本程序以单片机为核心设计一个多功电子表，具有电时钟和跑表功能。做时钟时在4位LED 显示器上显示分、秒，做跑表时显示范围000.0秒~999.9秒并具有跑表启动和跑表复位功能键。-procedures to the microcontroller as the core design of a multi-functional electronic watches, and clocks -- with stopwatch function. Clock done at the four LED display shows minutes and seconds. do stopwatch displayed scope ~ 000.0 seconds and 999.9 seconds with stopwatch and the stopwatch started reset function keys.