本设计要实现一个具有预置数的数字钟的设计,具体要求如下:

1.　　正确显示年、月、日

2.　　正确显示时、分、秒

3.　　具有校时,整点报时和秒表功能

4.　　进行系统模拟仿真和下载编程实验,验证系统的正确性

-designed to achieve this with a number of preset clock design, and specific requirements are as follows : 1. Display correctly, , 2. display correctly when, minutes and 3 seconds. with school, the whole point timekeeping and stopwatch functions 4. for system simulation and download programming an experiment to test the correctness of system