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DP83867IR: About IEEE1588 of DP

Ozawa
Intellectual 850 points
Part Number: DP83867IR


Hi

My customers are considering DP83867IR.

Please teach me four questions.

①

[The DP83867 support IEEE 1588 SFD]

Does this mean that there is a function that "time stamp can be added by hardware when sending packets?"

Are there any other functions as well?
→ Is there anything different from clock-related non-compliant products?
→ Is there anything different from I / F related non-compliant products?
→ Is there a function installed on the packet receiving side in relation to IEEE 1588?

②

I understand that the accuracy of time synchronization differs depending on whether IEEE 1588 (or IEEE 802.1 AS) is supported by hardware.

Specifically, how much time synchronization accuracy differs?
Do you have any comparison materials?

③

Is there a function that must be handled not only by PHY but by the MAC side?

Is there a function that must be handled not only by PHY but by the MAC side?

If it does not correspond on the MAC side, only PHY and driver software correspond,
Can I support IEEE 1588 (or IEEE 802.1AS)?

④

What specific functions must be handled by the driver?
What kind of software is required?

Best regards,

Ozawa

  • 0
    TI__Mastermind 18425 points
    Hello Ozawa,

    Please find my response below,

    1. SFD indicator can be routed to a GPIO on the DP83867. The MAC can use this GPIO as an interrupt to time stamp packets. The hardware in this case refers to the MAC and not the PHY.

    2. Unfortunately we do not have comparison data between SFD and hardware time stamp at this time.

    3 and 4. Yes, the MAC should have the ability to monitor the GPIO pin of the DP83867 for SFD interrupt. The MAC will have to use the SFD to timestamp the packets. The timestamp portion of the driver will need to be implemented on the MAC side.

    -Regards,
    Aniruddha