摘 要：随着信息时代的到来，数字电子技术的运用已经逐渐渗透到人类生活的各个方面，从个人移动设备到家用电器，从工业自动化到军用设备再到航天技术，数字电子技术的运用度越来越广泛。数字钟作为数字电子技术的基本产品，在人们的生活中发挥着举足轻重的作用。实现一个多功能数字钟的方案更是多种多样，例如可以选取专用的电子钟芯片搭配适当的显示电路再结合一些所需的外围电路组成电子钟，也可以用中小规模集成电路组成电子钟，本设计为基于EDA设计的多功能数字钟，实现了数字钟的年月日时分秒的计时，较时，闹钟等功能。设计中采用硬件语言VHDL实现电路的逻辑设计，通过QUARTUS II软件平台采用自顶而下的设计方法实现电路逻辑时序仿真，验证设计的合理性。93966

毕业论文关键词：多功能数字钟，EDA技术，VHDL语言，模块化设计

Abstract：With the advent of the information age, the use of digital electronic technology has gradually penetrated into every aspect of human life, from personal mobile devices to household appliances, from industrial automation to military equipment to space technology, the use of digital electronic technology more and more widely。 Digital clock as the basic products of digital electronic technology, play an important role in people's life。 Implement a multi-function digital clock scheme is varied, for example can make use of special electronic clock chip with the peripheral circuit of electronic clock display circuit and its need, also can use of small and medium scale integrated circuit, electronic clock, this design is based on the EDA design of multi-function digital clock, realized the digital clock date，month，year when the split second timing, relatively, the alarm clock, and other functions。 Used in the design of the hardware language VHDL realization of circuit logic design, through the QUARTUS II software platform from the top down design method is used for circuit logic timing simulation, verifies the correctness of design。

Keywords：Multi-function digital clock, EDA technology, VHDL language, Modular design

目录

1 引言 4

2 选题背景 4

2。1 课题相关技术的发展 4

2。2 课题研究的必要性 5

3 EDA技术介绍 5

3。1 EDA技术概况与发展 5

3。2 硬件描述语言VHDL 6

3。3 FPGA概述 7

4 系统设计 7

4。1 系统设计功能 7

4。2 系统设计框图 8

4。3 系统设计顶层原理图 8

5 各功能模块设计思想 9

5。1 数码管显示模块 9

5。2 分频模块 10

5。3 时分秒计时模块 10

5。4 年月日计时模块 11

5。5 较时模块 12

5。6 移位模块 13

5。7 闹钟模块 14

6 设计仿真说明 15

6。1 复位仿真 15

6。2 计时仿真 15

6。3 较时仿真