基于51单片机的最小系统板设计.doc

摘 要近年来随着计算机在社会领域的渗透, 单片机的应用正在不断地走向深入，同时带动传统控制检测日新月益更新。在实时检测和自动控制的单片机应用系统中，单片机往往是作为一个核心部件来使用，仅单片机方面知识是不够的，还应根据具体硬件结构，以及针对具体应用对象特点的软件结合，以作完善。 单片机最小系统是在以51单片机为基础上扩展，使其能更方便地运用于测试系统中。本设计主要在51单片机上扩展I/O口，扩展定时器定时范围，扩展键盘显示接口并写好底层程序。关键词 最小系统，扩展，STC89C51, I/O接口 Abstract With the infiltration in the social field of the computer in recent years, the application of the one-chip computer is moving towards deepening constantly, drive tradition is it measure crescent benefit to upgrade day to control at the same time. In measuring in real time and automatically controlled one-chip computer application system, the one-chip computer often uses as a key part, only one-chip computer respect knowledge is not enough, should also follow the structure of the concrete hardware , and direct against and use the software of target’s characteristic to combine concretly, in order to do perfectly. The smallest system one chip computer is in expands at the base of MCS-51 one chip computer. Make it used more convient in the test system. this design mainly expands I/O in the take 51 on chip computer, expands the timer fixed time scope, expands the keyboard to demonstrate the connection and writes the first floor procedure. Keyword minimum system, expand,STC89C52, I/O 目 录 摘要................................................................1 Abstract............................................................2 第1章 绪论.........................................................4 第2章 单片机概述...................................................5 2.1 单片机.........................................................5 2.2 单片机的特点...................................................5 2.3单片机的内部结构 ...............................................6 2.4单片机的引脚功能................................................7 第3章 单片机最小系统................................................9 3.1 单片机最小系统介绍..............................................9 3.1.1 电源供电模块................................................9 3.1.2 复位电路..................