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外部晶振起振,倍频输出无信号



使用F5419A,外接12M晶振,使用XT2,使用20PF电容,倍频到25M,示波器检测外部晶振12M正弦波形,但是ACLK,MCLK均无波形输出,这是软件原因还是硬件电路设置不合适?