（1）正常计时：秒（60）、分（60）、小时（24）计数；秒计时的频率为1Hz，数码管用动态扫描实时显示计时的小时、分、秒。
（２）整点报时：逢整点蜂鸣器在“59”分钟的第51、53、55、57秒发频率为500Hz的低音，在“59”分钟的第59秒发频率为1000Hz的高音。
（３）校时：
校小时, 显示小时数码管以4Hz的频率递增计数；
校分, 显示分数码管以4Hz的频率递增计数；
校秒, 秒清0。
(1) normal time: second (60), sub (60), hour (24) count; the frequency of second time is 1Hz, the digital tube dynamic scan real-time display time, minute, second.
(2) whole point: a buzzer with a frequency of 500Hz in fifty-first, fifty-third, fifty-fifth and 57 seconds of the "59" minute, and the frequency of 1000Hz in the fifty-ninth seconds of "59" minutes.
(3) school:
The hour is displayed, and the number of the hour digital tube is increased with the frequency of 4Hz.
The score is displayed, and the digit tube is increased by counting the frequency of 4Hz.
School seconds, second clear 0. (2018-07-04, VHDL, 46KB, 下载0次)
具有“秒”、“分”、“时”计时功能，小时按24小时制计时。
具有校时功能，能够对“分”和“小时”进行调整。
具有整点报时功能。在59分51秒、53秒、55秒、57秒发出低音512Hz信号，在59分59秒时发出一次高音1024Hz信号，音响持续1秒钟，在1024Hz音响结束时刻为整点。
With "seconds", "minutes", "hour" timing function, hours at a 24-hour clock time. When a school function, be able to "minutes" and "hours" to adjust.With the whole point timekeeping function. In 59 minutes and 51 seconds, 53 seconds, 55 seconds, 57 seconds sent the bass 512Hz signal, in 59 minutes and 59 seconds to issue a Treble 1024Hz signal, Sound for 1 second, at 1024Hz audio end of the time for the whole point. (2010-01-25, VHDL, 330KB, 下载7次)