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DP83848C: Asking for how to generate the test pattern on DP83848

SHH
Mastermind 32126 points
Part Number: DP83848C
Other Parts Discussed in Thread: DP83848K

Hi Team,
Customer is evaluating the DP83848K.( the part numbe is 48k, not 48C) If customer would like to measure the 10BASE-T internet signal for the following waveform.
Whih registers need to set for the pattern?

Thansk,
SHH

  • 0
    TI__Mastermind 32126 points
    Hi team,
    Here are the customer setting. But it does not work.
    Please provide your comment for how to generate the pattern.

    #RX
    phy_ctrl write 0x19 0x4003
    phy_ctrl write 0x1A 0x0844
    phy_ctrl write 0x1B 0x0030


    #TX
    phy_ctrl write 0x19 0x0003
    phy_ctrl write 0x1A 0x0844
    phy_ctrl write 0x1B 0x0030



    Thanks,
    SHH
  • 0 in reply to SHH
    TI__Mastermind 23675 points
    Hi SHH,

    You should enable BIST and force a 10BASE-T link as well. Please change/add the following:

    Receive Path
    write 0x0100 to register 0x0 // force 10BASE-T
    write 0x4103 to register 0x19 // enable BIST and force MDIX
    write 0x0844 to register 0x1A // force 10BASE-T link

    Kind regards,
    Ross