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dp83640 RMII朱从模式与同步以太网主从模式的时钟问题

Other Parts Discussed in Thread: DP83640

你好,我从dp83640手册上看到,作为rmii从模式下时,参考时钟由X1引脚引入50MHz,而在文档AN-1730的Figure3当中却都是25M的时钟,如所示,这两者是否矛盾呢?如果作为RMII从模式,RX_CLK与TX_CLK都不使用,那么如何提供rmii的参考时钟呢?

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