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DP83822IF: Link Quality Interrupt of 0x0012 MII Interrupt Status Register #1 (MISR1)

Hirotaka Matsumoto
Guru 27585 points
Part Number: DP83822IF


Hi all

Would you mind if we ask DP83822IF?
We have some questions b15 at adress 0x0012(Link Quality Interrupt of 0x0012 MII Interrupt Status Register #1 (MISR1)).

<Question1>
What does Link Quality mean?
Could you let us know what it means?

<Question2>
When the data of 0x0012 changes from 80F7 to 62F7, is it possible to confirm by what the cause failure occurs?

We need your help.

Kind regards,

Hirotaka Matsumoto

  • 0
    Guru 27585 points

    Hi all

    We are sorry to rush you however could you give us advice?

    Kind regards,

    Hirotaka Matsumoto

  • 0 in reply to Hirotaka Matsumoto
    TI__Mastermind 26320 points
    Hi Hirotaka-san,


    Link Quality Interrupt of 0x0012 MII Interrupt Status Register #1 (MISR1) : Phy decodes the MLT-3 data recieved on line and check whether signal quality is good to ascertain correctness of data. When the link quality is below threshold, it signals the Link Quality interrupt.

    Other bit which is set is "False Carrier" : In ethernet phy, every frame starts with SSD bit pattern, if phy observes that pattern is not correct, it signal false carrier.

    Regards,
    Geet