Synchronous deviation caused by limitation of the timer has already been studied by numerous scholars, however, Synch-sampling in the instance of signal cycle instability has been less discussed.

定时器最小定时引起的同步偏差已有众多学者研究，信号周期飘移下的同步采样则较少有人涉足。

Fitted with built-in timer and mechanical cycle counter.

内置计时器及机械循环计数器。

Hutchison few overflow timer, interrupt, will take anti-P1.0 pretext that a square wave cycle.

定时器记数溢出后，产生中断，将P 1.0借口取反即得周期方波。

This paper introduces the way of measuring the cycle of frequency by making use of timer in the single-chip microcomputer to collect the parameters of frequency.

针对低频频率量，介绍了利用单片机的片内定时器，采用测周法实现频率量采集的方法。