Phy chip receives the clock sent clock is how to produce?-CodePudding

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Phy chip receives the clock sent clock is how to produce?

Time：11-28

I said see hand receive clock and send clock are PHY itself, but PHY how to produce the clock? PHY has its own crystals?

CodePudding user response:

Ethernet PHY need 25/50 MHz clock, MII/RMII need clock is different, some manufacturers of chip RMII need 50 m clock,

CodePudding user response:

He also needs for clock, general is 25 m, and then according to the need and configuration has its own internal frequency doubling