应用在51单片机控制的数字时钟上，在设计上采用硬件计数与软件计数相结合的方式，并且定时器T0采用了中断方式，优先级最高。-51 single-chip control applications in the digital clock on the design of hardware and software count a combination of counting and the use of the T0 timer interrupt, the highest priority.