Usb interface
Universal serial bus (USB) is a new data communication method that gradually replaces other interface standards. It was jointly formulated by Intel, Compaq, Digital, IBM, Microsoft, NEC, Nortel and other computer companies and communication companies in 1995, and gradually formed the industry standard. As a kind of high-speed serial bus, USB bus can meet the requirements of high-speed data transmission application environment, and it also has the advantages of simple power supply (bus power supply), convenient installation and configuration (plug and play, hot plug support), simple expansion port (at most, 127 peripherals can be extended through hub), diversified transmission modes (four transmission modes), good compatibility (backward compatibility after product upgrade) and so on. ?
Universal serial bus (USB) has successfully replaced serial port and parallel port since it came out, and has become one of the standard extended interfaces and necessary interfaces for a large number of computers and intelligent devices in the 2nd/kloc-0 century. Now it has developed to USB 4 version. USB has the advantages of fast transmission speed, convenient use, hot plug support, flexible connection and independent power supply. It can connect a variety of peripherals, such as keyboard, mouse, and mass storage devices. This interface is also widely used in smart phones. The interaction between computers and other intelligent devices and external data is mainly based on network and USB interface.