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TCA9544A: TCA9544A

syam kandelli
Prodigy 110 points
Part Number: TCA9544A

Tool/software:

Hi,

my name is Shyam  from India.


I am using a tca9544a mux, I have three mux's on my board, one of them fails to start when I restart the board.

The address of the three mux's is different.
 

thankS,

SHYAM

  • 0
    TI__Genius 17040 points

    Hello Shyam,

    I have a couple of questions here.

    1. when you say restart the board do you mean you are powering the board off and then back on?

    2.Can you send over the address of all 3 of the TCA devices and a scope shot of the SDA/SCL lines during the failure?

    3.Can you also send over a block diagram of your design?

    Regards,

    Kameron

  • 0 in reply to Kameron Hill
    Prodigy 110 points

    mux address
    mux _ 1 E0

    mux_2 E2

    MUX_3 EE

  • 0 in reply to syam kandelli
    TI__Genius 17040 points

    Hello SHYAM,

    So thank you for the schematic pictures.

    I have some follow up questions that i need your help with to understand the problem.

    1. Can you describe the failure you are seeing? For example is the device that is failing not turning back on after you repower the board. Can you measure the voltage at the supplies of all 3 devices when the "failure" happens? Please be sure that all devices are properly powered after the board restart

    2.Which specific device is not working out of the 3 you showed me? Tell me that devices address

    3. Are you getting ACK or NACK bits from the 3 devices. Can you tell me which ones are give you ACK or NACK?

    4.Can you please send over i2c waveforms/ scope shots of the communication to all three devices? SDA and SCL lines

    Regards,

    Kameron