Abstract: In the Two-Way Cable Network SoC, AMBA bus is used as the chip bus. In order to communicate with serial peripherals, it is needed to design a UART using ABMA bus. This paper introduces the function, structure and implementation of UART. The UART is designed in a Top-Down design method and divided into different modules. It is programmed by Verilog Hardware Describe Language, and finally put into use after being verified by FPGA.

Key words: UART, SoC, AMBA, Verilog

摘要： 在“双向有线DTV信道传输SoC芯片”中，采用了AMBA总线作为片上总线，为了与外部设备进行串行通讯，必须设计采用AMBA总线接口的UART。本文介绍了UART的功能结构与实现方法。设计中采用Top-Down的设计方法进行模块化设计，使用Verilog语言进行描述，最终用FPGA验证通过并投入实用。

关键词: 通用异步收发器, 片上系统, AMBA, Verilog