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DS110RT410 - Recommended register setting for 10GbE

Hiroaki Masumoto
Expert 1210 points
Other Parts Discussed in Thread: DS110RT410

Hello,

My customer is considering DS110RT410 for 10Gpbs Ethernet.
He has questions about DS110RT410.

[Q1]
Do you have a sample configuration examples of recommended register settings for 10 Gigabit Ethernet?
(About the address of register and the recommended setting that need for 10 Gigabit Ethernet )

[Q2]
The description of the address 0x64 of DS110RT410 data sheet (page 47), have been described as
"Must also program channel register 0x67[7]" and "Must also program channel register 0x67[6]".
However, the register 0x67 are reserved.
Is this the correct?

My custermer set bits 7:6 of register 0x67 to value of 2'b11.
But, value 2'b00 are readed from bits 7:6 of register 0x67.
Data sheet has been described as "RW".
Can this register (0x67) write and read?

Best regards,

Hiroaki Masumoto

  • 0
    TI__Mastermind 19135 points

    Q1

    The default DS110RT410 CDR rate/subrate configuration locks to 10GE and 1GE input signals. The following parameters can be adjusted depending on the retimer pre-channel and post-channel in your application

    Tx voltage output differential

    Tx de-emphasis (post-cursor EQ)

    Rx adapt mode

    You may refer to the DS110RT410 datasheet for info on what retimer channel registers allow you to configure these parameters

    Q2(a) - The description of the address 0x64 of DS110RT410 data sheet (page 47), have been described as  "Must also program channel register 0x67[7]" and "Must also program channel register 0x67[6]". However, the register 0x67 are reserved. Is this the correct?

    Yes.

    My custermer set bits 7:6 of register 0x67 to value of 2'b11.
    But, value 2'b00 are readed from bits 7:6 of register 0x67.
    Data sheet has been described as "RW".
    Can this register (0x67) write and read?

    Make sure the customer is selecting share registers via register 0xFF (see datasheet excerpt below.)

    FF

    7:4

    0

    RW

    N

    RESERVED

    3

    0

    RW

    N

    WRITE_ALL_CH

    Selects All Channels for Register Write. See Table 15.

    2

    0

    RW

    N

    EN_CH_SMB

    Enable Register Write to One or all Channels and Register

    Read from One Channel. See Table 15.

    1:0

    0

    RW

    N

    SEL_CH_SMB

    Selects Target Channel for Register Reads and Writes. See

    Table 15.

    Cordially,

    Rodrigo Natal

    DPS Applications Engineer

  • 0 in reply to Rodrigo Natal
    Expert 1210 points

    Rodrigo-san,

    Thank you for your reply.

    I understood your answer.
    I will tell them of the contents to the customer.

    The contents of Q2, I have additional questions to you.

    [Q]
    The description of the address 0x64 of DS110RT410 data sheet (page 47), have been described as
    "Must also program channel register 0x67[7]" and "Must also program channel register 0x67[6]".
     When setting register 0x64, is it always also necessary to set register 0x67[7:6]?

    Since I can not find the description of the set of register 0x67 in "7.4.4 Standards-Based Modes" 
    description of  the data sheet (16-page), I made this question.

    Best regards,

    Hiroaki Masumoto