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AM335x 能不能在不接PHY芯片时使 rmii1_refclk 输出50Mhz的时钟??

AM335x 能不能在不接PHY芯片时使 rmii1_refclk 输出50Mhz的时钟??


 现在有一块开发板,开发板上有两个千兆网卡, 想使用50MHz的RMII时钟信号,自己没有测通,
希望牛人指导一下。