Android USB

Universal serial bus (USB) is a new data communication mode which gradually replaces other interface standards. It was jointly developed by Intel, Compaq, digital, IBM, Microsoft, NEC, Northern Telecom and other computer companies and communication companies in 1995, and gradually formed industry standards. As a kind of high-speed serial bus, USB bus's extremely high transmission speed can meet the application environment requirements of high-speed data transmission, and the bus also has the advantages of simple power supply (bus power supply), convenient installation and configuration (plug and play and hot plug are supported), simple expansion port (127 peripherals can be expanded at most through the hub), diversified transmission mode (4 Three kinds of transmission modes), as well as the advantages of good compatibility (downward compatibility after product upgrade)