LED数字钟的设计.doc

LED数字钟的设计 摘要：数字钟是一种用数字电路技术实现时、分、秒计时的装置，与机械式时钟相比具有更高的准确性和直观性，且无机械装置，具有更更长的使用寿命，因此得到了广泛的使用。 数字钟从原理上讲是一种典型的数字电路，其中包括了组合逻辑电路和时序电路。目前，数字钟的功能越来越强，并且有多种专门的大规模集成电路可供选择。 从有利于学习的角度考虑，这里主要介绍以中小规模集成电路设计数字钟的方法。经过了数字电路设计这门课程的系统学习，特别经过了关于组合逻辑电路与时序逻辑电路部分的学习，我们已经具备了设计小规模集成电路的能力，借由本次设计的机会，充分将所学的知识运用到实际中去。 本次课程设计要求设计一个数字钟，基本要求为数字钟的时间周期为12小时，数字钟显示时、分、秒，数字钟的时间基准一秒对应现实生活中的时钟的一秒。供扩展的方面涉及到定时自动报警、按时自动打铃、定时广播、定时启闭路灯等。因此，研究数字钟及扩大其应用，有着非常现实的意义。 关键词：数字钟、组合逻辑电路、时序电路。 Digital Clock Design Abstract: The digital clock is a digital circuit technology with hour, minute, second timing device, compared with the mechanical clock has a higher accuracy and intuitive, and no mechanical devices have a more longer life, therefore has been widely used. Digital clock from the principle of speaking is a typical digital circuits, including combinational logic circuits and sequential circuits. At present, the digital clock function more and more strong, and there is a wide range of specialized large-scale integrated circuits to choose from. Conducive to learning from the point of view, here mainly to introduce small and medium-scale integrated circuit design method of digital clock. After a digital circuit design of this curriculum a systematic study, especially after about combinational logic circuits and sequential logic circuit part of the study, we already have a design capacity of small-scale integrated circuits, borrow from the design of this opportunity to reflect on the full study knowledge applied to practice, go. The curriculum design requirements for the design of a digital clock, the basic requirements for the digital clock the time period of 24 hours, digital clock display hours, minutes, seconds, minutes benchmark figure corresponds to one second in real life the second clock. For expansion relates to the timing of the automatic alarm, automatic playing time bell, regular radio, street lamps, such as regular headstock. Therefore, studying digital clock and to expand its applications, has a very p