通用串行总线(USB Universal Serial Bus)是一种计算机与外部设备连接的新技术，相对于PC传统的串/并行接口，USB具有较高的数据传输率、即插即用、热插拔、易扩充和低成本等优点。从USB标准颁布以来的短时间内，USB已成为PC必备的标准接口。-Universal Serial Bus (USB Universal Serial Bus) is a computer and external device connectivity, the new technology, compared to traditional PC series / parallel interface, USB with high data transmission rate, Plug-and-Play, hot swap, easy expansion and low-cost advantages. USB standard from the short time since the promulgation, USB PC has become an essential standard interfaces.