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DP83TD510E: DP83TD510E

Viktor Steiner
Prodigy 20 points
Part Number: DP83TD510E


We plan to realize a real time motor- and elevator control on the basis of a point-to-point 10Base-T1L 10M Single Pair Ethernet communication.The line termination on each end is a PHY and a MCU.

But we need the following timing specifications:
Data cycle time: = 62,5µs or less.
Data jitter: < 100ns

Is this feasible or have you even made real time tests with your PHYs?

Is there a reference design available?

  • 0
    TI__Mastermind 40245 points

    Hello,

    Thank you for your query. I am out of office and will look at this thread upon my return tomorrow, 9/7/22.

    Sincerely,

    Gerome

  • 0 in reply to Gerome Cacho
    TI__Mastermind 40245 points

    Hello,

    Jitter is located in electrical specifications; where max jitter is 40ps for 25MHz or 650ps for 50MHz communications. For data cycle time, 62.5us is equal to 16kHz, which is slower than what our PHY can run at; 10MHz. This should fit your application. There is an EVM for this PHY located in the product page.

    Sincerely,

    Gerome

  • 0 in reply to Gerome Cacho
    Prodigy 20 points

    Hello,

    I suppose, that the jitter indicated above is only for the PHY and not for the whole point to point transmission line including both PHYs, MCUs and the cable. Since, if there is no counter measure taken, the resulting jitter is +/-100ns with 10 MHz, isn't it?
    So a precise synchrinized timing base is at least necessary on both ends of the line.
    I don't know if the use of TSN is necessary in this case.

    So my question is, if the jitter could be less than 100ns for a whole transmission line based on 10Base-T1L 10M Single Pair Ethernet and if 10MHz is anough or if I have to switch over to 100MHz.
    Is there a reference design for such a transmission line or has there been some laboratory measurements done with appropriate results for jitter etc.?

  • 0 in reply to Viktor Steiner
    TI__Mastermind 40245 points

    Hello,

    Could you please try and take measurements using our EVM to see if these meet your criteria?

    Sincerely,

    Gerome