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Original question:

DP83826E: Interrupt pin as wakeup source in embedded Linux

DP83826E: interrupt pin only triggered if WoL arrives

Javier Carrasco
Prodigy 50 points
Part Number: DP83826E

I would like to use the interrupt pin of this chip as a system wake up source when a WoL packet arrives.

The problem is that in order to communicate other event to the MAC, some other interrupt sources must be active and they also make the interrupt pin toggle. Is there any way to make the interrupt pin toggle only if a WoL packet arrives instead of every time an enabled interrupt occurs?

  • +1
    TI__Mastermind 19250 points

    Hi Javier,

    From my understanding, you want to have the status toggle, but you don't want to toggle INT_N pin for any interrupt except WoL.

    I want to clarify the status bits and enable bits in the registers.
    The status bits always have the status independent of whether the enable bit is set.
    The enable bit just enable the indication on INT_N pin.

    Explaining in detail based on Link Status Changed signal,

    1. If bit 5 is set, then bit 13 is set whenever link status changes. The same will be indicated on INT_N pin.
    2. If bit 5 is not set, then bit 13 still is set whenever link status changes, There will be no indication on INT_N pin.

    I hope I have cleared your concern. Please let me know if you need more details.

    --
    Regards,
    Gokul.