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C6678 SGMII SerDes loopback mode Configuration

Daisuke Maeda
Guru 20035 points

How is the SGMII SerDes loopback mode configured? Is there the configuration example?
Is LOOPBACK field in the SerDes Registers (SGMII_SERDES_CFGRXn, SGMII_SERDES_CFGTXn) only set to loopback mode?

Best regards,

Daisuke

 

  • 0
    Guru 20035 points

    Hi,

    I would appreciate your prompt reply.

    Best regards,

    Daisuke

     

  • 0 in reply to Daisuke Maeda
    Guru 20035 points

    The following loopback modes are supported.

      - MAC transmit to MAC receive loopback mode (digital loopback)

      - MAC receive to MAC transmit loopback mode (FIFO loopback)

      - SGMII or SerDes loopback modes (transmit to receive)

    The User's Guide, Section 2.4.3.1 in SPRUGV9D, describes the Digital Loopback.
    The LOOPBACK bit in SGMII Control Register is used for this Digital Loopback.
    I guess the LOOPBACK bit in the MAC Control Register is used for the MAC's digital loopback.
    Does this Digital Loopback mean the SGMII loopback mode?

    The PDK example supports this mode.

      \pdk_C6678_1_1_2_6\packages\ti\drv\pa\example

    About other modes, are there the details and the configuration example?

    Best regards,

    Daisuke