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用DP83849作了两路以太网,测试发现PHY芯片上所有TX_CLK、RX_CLK都无输出,请专家给予指导,见下图。
我用的dp83822,供电正常,XI、XO的基准时钟也是正常的25M,RXCLK和TXCLK仍然没有时钟输出,是什么原因