单片机时钟显示完整设计.docx

单片机应用技术飞速发展，纵观我们现在生活的各个领域，从导弹的导航装置，到飞机上各种仪表 的控制，从计算机的网络通讯与数据传输，到工业自动化过程的实时控制和数据处理，以及我们生活屮 广泛使用的各种智能IC卡等，这些都离不开单片机。单片机是集CPU,RAM,ROM,定时，计数和多种接 口于一体的微控制器。它体积小，成本低，功能强，广泛应用于智能产业和工业自动化上。而51系列单 片机是各单片机中最为典型和最有代表性的一种。这次毕业设计通过对它的学习，应用，从而达到学习、 设计、开发软、硬的能力。 本文以单片机为核心，釆用串行时钟芯片DS1302o过去多用并行接口的时钟芯片，如MC146818、 DS12887等。它们已能完全满足单片机系统对实吋吋钟的要求，但是这些芯片与单片机接口复杂、占 用地址，数据总线接线多、芯片体积大占用空间多。显示电路釆用LED动态扫描方式，动态扫描方式节 省外部接口资源。 本文通过对一个基于单片机的能实现万年历功能电子时钟的设计，从而达到学习、了解单片机相 关指令在各方面的应用。系统由主控制器AT89C52、时钟电路DS1302、显示电路、按键电路、和复 位电路等部分构成，能实现时钟日历显示的功能，能进行年、月、日、时、分及星期的显示。 关键词：AT89C52芯片 DS1302芯片 C语言 Keil软件 LED动态显示； Abstract SCM rapid development of applied technology, we now live Looking at the various fields, from the missiles navigation devices, to the various instruments on the aircraft control, computer network communications and data transmission, industrial automation to the process of real-time control and data Processing, and we live in the extensive use of the smart IC cards, these are inseparable from the SCM. SCM is set CPU, RAM, ROM, timing, counting on one interface and a variety of microcontrollers. Its small size, low cost, feature strong, smart widely used in industry and industrial automation. And 51 of the SCM SCM is the most typical and most representative one. The graduation project through its study, and thereby to study, design, develop software and hiirdwarc capabilities. Based on SCM as the core, a serial clock chip DS 1302? Past the use of parallel interface chipM clock, such as the MCI4681 DS 12887, and so on. They have been able to fully meet the SCM system to the requirements of real-time clock, but these chips and microcontroller interface complex, occupied address, data bus wiring, chip size of the space and more. LED display circuit using dynamic scan mode, dynamic scan mode external interface save resources? Based on a microcontroller based on the calendar function to achieve the design of electronic clock、so as to achieve learning and understanding of SCM related instruction