文档介绍：基于单片机的多功能数字钟的设计
摘要：本设计论文介绍了用AT89C2051单片机控制的数字钟的硬件结构与软件设计，给 出了汇编语言源程序。此数字钟是一个将“时”、“分”、“秒”显示于人的视觉器官的计 时装置。它的计时周期为12小时，显示满刻度为12时59分59秒99毫秒，另外应有 校时功能。电路由时钟脉冲发生器、时钟计数器、译码驱动电路和数字显示电路以及时 间调整电路组成。用晶体振荡器产生时间标准信号，这里采用石英晶体振荡器。根据 60秒为1分、60分为1小时、24小时为1天的计数周期，分别组成两个60进制（秒、 分）、一个12进制（时）的计数器。构成秒、分、时的计数，实现计时的功能。显示器 件选用LED七段数码管。在译码显示电路输出的驱动下，显示出清晰、直观的数字符号。 针对数字钟会产生走时误差的现象，在电路中就设计有有校准时间功能的电路。
关键词：单片机；AT89C2051；数字钟；计时
Based on SCM multi-purpose digital clock design
Abstract:The paper mainly presents the hardware and software design of the digital clock using AT89C2051. The source program using assemble Language is given. This digital clock is a time-device，which can display "hour", "minute", "second". Its time period is 12 hours and the full scale of the display is 12 hours, 59 minutes, 59 seconds and 99 milliseconds and it has the function of time adjustment. The circuit consists of the clock pulse generator, the clock counter, decoding drive circuit, digital display circuit and the time adjustment circuit. It generates time standard signal using crystal oscillator, here is the quartz crystal oscillator. Because 60 seconds is 1 minute, 60 minutes is 1 hour and 24 hours is 1 day, we uses two counters of 60 parts and a counter of 12 part separately to constitute the count of percentage of second, second, minute, and hour. So it can realize time function. Display component selects seven-segment numerical tube LED. Driven by decoding output circuit, it can display showing clear and intuitive figures. Due to walking error of digital clock, we design time calibration circuit in the system.
Key words: Single-chip microcomputer; AT89C2051; Digital clock; Time
第1章绪论 1
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第2章 数字钟的功能实现与设计方案 2
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第3章数字钟的硬件系统设计 5
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(AT89C2051)的选择 5
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