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DP83867CS: SGMII Clock

Part Number: DP83867CS

Hello

            For SMII_SIN is synchronous to the differential SGMII clock input, but we can see any pin indicated for SGMII clock input. Why has no any SMII clock input pin of DP83867? 

   Another questions, DP83867CS has SGMII_COP/N pins, but CPU do not have SGMII clock pins to connect SGMII_COP/N pins for SGMII clock output. Does ,SGMII clock output must needs to connect for communication? Thank you. 

BR

Patrick

  • Hi Patrick,

    SGMII input of the PHY can perform clock recovery from data. Separate sgmii clock input is not required to the PHY. Similarly, some MAC can perform clock recovery from SGMII data and they also don't need input clock. In such cases, SGMII_COP/N should be left unconnected.

    -Regards

    Aniruddha