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DP83822I: LED_1 / GPIO1 for EtherCAT LINK/Activity

Koshi Ninomiya
Expert 5965 points

Part Number: DP83822I

Tool/software:

Dear Team,

My customer is evaluating the DP83822I in their system. 
They would like to use the LED_1/GPIO1 pins of the DP83822I to display the link/activity of the EtherCAT communication.
It seems that LED_1/GPIO1 pins cannot be set to link/activity in the pin strap setting.
But is it correct to think that it can be used for link/activity display by setting the LEDCFG1 register [11:8] of 0x0460 to 1000?
Is there anything I should be aware of when doing this?

Best Regards,

Koshi Ninomiya

  • +1
    TI__Mastermind 26791 points

    Hi Ninomiya-san,

    LED_1 can be configured via register after the PHY is turned on. Note that LED_1 will always be configured to your pin strap setting so the register 0x0460 will always have to be configured to the correct value after power-on/reset happens. 

    Please let me know if you have any other questions.

    Best, 
    J