• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 33 subscribers
  • Views 602 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DS125DF410 / recommended register setting for 6.25Gbps

Toshiyuki
Mastermind 7075 points

Other Parts Discussed in Thread: DS125DF410

Hi,

Customer is considering DS125DF410 for 6.25Gpbs line. Please let me know how to set 0x60,61,62,63 and so on.

Best Regards,

Kato

  • 0
    TI__Mastermind 19235 points

    　

    STANDARDS

    DATA RATES (Gb/s)

    VCO FREQUENCIES (GHz)

    DIVIDER RATIOS

    REGISTER 0x2F VALUE (hex)

    InfiniBand

    2.5, 5, 10

    10.0

    1, 2, 4

    0x26

    CPRI1

    2.4576, 4.9152, 9.8304

    9.8304

    1, 2, 4

    0x36

    CPRI2

    3.072, 6.144

    12.288

    2, 4

    0x46

    PROP3

    6.25

    12.5

    2

    0xA6

    Interlaken1

    3.125, 6.25

    12.5

    2, 4

    0xB6

    Interlaken2

    10.3125

    10.3125

    1

    0xC6

    Ethernet

    1.25, 10.3125

    10.0, 10.3125

    1, 8

    0xF6

    Hi Kato-san. I've included above the DS125DF410 standard rate table from the datasheet. As per above there are two channel register 0x2F settings covering 6.25Gbps, so customer should not need to set 0x60-0x64.

    Regards,

    Rodrigo Natal

    DPS Applications Engineer

  • 0 in reply to Rodrigo Natal
    Mastermind 7075 points

    Hi Rodrigo - san,

    Thank you for the reply. I compiled 6.25Gbps configuration sequence as follows. Is my understanding correct ?

    Step

    Shared/Channel Register Set

    Operation

    Register Address (HEX)

    Register Default Value (HEX)

    write value (HEX)

    Comment

    1

    Share

    Write

    FF

    00

    0C

    Write all channels

    2

    Channel

    Write

    0A

    10

    1C

    Assert CDR reset

    3

    Channel

    Write

    2F

    06

    A6

    Select 6.25Gbps

    4

    Channel

    Write

    31

    20

    20

    Set Adapt Mode 1

    5

    Channel

    Write

    1E

    E9

    E9

    Disable the DFE since most application do not need it

    6

    Channel

    Write

    15

    10

    1x

    Set DEM value

    7

    Channel

    Write

    2D

    80

    8x

    Set VOD value

    8

    Channel

    Write

    0A

    10

    18

    Release CDR reset

    Best Regards,

    Kato

  • 0 in reply to Toshiyuki
    TI__Mastermind 19235 points

    To release CDR Reset you would write 0x10. Otherwsie looks good.

    -Rodrigo