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TCA9548A: Programming TCA9548A issue: Whether can we program I2C by SC0..SC7?

Thomas Chang15933
Expert 4770 points
Part Number: TCA9548A

Dear Team:

Programming TCA9548A  issue:  Whether can we  program I2C by I2C BUS0..I2C BUS7?

Another questions: Input I2C bus (pin22,23) don't turn on, whether another  I2C BUS0..I2C BUS7 can switching turn on to Pin22,23 I2C?

  • 0
    TI__Guru 72711 points

    Hello Thomas,

    "Programming TCA9548A  issue:  Whether can we  program I2C by I2C BUS0..I2C BUS7?"

    -You can only program the device when it turns on by the main SDA/SCL pins. After you enable a channels, you could program the switch from the enabled channels but you could also disable the channel you are writing on...... I would recommend you always communicate to the device from the main channel.

    "Another questions: Input I2C bus (pin22,23) don't turn on"

    I don't understand. This is the main channel to the switch, all signals come of go through this channel. You have to program the device from this channel after you turn on the device.

    -Bobby