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DS250DF810: some quesitons about the EQ setting in DS250DF810

Oliver Ou
Intellectual 2845 points
Part Number: DS250DF810


Hi Team,

Customer has some quesitons about the EQ setting during optimizing the performance of DS250DF810.  

1.How to disable TX EQ function?

2.How to disable RX EQ function and check RX EQ value?

3.Could you have any suggestion to this special value in RX EQ aimed at 1m and 3m DAC cable

Could you give some comments?

Thanks a lot.

  • 0
    TI__Mastermind 19235 points

    Hi Oliver,

    1. The Tx FIR EQ may be disabled by setting 0x3D[7]=0
    2. The Rx EQ cannot be disabled. The user may instead force a CTLE boost setting of 0x00, the lowest boost value
    3. Refer to the programming guide "Common Device Configurations" front port ingress case Section 4.3. This example applies to your application case

    Table. Set CTLE Boost to 0

    STEP

    SHARED/ CHANNEL REGISTER SET

    OPERATION

    REGISTER ADDRESS [HEX]

    REGISTER VALUE [HEX]

    WRITE MASK [HEX]

    COMMENT

    1

    Channel

    Write

    2D

    08

    08

    Enable CTLE boost override

    2

    Channel

    Write

    03

    00

    FF

    Set CTLE boost to 0x00. Different input channel loss will require different CTLE settings.