【matlab编程代做】基于VHDL语言Intel8251可编程串行扩展.docVIP

基于VHDL语言的Intel8251可编程串行扩展 接口芯片设计 摘要 随着集成电路技术的发展，电子设计自动化（EDA）逐渐成为重要的设计手段，已经广泛应用于模拟与数字电路系统等许多领域。电子设计自动化是一种实现电子系统或电子产品自动化设计的技术，它与电子技术，微电子技术的发展密切相关，它吸收了计算机科学领域的大多数必威体育精装版研究成果，以高性能的计算机作为工作平台，促进了工程发展。EDA的一个重要特征就是使用硬件描述语言（HDL）来完成的设计文件，VHDL语言是经IEEE确认的标准硬件语言，在电子设计领域受到了广泛的接受。本文介绍了串行通信的基本理论；综述了EDA技术的发展概况，介绍了MAX+PLUSll软件；熟悉Intel8251基本结构和工作原理；最后设计仿真了Intel8251的顶级功能模块和子功能模块. 关键词:VHDL语言；MAX+PLUSll软件；串行收发器 ABSTRACT With the technical development of integrated circuit( IC), the electronics design automation(EDA) becomes the important design means gradually, and already extensively used in many fields such as simulation and digital electrocircuit system. The electronics design automation is a kind of technique that carries out the electronics system or the electronics products to automate the design. Closely related with the electronics technique and the technical development of micro-electronics, absorbed the latest result of the computer science researching, using the computer with the high capability, the electronics design automation promoted the engineering development. A significant characteristic of EDA is to complete the design files by the hardware description language ( HDL),VHDL is a standard hardware language which is validated by the IEEE and is acceptable extensively in the field of the electronic design. This paper introduces the basic theory of serial communication ,generalizes developing history of EDA, some simulative software such as software of MAX+PLUSll, acquaint with the basic structures and the work principles of 8251; At last, the design of the top-class function module and sub- function module of 8251 is passed in simulation. Keywords:Language of VHDL; MAX+PLUSll software; Serial Transceiver 1 引言 1．1 课题研究的背景 在系统中嵌入式CPU 往往要通过各种串行数据总线与外界进行通信，在应用中，异步的串行数据通信用得较多，而通用异步收发器（UART Universal Asynchronous Receiver/Transmitter ）在其中扮演着重要角色，它可以完成数据的串并转换，即把并行数据按照通信波特率转化为通信协议中规定的串行数据流，也可从串行数据流中取出有用数据转变为并行数据。而UART 与CPU 接口简单，CPU只需通过执行读写操作即可完成收发数据，从而完成与外界的通信。有许多现成的芯片可以实现UART的功能：如常