提出了一种基于单片机的智能仪表扩展USB接口的方法。介绍了USB接口芯片SL811 HS的结构和性能以及USB接口的硬

件电路图，详细分析了USB接口驱动程序的设计方法及FAT16文件系统的结构。利用SCSI传输命令集，通过BULK-IN和BULK-OUT

端点实现了主机与U盘设备之间的数据通信。实验和应用结果表明，该方案具有控制方便、传输速度快、存储数据稳定可靠等优点。-A microcontroller based intelligent instrumentation extended USB interface. Introduced a USB interface chip SL811 HS structure and performance, and USB interface, hardware schematics, detailed analysis of the USB interface driver of the design method and FAT16 file system structure. Transmission using SCSI command set, by BULK-IN and BULK-OUT endpoint achieved between the host and U disk devices for data communications. Experiment and application results show that the scheme is easy to control, transmission speed, stable and reliable data storage.