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Original question:

SN75LVCP601: M.2 SATA redriver will not connect

SN75LVCP601: New try

Peter Hendriks1
Prodigy 70 points
Part Number: SN75LVCP601

Lee,

We redesigned the board with more length on the connections from the DC blocking caps to the chip and added switches for the settings.

We tried it again without any luck.

We mounted the new re-driver board in a M.2 carrier board with a SATA input.

We then connected the SATA port from the NUC to the carrier board and our drive with the long cable to the SATA output on my re-driver board.

It now connects just fine. This leads us to believe that there is an issue with the proximity of the re-driver chip to whatever SATA driver there is on the NUC.

Any ideas?

  • 0
    TI__Guru** 114590 points

    can you draw a block diagram or jut picture of your new setup?

  • 0
    TI__Mastermind 43795 points

    There could be some signal interaction if the SN75LVCP601 is mounted very close to a SATA driver.  Can you send a picture of the system with the redriver board connected?

    The solutions are:

    1. Set the minimum EQ on the SN75LVCP601 input connected to the NUC.

    2. Set the driver equalization on the NUC to 0dB. 

    Regards,

    Lee

  • 0 in reply to Lee Sledjeski
    TI__Mastermind 43795 points

    Hi,

    Have you been able to work on the suggestions and take a picture of the system?

    Regards,

    Lee

  • 0 in reply to Lee Sledjeski
    Prodigy 70 points

    Lee,

    Sorry about the slow response.

    We tried all possible switch settings without any luck.

    We mounted our M.2 card in an external SATA to M.2 carrier and connected that to the SATA port of our NUC and the long cable with the driveon the SATA connector from our M.2 board and things worked fine.

    Somehow the proximity of the redriver chip to the SATA driver on the NUC seems to be problem.

    We re-designed the M.2 board to just supply the power from this slot and mounted a SATA connector to the driver side of the redriver.

    We received those boards this morning and we mounted the board in the M.2 slot and hooked a short SATA cable from the NUC SATA port to the SATA connector on our board and things work.

    Still don't understand what caused the issue, but we have a working concept now.

  • 0 in reply to Peter Hendriks1
    TI__Mastermind 43795 points

    Hi Peter,

    Thanks for the update, let us know if there are additional questions.

    Regards,

    Lee