ʾʹõԴ
LPTIMTriggerⲿ  --   PB6
LED                     --   PB14
LXTAL_IN                --   PC14
LXTAL_OUT               --   PC15

ʾḶ́
1ϵϵͳʱPLLʼLED1 GPIOرLED
2LPTIM1ʼLPTIM1ʱΪڲLXTALʱΪڲLXTALⲿGPIOEXTILPTIM1¼MCU
   λΪ32767Ϊ65535ʱģʽ
3LED1stopģʽ
4ⲿźشLPTIM1LPTIM1λֵ32767ʱЧĴźʱ¼MCUѺLPTIM1ֹͣ
5ѺLED1Ϩ

ע⣺
1stopģʽϵͳʱPLLرգѺϵͳʱΪRCH2Ƶ

