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Original question:

DP83822I: DP83822I: Whether "INT/PWDN" pin is used for "Link Status" ?

DP83822I: DP83822I: Whether "COL / GPIO2" pin is used for "Link Status" ?

Rohidas Sawant76
Intellectual 380 points

Part Number: DP83822I

Hello,

Can I use "COL / GPIO2" pin of the PHY DP83822I as output for "Link Status" ?

i.e.:

COL / GPIO2 (Pin 29) = "Low" (0V) --- for Link Down

COL / GPIO2 (Pin 29) = "High" (3.3V) --- for Link Up

Once this pin toggles we can read BMSR 0x0001 to check Link Status.

  • 0
    TI__Expert 5425 points

    Hi Rohidas,

    It is possible to use "COL/GPIO2" pin for link status. In register 0x0463, you will have to set bits[2:0] (COL/GPIO_2 Control) to 0x001. Then, in register 0x0025, set bits[6:3] (MLED Configuration) to 0x0000. This should set the "COL/GPIO2" pin to act as a link indicator, same as the default function of the "LED_0" pin. You can refer to the datasheet for more details.

    Regards,

    Adrian Kam