采用AUX_IN输入25MHz时钟,外部配置引脚如图均设为高电平(经测量确为高电平),芯片寄存器为默认,希望能实现芯片手册示例中的输出(156.25MHz和125MHz等输出)。
经测量芯片供电正常,输入时钟正确给入,但都无输出,且PLL_LOCK始终为低电平。求问可能是出了什么问题?
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