基于FPGA的参数可调RS422接口电路设计实现

Design and Realization of RS422 Interface Circuit with Adjustable Parameters Based on FPGA

介绍了一种基于FPGA的波特率可变、数据位和停止位长度可调、奇偶校验功能可选的RS422串行信号接口电路设计。该设计以Altera的Cyclone系列芯片EP3C80F780I7作为控制芯片,以ADI的ADM2687EBRIZ作为RS422差分信号处理芯片。此外,该设计所有运算功能均采用硬件逻辑实现,具有可靠性高、通用性强的特点。

This paper introduces a design of RS422 signal processing interface circuit based on FPGA with adjustable baud rate,length of data and stop bit,and optional parity function. The design uses Altera Cyclone chips EP3C80F780I7 for control,and the differential signal processing chip ADM2687 EBRIZ ADIfor the RS422 processing. All operational functions of the design are accomplished by hardware logic. The design has characteristics of high reliability and versatility.