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我们使用LMK04821芯片的单PLL模式,从OSCin输入125Mhz的差分时钟,配置参数如下。
测试中发现,输出的时钟频率基本上是对的,但PLL2不能lock。
请问可能是什么原因?需要如何调查和解决这个问题?谢谢!