• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 33 subscribers
  • Views 146 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TCA9534A: TCA9534A with TMAG5273

puppala naresh
Prodigy 100 points
Part Number: TCA9534A
Other Parts Discussed in Thread: TMAG5273, , TCA9543A

Tool/software:

Hello,
I am using the TMAG5273 Hall sensor and the 8-channel TCA9534A GPIO expander.

I connected the Hall sensor's interrupt pin to a GPIO pin on the GPIO expander, and I connected two switches to other GPIO pins. The GPIO expander's interrupt pin is connected to the microcontroller's interrupt pin.

During testing, I observed that the GPIO expander's interrupt pin is generating false interrupts or fluctuations.

Note: The Hall sensor is connected to I2C1, and the GPIO expander is connected to I2C2.

What could be the reason for these false interrupts or fluctuations?



  • 0
    TI__Mastermind 48228 points

    Hi Puppala,

    The schematic does not allow me to zoom in to review the connections. Can you try a different file type? 

    Are there any pins configured to INPUT and left floating on the TCA9543A? It could be that these floating pins are triggering a false interrupt. 

    Any oscilloscope captures to show the problem you are running into? 

    Regards,

    Tyler