The enable-A signal must be released before the pulse-train inputs are enabled.
在允许脉冲序列输入之前，A的通信号必须消失。
SCM through the setup will enable the internal timer T1 pulse input pin T0 control, This can be accurately calculated foisted T0 pin unit time detection of the pulse;
通过单片机的设置可使内部定时器T1对脉冲输入引脚T0进行控制，这样能精确地算出加到T0引脚的单位时间内检测到的脉冲数；
SCM through the setup will enable the internal timer T1 pulse input pin T0 control, This can be accurately calculated foisted T0 pin unit time detection of the pulse;
通过单片机的设置可使内部定时器T1对脉冲输入引脚T0进行控制，这样能精确地算出加到T0引脚的单位时间内检测到的脉冲数；
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