USB device set

A USB device set comprising:

• a first USB device operable as a host device and a peripheral device, the first USB device storing a device driver of the first USB device and device drivers of other USB devices, and
• a second USB device operable as a host device and a peripheral device, the second USB device storing a device driver of the second USB device and the device drivers of the other USB devices,
• wherein a device driver controller of one of the first and second USB devices operating as a peripheral device receives first device driver information of another of the first and second USB devices operating as a host device and of the other USB devices when the first and second USB devices are initially interconnected, and updates the device drivers of the another of the first and second USB devices operating as the host device and the other USB devices stored therein responsive to the received first device driver information, and
• wherein a device driver controller of the another one of the first and second USB devices operating as the host device receives second device driver information of the one of the first and second USB devices operating as the peripheral device and of the other USB devices when the first and second USB devices are initially interconnected, and updates the device drivers of the one of the first and second USB devices operating as the peripheral device and the other USB devices stored therein responsive to the received second device driver information, to provide two-way transmission of device driver information.

A USB device operable as both a host device and a peripheral device, comprising:

• a first memory region storing device drivers of another USB device and other USB devices,
• a second memory region storing a device driver of the USB device, and
• a device driver control circuit, which updates a device driver stored at least in the first memory region,
• wherein upon being initially coupled to the another USB device, the device driver control circuit receives first information of a device driver of the another USB device and device drivers of the other USB devices, updates the first memory region in accordance with the received first information, and sends second information on the device driver of the USB device to the another USB device, to provide two-way transmission of device driver information prior to further communication, regardless of whether the USB device operates as the host device or the peripheral device.