基于CPLD的USB总线的隔离接口实现

The realization of the USB bus isolation interface based on CPLD

本文详细介绍了USB总线的光隔离接口的隔离原理、硬件组成及控制程序的设计。该实现方案采用先进的高速光隔离技术和CPLD控制技术,对基于USB的测试与测量的设备、人体起保护作用并保持数据信号的完整性。

For protecting the devices and bodies of testing and measuring based on USB,and retaining the integrity of data signal, advanced high speed isolation and CPLD logical control technology is used in the project. In this paper, the isolation principle of the USB bus light-based isolation interface is described in detailed, and giving the design method of hardware and software.