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TCA9546APWR Testing with Total Phase Aardvark

Ali Tatari27
Prodigy 40 points
Other Parts Discussed in Thread: TCA9546A

Hi,

I am trying to test TCA9546 functionality on my board using total phase aardvark. I2C is from a processor which is multiplexed by TCA9546A . I am unable to test or change register settings with using Aardvark. what would be the procedure? Please help. 

  • 0
    TI__Expert 6430 points
    Hi, Could you please post reset signal waveform?Thanks
  • 0
    TI__Mastermind 30260 points

    Does the Aardvark have internal pull-up resistors on SDA and SCL?

    If so, what is their value?

    If not, then that is your problem, because I do not see any pull-up resistors on SDA/SCL in your schematic.

    Please provide us the data log from the Aardvark if you have checked the pull-up resistors and verified the values. 

    Make sure the slave address is shown somewhere.

    Also, please provide scope shots clearly displaying SDA and SCL for a full Read or Write command (9 bits for the Slave Address and ACK, and 9 bits for the data and ACK).