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LMK00334: LMK00334周围都正常,输出一直保持高电

Part Number: LMK00334

现象:输入100MHz时钟,输出在任何时候都保持3.3V的高电平

配置: CLKout_EN,CLKin_SEL 均下拉到GND。REFout_EN上拉到3.3v   

供电以及配置都没有问题,芯片也换了新的,请问要如何处理?