多功能数字电子表

（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512Hz的低音，在“59”分钟的第59秒发频率为1024Hz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。

其他：

1．晶振为12 MHz

2. 采用CPLD 器件为ALTERA 的EPM7064SL-44

3．采用数码管显示-Multifunction digital electronic watch (1) normal time: second (60), points (60), hours (24) counts　second timing frequency of 1Hz, dynamic scanning real-time display of digital works timekeeping hour, minutes and seconds. (2) The whole point timekeeping: Every whole point of the buzzer in the " 59"　minutes of 51,53,55,57 second frequency is 512Hz bass made in the " 59"　minutes of the first 59 seconds made the treble frequency is 1024Hz . (3) school: school hours, hours of digital tube display frequency of 4Hz counts　school hours, the display of digital 4Hz for counting　school, seconds cleared. Others: 1. Crystal is 12 MHz 2. Using ALTERA CPLD device as the EPM7064SL-44 3. Using digital display