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原理图
CLKIN波形，由STM32的PWM生成，
可是DRDY始终是低，是不是芯片坏了？
您好，
很可能已经损坏，XTAL1最大耐压DGND–0.3V ~ DVDD+0.3V，上述CLKIN波形已经超出这个范围。
