USB interface is a serial bus interface type. Its key benefits include in particular:
All devices connected to the USB interface share among themselves the entire bandwidth. USB bus is then controlled by one central facility (Host Root HUB), which coordinates transmission and reception of data, respectively cooperation of other USB devices. The path between the control (central) USB device, and any other USB device can contain in maximum five hubs. The maximum cable length between two USB devices is limited to 5 meters.
Connected USB devices are on the bus clearly identified by the USB address that is assigned immediately after connecting the USB device to the interface. It is possible to connect on the USB interface up to 127 devices.
The speed modes of data transfer
The individual types of USB devices