本文介绍了一种同步测周期计数器的设计，并基于该计数器设计了一个高精度的数字频率计。
The design of a counter measuring synchronous period is introduced in this paper. And based on it, a high precision digital cymometer is designed.
介绍了双计数器多周期同步法频率测量原理，给出了用单片机实现的具体实现方案。
The paper introduces the principle of frequency measure based on double-counter and multi-periods pulse synchronization method, and the designing with microprocessor is offered.
假设高信号使能，计数器每个时钟周期进行计数，PWM输出的频率为时钟频率的2次幂分频。
Suppose that Enable is high, the counter counts up every clock cycle, and the frequency of the PWM output is the clock frequency divided by 2 count bits.
应用推荐