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DP83848-EP: RMII Clocking

Part Number: DP83848-EP


We are using an external 50MHz oscillator connected to X1, as required by RMII mode. Is it more correct to pass this direct X1 clock signal to the MAC, or is it better to take this from the 25MHz_OUT signal, which will be 50MHz in this configuration. Our main concern is whether the skew between the X1 input and 25MHz_OUT will cause a problem.