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a USB controller capable of correctly recognizing a USB device having a remote wake-up function.SOLUTION: A USB controller of one embodiment includes: a port setting unit 12 that sets a state of a port 13 to which a USB device 30 is connected; and a device detection unit 11 that detects the type of the connected USB device 30. When the port 13 is in a suspended state, the device detection unit 11 detects whether or not the USB device 30 has a remote wake-up function. If the USB device 30 has the remote wake-up function, the port setting unit 12 sets the port 13 to a state capable of receiving a remote wake-up signal which is output from the USB device 30.</p> |
