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摘 要随着科学技术的发展和社会生产的需求，IC卡考勤系统成为近几年来快速发展的一项新型的综合管理系统，可以满足现代化的考勤管理，极大地提高了安全性和可靠性。
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本文首先介绍了IC卡考勤系统的结构组成以及功能特点。分析了无线射频读写技术的基本原理和实现方式，对于读写器和Mifare非接触式射频卡进行了系统的研究，通过图文结合详细地阐述了如何实现射频刷卡的过程。然后，本文重点分析了STC89C52单片机模块、射频刷卡读写模块、数据存储模块、时钟更新电路、液晶显示模块、报警电路、系统复位电路及电源供电模块，包括基本原理、功能要求、通信方式和互相之间的控制关系，从而完成硬件电路的设计。进而，根据系统运作的流程以及需要实现功能的具体分析，设计出相应的软件流程图。32079
同时，对本次系统设计结果进行总结，从系统的稳定性、安全性、高效性等方面进行分析，提出需要改进和完善的部分和对未来发展的憧憬。
毕业论文关键词：考勤系统 无线射频读写 单片机 IC卡
Abstract
With the development of science and technology and the demand of society manufacturing, IC card attendance system has been developing a new type of integrated management system rapidly in recent years. The IC card attendance management can meet the modernization, which greatly improves the reliability and security .
Firstly，this paper concretely introduces the structure of IC card attendance system ,the functions and characteristics , the design of hardware circuit and the software development processes. It also analyses of the basic principle and realization manner of wireless radio frequency technology to read and write. At the same time，it systematically studies the reader-writer machine and Mifare contact-less IC card . It elaborates that how to realize radio frequency card processes through graphics and textures combination in detail. Secondly, this paper focuses on the analysis of the STC89C52 micro-controllers module, reader module, liquid crystal display module, data storage module, clock circuit, control circuit, the alarm reset circuit and power supply module ，including the basic principles, functional requirements, control of communication and mutual relations between the and the relationships among them, thereby completing the design of hardware circuit. Then, according to the system operation processes and the specific analysis of the functions which need to be achieved , i design the corresponding software flow chart. Finally，completing the debugging of the whole system through the hardware and software charts design of the combination .
At the same time， i should also summarize the results of the design of the system and analysis the system from stability, security, efficiency and other aspects. Last but not least, putting forward some parts to be improved and perfected and the beautiful vision for the development.
Key Words：card attendance system wireless radio frequency technology to read and write micro-controller IC card
目 录
摘 要 I
Abstract II
1 绪论 1
1.1 课题研究背景及意义 1
1.2 课题国内外发展现状 1
1.3 课题研究的任务及内容 2
2 考勤系统与关键技术介绍 3
2.1 考勤系统简介 3
2.2 考勤系统特点 3
2.3 考勤系统功能 3
2.4 无线射频读写技术 3
3 硬件电路设计 5
3.1 硬件电路总体设计 5