功能有时钟，年月日，秒表，闹钟，四个按键可调，设置时间，年月日，切换，调大调小-Calendar: function clock, year, month date, stopwatch, alarm clock, four buttons adjustable, set the time, years on, switch, transfer major small

单片机程序，数字时钟，时分秒均可调节，可一键暂停或启动或复位，带dsn设计图，可直接仿真。(Microcontroller programming, digital clock, minutes and seconds can be adjusted, can be a key to start or pause or reset, with dsn design, direct simulation.)