文档介绍：基于AT89C51单片机电子时钟的设计
摘要
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。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而51 单片机是各单片机中最为典型和最有代表性的一种。由于它具有功能强,体积小,功耗低,价格便宜,工作可靠,使用方便等特点,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,本文介绍单片机AT89C51结合74LS373设计时钟定时控制器实现的方案。74LS373为三态输出的八组缓冲器。本系统将单片机AT89C51内部时钟读出并通过七段数码管(LED)显示出来,通过按键设定的时间来改变系统的闹钟时间,单片机依据设定的时间来响铃,从而实现了系统的智能化。
关键词: AT89C51 电子时钟 74LS373
Abstract
MCU is a CPU、RAM、ROM、 timing、 counting and multiple interfaces in one microcontroller. In recent years, with the field puter ration in munity and the development of large-scale integrated circuits, single-chip applications is steadily moving toward depth and 51 single-chip is the most typical and most representative one. Because of its strong functions, small size, low power consumption, cheap, reliable and easy to use and so on, it is particularly suited to control systems and, more widely used in automatic control, intelligent instruments, meters, data acquisition, military products, as well as household appliances and other fields, This article describes the design of single-chip puter bination 74LS373 clock timing of the program controller. 74LS373 tri-state output for the eight sets of buffers . AT89C51 single-chip puter of the system will read out the internal clock and through the LED display, through the button to set the alarm clock to change the system time, single-chip based on the time to set alarm clock processing, thus realizing the intelligent system.
Key words: AT89C51 MCU; Electronic clock; 74LS373
目录
摘要 1
Abstract 1
目录 2
第一章单片机概述 3
3
3
4
第二章 MCS-51单片机简介 6
MCS-51单片机结构及引脚说明 6
(CPU)的结构 8
AT89C51单片机的存储器 10
第三章 LED数码管及74LS373简介 14
数码管的分类 14
数码管的驱动方式 14
数码管应用 15
数码管使用的电流与电压 15
74LS373简介 15
第四章电子钟功能介绍 16
系统功能介绍 16
软件设计流程 16
电子钟程序清单 18
第五章电子钟软件实现仿真 19
单片机模拟调试软件Keil 19
Proteus软件简介 22
电子时钟仿真 23
整机仿真及调试 25
附录 29
第一章单片机概述

单片机