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SN65DP159: I2C operation during used in pin strap mode

Kawai
Guru 19785 points
Part Number: SN65DP159

Hello Team,

Please allow me to ask you about the I2C bus function during I2C_EN pin = Low.

Customer is using in PIN STRAP MODE, however, they have I2C bus connected to the device and also have I2C slave device which has same address with DP159.

If I2C_EN = Low, I believe I2C function is disabled and the device will NEVER respond (ACK) to the I2C communication. Is my recognition correct ?

If there is any exception, please let us know.

Best Regards,

Kawai

  • 0
    TI__Mastermind 23815 points
    Hi Kawai-san,

    The I2C interface is enabled all the time, when I2C_EN = Low, you can access I2C registers but the configuration will be taken from the pins.
    Changes to other registers that have no pin option will modify the behavior of DP159.
    The customer will have to set different addresses for these devices.

    Regards
  • 0 in reply to Moises Garcia
    Guru 19785 points
    Hi Moises-san,

    Thank you for the information.

    I understood that I2C_EN pin is not enabling/disabling the I2C function.
    It is a "Pin setting override (Low Active)" function.

    I will ask them to change the I2C address or disconnect the I2C bus.

    Best Regards,
    Kawai