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DS125DF111: Schematic Review Request.

Nicky Lim
Genius 3195 points

Part Number: DS125DF111

Hello,

Make a circuit as attached, but it cannot be linked 10G with default setting.

I2C read/write works well and tried  to set as datasheet page 29 &30, but not work.

Please review attached schematic and let me get the result.

And also let me know what I can set registers or values to make it work well.

Regards,

Nicky

  • 0
    TI__Mastermind 43795 points

    Hi Nicky,

    Pages 29 and 30 of the datasheet cover PRBS generation.  By default the DS125DF111 is designed to retime 12.288, 9.8304, 6.144, 4.9152, 3.072, 2.4576, 1.536, and 1.2288 Gbps. For receiving and retiming a 10.3125 Gbps signal I would program the following registers.

    0x60 = 90

    0x61 = B3

    0x62 = 90

    0x63 = B3

    0x64 = DD

    After programming the above registers to target 10.3125 Gbps, I would Reset/Reset Release the CDR to start the Lock process to 10.3125 Gbps

    0x0A = 1C

    0x0A = 10

    Regards,

    Lee