单片机六路抢答器毕业论文.doc

（　2011届） 毕业设计（论文） 题 目： 单片机六路抢答器　 姓　　名：　　 　 　　　 　　　 专　　业：　　 电子信息工程 　　　 班　　级：　　　 　 　 学 号： 指导教师：　　　　 　　　　 导师职称：　　　 　 　 　　 　　 　　　年 　 Six Way Responder Abstract As a tool, the first answer device has been widely used in all kinds of intelligence and knowledge contests occasions. However, it is not used so frequently due to its production complexity, lacking of reliability and reducing interest. Although a unit can afford it, it is rarely used yearly. Meanwhile, because of the long-term storage, its electronic devices are easy to be damaged. Some activities are likely to be affected because it is quiet trouble to repurchase these spare parts and time-wasting. This First Answer Device is designed to solve these problems. Currently, schools, enterprises and institutions, such as television and commercial organizations for the selection of personnel and selection carried out contest winning more and more intelligence and knowledge for a variety of competitions to provide an objective and fair decisions quickly in various forms Responder gradually become a commercial electronic products. Small-scale contest of which constitute a majority, compared to other large, complex Responder, Responder based on single chip with its simple and more economical, practical and other special by everyone of all ages. Key words: time；the first answer device；AT89S52；graduation project …… 目录 摘 要 IV Abstract V 1 绪论 1 1.1课题的来源 1 1.2课题的意义 1 1.3国内外发展现状 1 1.4课题研究的主要内容 1 2设计要求与方案论证 2 2.1 设计要求 2 2.2方案论证 2 3方案的总体设计 3 3.1 AT89S52的介绍 3 3.1.1 主要性能 3 3.1.2 功能特性描述 3 3.1.3 引脚介绍 4 3.2硬件电路总框图 5 3.3 程序系统结构图 6 4详细设计 8 4.1硬件设计及其功能介绍 8 4.1.1 系统原理图 8 4.1.2 输入电路 9 4.1.3 时钟电路 10 4.1.4 复位电路 10 4.1.5 数码管显示电路 11 4.1.6 发声电路 12 4.2 实物演示 13 总结 16 致谢 17 参考文献 18 附录 19  1 绪论 1.1课题的来源 抢答器是一种在各种知识或者智力竞赛中被广泛使用的工具，作为一种工具抢答器的使用频率比较低，而且存在着制作复杂和可靠性低的问题。作为一个单位，虽然在经济上可以承受买一台抢答器，但是使用频率太低