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DSP有源晶振时钟信号是正弦波还是方波



请问各位,C6747外接了一个24M有源晶振,应该选择方波还是正弦波时钟信号?其他DSP呢?处理器时钟信号需求在手册哪里有明确说明?

以下是我同一设计上两批板子上的晶振输出信号,波形都很奇怪,既不像方波也不是标准正弦波。这两个波形有问题吗?谢谢!