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TCA9543A: Is it applicable to two masters and one slave?

Downey Kim
Expert 2675 points
Part Number: TCA9543A

Hi TI experts,

Like the block below, Is it applicable to two masters and one slave?

If the TCA9543A is not suitable, please recommend possible items.

Thanks.

Downey Kim.

  • 0
    TI__Mastermind 49270 points

    Hi Downey Kim,

    Our I2C switches don't have any kind of master arbitration feature. I don't see this kind of system working without some kind of software set up on both the CPUs. 

    Any alternative solution I can think of would involve additional software to both CPUs and would involve a normal MUX device with a selector pin.

    -Bobby

  • 0
    Guru 243910 points

    It is possible to have multiple masters on the same bus if all of them are multi master capable. (Almost all I²C hardware implementations allow this, but you must check the software.) In that case, a switch must not be used.