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TCA9539-Q1: How TCA9539QPWRQ1 handles interrupt signals?

Daoyan Zhao
Expert 3555 points
Part Number: TCA9539-Q1

Tool/software:

Hi Expert,

May I ask

1. How TCA9539QPWRQ1 handles interrupt signals when receive them, regardless of whether they are level triggered or pulse triggered?

2. How TCA9539QPWRQ1 handles when it is edge triggered? Will it be latched? Or will the interrupt be lost?

My customer is using it and need your help confirming them, thanks a lot!

BR,

Daoyan

  • 0
    TI__Intellectual 1150 points

    Hello

    The team is currently on Thanksgiving holidays. Pls expect response delay till Dec-2nd. Thank you for your patience.

    BR

    -Yuan

  • +1
    Guru 316690 points

    The interrupt reporting is level triggered. Each input pin has one bit of memory that stores the value of the pin when it was last read by the I²C master. The interrupt output is active when, for any pin, the stored value is different from the pin's current value. (When the voltage at the input pin changes multiple times before the input port register is read, then the interrupt signal can toggle on and off repeatedly.)