本文介绍了利用quartus II软件进行的多功能数字时钟设计，实现保持、清零、快速校时、快速校分、整点报时、彩铃闹钟、星期显示等功能，并对每一模块分别进行解释。-This paper describes quartus II software, multi-functional digital clock design, implementation, maintain, clear, fast school, the rapid s