LMK00334按照配置选择clkin1的时钟输入,buffer输入端有波形,输出端无波形一直保持3.3V的上拉。
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clkin1的时钟输入
您好,CLKIN的输入幅值为多大?看波形是正负信号输入吗?另外,电路图看不太清,CLKIN_SEL1和CLKIN_SEL0这里上拉阻值为多大?4.7K是吗?
我担心您这里的上拉阻值不对,不满足CLKIN的VIh和Vil的要求。