(Typical application with a 32.768 kHz crystal)

STM 32.768KHz 低速外部时钟典型应用说明

The low-speed external (LSE) clock can be supplied with a 32.768 KHz crystal resonator oscillator. The resonator and the load capacitors have to be placed as close as possible to the oscillator pins in order to minimize output distortion and startup stabilization time.

通常情况下，我们使用一颗32.768KHz晶体谐振器来为芯片提供低速外部（LSE）时钟源。32.768KHz晶体谐振器和负载电容器的位置尽可能靠近芯片引脚，以便最大程度降低晶振输出信号的失真度和晶振启动所需的稳定时间。

Note:

An external resistor is not required between OSC32_IN and OSC32_OUT and it is forbidden to add one.

严禁在OSC32_IN和OSC32_OUT之间增加任何外部电阻。