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DP83867 application for mode 1(0)

Jacky Chen29
Genius 4735 points

Hola Rob & TI,

I'm still no received your comment of my another question and I re-post my question again below：

My original question is "PHY address = 0；we connected all of LED to the ground and if the current low as define value and it will assumed mode 0."

You replied "It is not recommended to connect the pins directly to ground, if that is what you mean. For LEDs, follow figure 18 in the datasheet for mode 1(0)."

I just want to confirm with you as below：

1. Let SPEED_SEL = 0、PHY_ADD[3:0] = 0.

2. DP83867IR/CR(48pin)：Quote Figure 22.(Strap Circuit = 0) & Figure 23. & Table 5.(4-Level Strap Pins), and we got SPEED_SEL = 0、PHY_ADD[3:0] = 0.

3. After reset and it can support 10/100/1000, and MIDO(PHY) address = 0.

About Figure 18. --> I think it unable to establish because of it only has RGMII interface with 48pin and has no CRS/COL..

  • 0
    Genius 4735 points
    Can someone help to reply this issue foe urgent case ? thanks.
  • 0
    Genius 4735 points

    It's another a week passed again！Does someone of TI familiar with this part？

  • 0 in reply to Jacky Chen29
    TI__Mastermind 18425 points

    Hello Jacky,

    My apologies for the delayed response. In the beginning of your post, you refer to a previous conversation about LED pin being in Mode 1. It is correct, we recommend to NOT connect the LED pins directly to ground. However, we have revised the datasheet and the figure numbers might have changed. Please refer to figure titled "Example Strap Connection" for Mode 1 LED connections.

    I would also like to add a clarification that the datasheet includes 3 devices with certain distinguishing factors.

    DP83867IR-PAP: 64 pin QFP Package (MII, GMII, RGMII)

    DP83867IR-RGZ: 48 pin QFN Package (RGMII only)

    DP83867CR-RGZ: 48 pin QFN Package (RGMII only)

    In your question, I can see that you refer to the 48pin RGZ devices. The RGZ device support the SPEED_SEL0 strap only, SPEED_SEL1 is not supported. Please refer to the "RGZ Speed Select Strap Details" Table.

    SPEED_SEL0 will advertise 10/100/1000 mode, so what you observe is correct. Figure 18 is MII connections diagram and its not supported by the 48 pin RGZ devices.

     

    Hope this helps!

    -Regards,

    Aniruddha

  • 0 in reply to Aniruddha Khadye
    Genius 4735 points

    Hola Aniruddha,

    This is great and thank you very so much.