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TCA9548A: Missing clock pulse

Raghav Maheshwari
Prodigy 10 points
Part Number: TCA9548A
Other Parts Discussed in Thread: TMDXIDK5718,

Hello All,

While trying to establish I2C communication with multiple channel using the MUX. One observation was that the bus gets held by different channels of the IC. This happens because the clock pulse to stop a successful transaction is itself not generated. Attached waveform for reference. I am using the I2C library for TI RTOS. the communication protocol is being run on TMDXIDK5718

Please advise

  • +1
    Guru 317150 points

    The TCA9548A is not a master device and does not use clock stretching, so it never holds the clock signal.

    The master device (whatever it is) has deciced not to output clock pulses. There is not enough information to determine why. If I had to guess, I'd say it might be a software problem.