目 录
摘 要..............................................................................................................................I
ABSTRACT ..................................................................................................................II
目 录 ..........................................................................................................................III
第一章设计要求及各部分电路设计.............................................................................1
1.1 设计要求：............................................................................................................1
1.2 电路设计思路：....................................................................................................1
1.3 实验板整体电路设计：........................................................................................1
1.3.1 循环流水灯电路 .............................................................................................1
1.3.2 按键中断电路 .................................................................................................2
1.3.3 数码管显示电路 .............................................................................................2
1.3.4 蜂鸣器电路 .....................................................................................................3
1.3.5 编程电路 .........................................................................................................3
1.4 电源：....................................................................................................................4
第二章 电路设计过程及元器件的简介.....................................................................5
2.1 AT89S51 单片机概述 ...........................................................................................5
2.1.1AT89S51 单片机引脚功能..............................................................................5
2.1.2 主要特性 ......................................................................................................8
2.1.3 单片机的软件及数据如何存放 ..................................................................9
2.1.4 单片机如何运行程序 ................................................................................9
2.1.5 CPU 工作过程的介绍 .............................................................................10
2.1.6 芯片擦除 ....................................................................................................11
2.2 RS-232 的介绍 ..................................................................................................11
2.3USB 的简单介绍..................................................................................................12
2.5 MAX232 的简单介绍......................................................................................13
第三章 课题的整体设计电路及其基本原理...........................................................15
3.1 电路板设计及其制作..........................................................................................15
3.2 电路的基本原理：..............................................................................................15
3.3 调试过程： .........................................................................................................15
3.4 路问题及解决方法..............................................................................................16
致 谢 ...........................................................................................................................17
参考文献 .......................................................................................................................18
附录 1:元件清单...........................................................................................................19
附录 2：实验源程序 ....................................................................................................20
