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Original question:

AM6442: RGMII signal drive strength

DP83867IR: Loading on the TX_D0 & TX_D1 is higher than TX_CLK, TX_D2 & TX_D3

VK
Intellectual 596 points

Part Number: DP83867IR

Tool/software:

Hi TI EPHY Team, 

In below e2e link, https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1374411/am6442-rgmii-signal-drive-strength/5255385#5255385

We are in connect with processor team and observed loading on the TX_D0 & TX_D1 is higher than TX_CLK, TX_D2 & TX_D3.

1) Can you please confirm loding of TX_D0 & TX_D1 is higher than TX_CLK, TX_D2 & TX_D3 or not?

2) Can you please confirm, is it possible pin capacitance of TX_D0 & TX_D1 may go higher than 5pF?

3) Can you please check and confirm, Input buffer used for TX_D0 & TX_D1 is same as TX_CLK, TX_D2 & TX_D3 or not?

-

Best Regards,

Vaibhav 

  • 0
    TI__Mastermind 44955 points

    Hello,

    We are looking into this at the moment; please expect an update by end of week at latest.

    Sincerely,

    Gerome

  • 0 in reply to Gerome Cacho
    Intellectual 596 points

    Dear TI Team, 

    Below is additional question i have, Could you help me to get below information? this help me to understand this my test observation & issue. 

    -> How TI confirm input high/low current will not go above the limit specified in datasheet of DP83867IRRGZ ? Production test or design? 

    -> How TI confirm input capacitance not go above the limit specified in the datasheet of DP83867IRRGZ ? Production test or design? 

    -

    Vaibhav

  • 0 in reply to VK
    TI__Mastermind 44955 points

    Hi Vaibhav,

    I am working with Sreenivasa in your connected thread and in efforts to consolidate conversation, will look to continue debug through that thread.

    Regarding your new question, I cannot reveal that data as test methodology is proprietary information to TI.

    Sincerely,

    Gerome

  • 0 in reply to Gerome Cacho
    Intellectual 596 points

    Dear Gerome,

    If you not share the data then how we can trust on the reliability of DP83867IRRGZ? if you have any concern on the sharing data on the e2e platform then you can provide me data on my email. 

    -

    Vaibhav

  • 0 in reply to VK
    TI__Mastermind 44955 points

    HI Vaibhav,

    Unfortunately, we cannot reveal this information on our proprietary methodology for specifications of our devices. If you see that your design is not meeting these specifications, then we can have a further conversation as to why that is the case.

    Sincerely,

    Gerome

  • 0 in reply to Gerome Cacho
    Intellectual 596 points

    Dear Gerome,

    Gerome Cacho said:
    If you see that your design is not meeting these specifications, then we can have a further conversation as to why that is the case.

    Relay we don't request such an information if our design meet the datasheet specification, but this is not the case for now.

    Can you please give a specific timeline, by when you (TI) will able to resolve the problem/provide the solution?

    -

    Vaibhav

  • 0 in reply to VK
    TI__Mastermind 44955 points

    Hi Vaibhav,

    I cannot comment on a specific timeline as the debug is still ongoing, but I can provide a next check-in update of next Monday. US offices will be going on Holiday on Thursday, with some extending into the long weekend.

    Again, for consolidation purposes, we will look to continue on the aforementioned thread.

    Sincerely,

    Gerome

  • 0 in reply to Gerome Cacho
    TI__Mastermind 44955 points

    Hi Vaibhav,

    As an update, we are currently in efforts to validate this data with some boards in lab, and take that analysis to our internal team for interpretation of results. I will look to update on the AM6442 thread moving forward in efforts of consolidation.

    Sincerely,

    Gerome