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TMS320F28379D: Flowting GPIOs

HS FAE Germany
Mastermind 32240 points
Part Number: TMS320F28379D

Hello,
customer has open GPIOs in his design which are set to input. Is this allowed? Can this have an influence on the ADC measurement?

Regards, Holger

  • 0
    TI__Mastermind 42195 points

    Holger,

    there are 3 acceptable configurations for unused GPIOs.

    1. Input mode with internal pullup enabled
    2. Input mode with external pullup or pulldown resistor
    3. Output mode with internal pullup disabled

    As long as the unused GPIO is at a steady state and not "wiggling" then it will not affect the ADC measurement.

    Regards,
    Cody