本文采用 USB 接口芯片+FPGA+自行设计的 429 总线驱动电路的方案，

完成了 USB-429 总线接口的设计。其中，USB 接口芯片采用 Cypress 公司的

从设备芯片 CY7C68013，实现了与计算机 USB 总线接口的数据通信。FPGA

代替 429 专用协议收发芯片，完成 429 总线数据的格式转换和协议处理，设

计更为灵活，成本更加低廉-The scheme of USB interface chip+ FPGA+ self-designed 429 bus driver circuit

has been adopted to achieve the design of USB-429 bus interface. In this scheme,

Cypress corporation’s USB slave controller chip CY7C68013 has been used to

communicate with a host computer through USB interface. Instead of dedicated bus

interface chip, FPGA has been used to complete data format conversion and protocol

processing with less cost and more flexibility.