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DP83867IS: SGMII RECOVERY CLOCK

IBRAHIM P
Prodigy 80 points
Part Number: DP83867IS

Hi,

In our design DP83867IS used as an SGMII configuration, In the case of SGMII configuration, we need to get the recovery clock of 125MHz from the CLK_OUT pin. Is this possible? also please mention the configuration setting

  • 0
    TI__Mastermind 27072 points

    Hi Ibrahim, 

    Yes, it is possible to output the 125MHz recovered clock to the CLK_OUT pin. You can do this by setting register 0x0170 equal to 0x0010. Since register 0x0170 is part of the extended register set, you will have to use the sequence described in section 8.4.2.1.8 of the datasheet, also listed here:

    1. Write register 0x0D to value 0x001F.

    2. Write register 0x0E to value 0x0170

    3. Write register 0x0D to value 0x401F.

    4. Write register 0x0E to value 0x0010.

    Section 8.3.3 of the datasheet describes the other possible configurations of the CLK_OUT pin. 

    Thanks,

    David