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DS125DF111: DS125DF111 Loopback setting

ByungJun kim
Prodigy 10 points
Part Number: DS125DF111

If I change the value of register 0x07 : 0x03'h in the control/shared register set, I think it will work as loopback. Is that right?

0xff    0x00    Select control/shared Register

0x07   0x03    input A --> Output B and input B --> output A

I want to set it up as above.
Even if both port A and port B are looped back and the bypass mode is executed, it does not loop back.

Can the DS125DF111 operate as shown in the picture above?
What settings should I set if I can?

  • 0
    TI__Mastermind 23725 points

    Hi,

    That's correct, writing shared register 0x07=0x03 should loopback INA --> OUTB and INB --> OUTA.

    ByungJun kim said:
    Even if both port A and port B are looped back and the bypass mode is executed, it does not loop back.

    Can you confirm the ENSMB pin is pulled high for SMBus slave mode? Can you share your full register write sequence?

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    Prodigy 10 points

    Thank you very much for your response.

    The SMBUS is connected to High.
    I'm using it in slave mode.

    It was confirmed that the bypass mode operation operates normally.

    I'm trying to use both channel A and channel B as Loopback, but it doesn't work.

    Register
    Address    		 Write
    Value
    FF 00
    07 03
    FF 0C
    09 00
    1E 08
    2D 88
    03 00
    0A IC
    WATE 1 SEC
    0A 10
  • 0 in reply to Lucas Wolter
    Prodigy 10 points

    I solved the problem.

    The link was not connected due to a polarity problem.

    Changed the polarity of dirver.
    This is how the problem was solved.

  • 0 in reply to ByungJun kim
    TI__Mastermind 23725 points

    Hi ByungJun,

    I'm glad you were able to resolve the issue! Thanks for following up and sharing your solution.

    Best,

    Lucas