基于DS1302的万年历设计毕业设计.doc

编号： 实训(论文)说明书 题 目： 基于DS1302的万年历 院 （系）： 专 业：机械设计与制造及其制动化 学生姓名： 学 号： 指导教师： 2010年 1月　10日 摘 要 随着科技的快速发展，时间的流逝,至从观太阳、摆钟到现在电子钟，人类不断研究，不断创新纪录。美国DALLAS公司推出的具有涓细电流充电能的低功耗实时时钟电路DS1302。它可以对年、月、日、周日、时、分、秒进行计时，还具有闰年补偿等多种功能，而且DS1302的使用寿命长，误差小。对于数字电子万年历采用直观的数字显示，可以同时显示年、月、日、周日、时、分、秒和还具有时间校准等功能。该电路采用AT89S52单片机作为核心，功耗小，能在3V的低压工作，电压可选用3~5V电压供电。 综上所述此万年历具有读取方便、显示直观、功能多样、电路简洁、成本低廉等诸多优点，符合电子仪器仪表的发展趋势，具有广阔的市场前景。 关键词：时钟电钟；DS1302；动态扫描；单片机 Abstract Along with the rapid development of technology, the passage of time, from concept to the sun,until now electric clock, human pendulum clocks are continuously research and constant innovation of records. American DALLAS company launched with Juan fine current charge of low-power real-time clock circuit DS1302. It can to year, month, day, Sunday, when, minutes and seconds on the clock and also has a leap year compensation and other functions, and DS1302 of long service life and small error. For digital electronic calendar by using object digital display, can also shows that year, month, day, Sunday, when, minutes and seconds and still have timecalibration, and other functions.This circuit adopts AT89S52 SCM as the core, low consumption, can in the low voltage 3V work, voltage can choose 3 ~ 5V voltage power supply . To sum up the calendar has read convenient, direct display, functional diversity, simple circuit, low cost, and many other advantages, conform to the trend of the development of electronic instruments, and has a broad market prospect. Key words:Clock actuated;DS1302；Dynamic scanning;MCU 目录 引言 …………………………………………………………………………………………4 1 设计要求与方案论证…………………………………………………………………4 1.1 设计要求……………………………………………………………………………………4 1.2系统基本方案选择和论证………………………………………………………………4 1.2.1单片机芯片的选择方案和论证 ……………………………………………………4 1.2.2 显示模块选择方案 和论证 ………………………………………………………4 1.2.3 时钟芯片的选择方案和论证 ………………………………………………………5 1.3 电路设计最终方案决定…………………………………………………………………5 2 系统的