摘  要：研讨基于FPGA开发平台实现的四串口扩展模块设计方法。在通信过程中串口的波特率可以很方便的进行设置。该设计方法点在于其具有经济性、易实现性和良好的可移植性，有着很强的通用性和推广价值。

关键词：接口技术   串口扩展   FPGA   Verilog HDL

Abstract: With the rapid development of electronic technology,muchattention is paid to serial

communication interface which is a primary communication interface.This paper introduce A

method of four serials extension which is based on FPGA.Intheprocess of communication,users

can set baud rate easily.Th