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DP83867IS: Ethernet-SGMII-Ethernet bridge / SGMII "dummy" host

Kajetan Veprek
Prodigy 40 points
Part Number: DP83867IS

Hello,

We are using the DP83867IS in one of our designs, where our device is a client. The device already works with a 3rd party SGMII host.

For debugging/development we would like to use the SGMII-interface of our device with an “as simple as possible” host.

 

On our device the strap pins are configured as follows:

  • RX_D0  mode 1 (open)
  • RX_D2  mode 1 (open)
  • RX_CTRL  mode 3
  • GPIO_0  mode 1 (open)
  • GPIO_1  mode 1 (open)
  • LED_2  mode 1 (open)
  • LED_1(RGZ)  mode 1 (open)
  • LED_0  mode 2 

 

Simply connecting two of our devices did not work out of the box.

  • Is it necessary to configure the chip differently for the host side?
  • Do we have to use the MDC/MDIO interface?
  • Do you have other hints how to achieve a Ethernet-SGMII-Ethernet bridge?
  • Either with two DP83867IS, or with a different counterpart?
  • Are there maybe even ardiuno/raspberry style projects that can be easily adopted?

Kind regards,

Kajetan Veprek

  • 0
    TI__Expert 5670 points
    Hi Kajetan,

    - If both devices are strapped correctly as you described, there is no need to configure the host differently.

    - There is no need to use MDC/MDIO. However, it would be helpful to read the Strap Configuration Status Registers to confirm the straps are indeed correct. Reading PHY Status Registers and Interrupt Status Registers would help as well.

    - Can you provide more details about what you want to achieve with Ethernet-SGMII-Ethernet?

    - Please follow this link for reference design using DP83867: www.ti.com/.../toolssoftware

    Regards,

    Hung Nguyen