本文为数字时钟的设计介绍，具体说明如何使用QuartusⅡ软件设计一个基于EP1C6Q240C8芯片的数字钟。该数字钟具备以下功能：1.正常计时2.校正时间3.闹铃设置4.整点报时。-This paper describes the design of a digital clock, specifying how to use the software to design a QuartusⅡ EP1C6Q240C8 chips based on the digital clock. The digital clock has the following features: 1. normal time alarm setting 2. 3. 4. correction time hourly chime.