有源晶振脚位PIN1：N/C与Tri-state功能说明

N/C

If the product does not have the Tri-state function, no matter how Pin1 is connected, the product will work properly.
如果晶振不具备三态功能，而标注为N/C，说明该脚与内部IC相应引脚的连接为断开（no connection）模式，因此无论如何连接该脚（Pin1），晶振都能正常工作。

Tri-state

Whether Pin1 is connected to Vdd or “floating,” the product will work properly; When Pin1 is connected to GND, the product stops working.
三态功能：无论Pin1连接到Vdd还是”悬空”处理，晶振都能正常工作；

警告：当Tri-state脚连接到GND时，晶振将停止工作。