文章介绍了一种采基于FPGA 实现UART电路的方法,并对系统结构进行了模块化分解 以适应自顶向下的设计方法。采用有限状态机对接收器模块和发送器模块进行了设计,所有功能的实现全部采用VHDL进行描述,并在Modelsim环境下进行了仿真,结果表明了该设计的正确性和可靠性。 关键词:UART;FPGA;RS-232;有限状态机 Abstract: This paper introduces a method to design UART circuit based on FPGA. and the system structure is divided into modularization to fit the design method of Top-Down.The receiver and transfer are designed by FSM (Finite State Machine).All functions are described by VHDL.We stimulate the functions under Modelsim environment,the result proves the validity and reliability of the design. Keywords:UART;FPGA;RS-232;FSM