The second part of this paper mainly analyzes the actual biggest bandwidth provided by USB Spec 1.1. The last part of this paper describes the implement of engineering in hardware,firmware and host program.

• 第二部分分析了USB1.；1规范所能提供的实际最大带宽。 第三部分从硬件、固件和主机程序三个部分给出了具体的工程实现。