基于单片机的数字钟设计摘要.doc

基于单片机的数字钟的设计与实现 摘 要 近年来随着计算机在社会领域的渗透和大规模集成电路的发展，单片机的应用正在不断地走向深入，因此特别适合于与控制有关的系统，越来越广泛地应用于自动控制，智能化仪器，仪表，数据采集，军工产品以及家用电器等各个领域，单片机往往是作为一个核心部件来使用，在根据具体硬件结构，以及针对具体应用对象特点的软件结合，以作完善。 本次做的数字钟是以单片机（ATMEGA16）为核心，由于它具有功能强，体积小，功耗低，价格便宜，工作可靠，使用方便等。数字时钟采用了性能优秀的ATMEGA16，结合了共阴极LED、数码显示器、BCD-锁存/7段译码/驱动器，这些元件来控制时钟的显示、调整和校对。通过multisim软件进行仿真制作，达到制作简易数字钟的目的。数字时钟能够准确显示时间（显示格式为时时：分分，24小时制），而且可以显示年、月、日、时、分、秒、周。其硬件部分难点在于元器件的选择、布局及焊接。 关键词：ATMEGA16；数码管显示；键盘输入；USB接口电源 Based on single-chip Digital Clock Design and Implementation Abstract In recent years, with the field of computer penetration in the community and the development of large-scale integrated circuits, microcontroller applications are continually deepening.It is particularly suited to control systems and, more widely used in automatic control, intelligent of instruments, meters, data acquisition, military products, as well as household appliances and other fields. single-chip microcomputer often use as a core component,in accordance with the specific hardware architecture, as well as application-specific features of the software object to be perfect. This article is based on single-chip digital clock (ATMEGA16) as the core, because it has a strong functions, small size, low power consumption, cheap, reliable and easy to use and so on. Digital Clock using the excellent performance of ATMEGA16, combined with a total of cathode LED, digital displays, BCD-latch / 7 decoder / driver, these components to control the clock display, adjustment and proofing. Through the production of multisim simulation software to create simple digital clock purposes. Able to accurately show the number of clock time (display format hh: mm: seconds seconds, 24-hour system), and can display year, month, day, hour, minute, second, week. Difficult part of the hardware is the choice of components, layout and welding. Key words: ATMEGA16; digital tube display; keyboard input; USB port power supply 目 录 1 前 言 1 2 系统设计 2 2.1 电路组成及工作原理 2 2.2 硬件部分 2 2.2.1 单片机系统 2 2.2