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Protecting the slave from back power.

Chandrashekhar D R
Prodigy 10 points

I am connecting a slave through PCIe for a master. Master will give power to slave only after its complete configuration. How to protect the slave from Back power caused by I2C pull-up resistors mounted at master side? Please help me.

  • 0
    TI__Guru 64326 points
    Chandrashekhar,

    If your slave is being back powered by the I2C pull-up resistors I would recommend bring up the I2C supply voltage after "complete configuration". (This is the complete configuration of the master, correct?) How did you confirm that the slave is being back powered from the SDA and SCL lines?
  • 0 in reply to Malik Barton57
    TI__Guru 64326 points
    Chandrashekhar,

    Is there any more support needed for this issue? If so please reply with any relevant details so that I can further assist you. For now I will be marking this thread as "TI Thinks Resolved". If you have resolved your issue, please post the solution to the original problem/post for others with similar issues.