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DS280BR810: Default Configuration

Michael Nycz
Intellectual 835 points
Part Number: DS280BR810

When I power up the DS280BR810, does it come up in some default mode or do I need to configure the part in order for it to pass data? What I would like to do initially is bring the part up in a "pass through" state or as close to a pass through state as possible. If anyone can help with this or point me to the appropriate documentation that would be greatly appreciated.

Thank you,

Mike Nycz

  • 0
    TI__Mastermind 24182 points

    Hi Mike,

    By default, the redriver will be in a state where it can pass data.

    In order to put the redriver into a state most similar to pass through, I'd recommend setting CTLE boost stage 2 to 0 and enabling the bypass for CTLE  boost stage 1.  Depending on the application, you might also consider increasing or decreasing the CTLE bandwidth.

    Information on how to set CTLE boost, bypass, and bandwidth can be found in the device programming guide.  This is in the "my secure resources" folder, "DS280BR810-DESIGN".  It looks like you already have access to this, but please let us know if you have troubles accessing this.

    Would it be possible to share more information about your use case for DS280BR810?  You're welcome to send me a private message on E2E if the information is not suitable for the forum.

    Thanks,

    Drew

  • 0 in reply to Drew Miller1
    Intellectual 835 points

    Drew, 

             Thank you for the response. In looking in the datasheet for the DS280... It mentions in table 8 in the programming guide 100Gbe CAUI-4 mode and 40Gbe nPPI mode. Are these the only modes supported for the 100G and 40G? So if I have a PHY connected to the DS280.. Does the PHY need to be in the same mode as the DS280... in order for the two to pass data?

    Thank you,

    Mike

  • 0 in reply to Michael Nycz
    TI__Mastermind 24182 points

    Hi Mike,

    Please keep in mind that this is an analog linear device.  I would not get too closely tied to viewing these as protocol specific modes.  The step configuring for 100 GbE CAUI-4 or 40 GbE nPPI is just adjusting the broadband gain of the device based on the specification requirements for 100 GbE CAUI-4 and 40 GbE nPPI output voltage amplitude (VOD).

    Other protocols are supported by this device.  The DS280BR810 output should be tuned to match whatever specification you are trying to meet.

    Thanks,

    Drew

  • 0 in reply to Drew Miller1
    Intellectual 835 points

    One more question... There is a signal detect. Will that detect any signal as long as the signal makes the thresholds? 

  • 0 in reply to Michael Nycz
    TI__Mastermind 24182 points

    Hi Mike,

    Yes this is correct.  Signal detect is used to disable functional blocks within the redriver (such as TX driver) when no input is detected.

    Thanks,

    Drew