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[FAQ] F29x GPIO: Frequently Asked Questions

Andrew Poirier
Prodigy 260 points
Part Number: F29H859TU-Q1

Tool/software:

Where can I find answers to frequently asked questions related to using GPIO on F29x devices?

  • 0
    TI__Prodigy 260 points

    For reference, please see F29x General FAQ for other IP/peripherals

    F29x GPIO Frequently Asked Questions

    Under what conditions might the IO pins enter a high-impedance state?

    • See Table 3-1 in the F29x Technical Reference Manual

    Is it possible to write to GPIO CTRL registers?

    • While any CPU can control GPIO operation, only CPU1 can write to GPIO CTRL registers (CPU2/3 have read access only).

    Is there a possibility to disable certain GPIO pins (set them to high impedance) by an external signal?

    • There is no method to directly trip GPIO pins in hardware, similar to ePWM module's using trip zone. You would need to generate an interrupt based on external trigger and set the pins to defined state as needed using software.