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nRF52833, about GPIO default states in System Off mode

natahan

Hi There,

Are the GPIO levels high impedance when the system is in off mode? Can you give information about their status? For example, one pin of the device is configured as pull-down. If the system is put into System Off mode from deep sleep modes, will the configured pin go into high impedance state? or will there be a change in the set pin configuration?

Thanks.

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    Hello Vidar,

    what about in the case where the MCU is completely disconnected from POWER? my MCU is powered through a load switch and control when to enable it is based on external peripherals logic. The MCU is connected to external peripherals that are ALWAYS powered ON and I am seeing what I think is leakage back into the MCU as I am measuring approx. 0.3V on the MCU coupling caps when its powered OFF. the MCU is connected to external IMU, Memory, low power Accelerometers, and Hall sensors. All these external peripherals are connected via SPIM buses. Again, some of these are ALWAYS powered ON and some are only ON while the MCU is ON. the peripherals that are NOT always ON are also controlled via a load switch. I need to make sure the enable pin on the load switches of those peripherals that are disabled when the MCU is powered down are NOT floating. I do not want to use an external pull-down resistor as that would dramatically increase my power consumption when operating that sensor. your help will be greatly appreciated. 

    Regards,

    Wael

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  • 0

    Hello Vidar,

    what about in the case where the MCU is completely disconnected from POWER? my MCU is powered through a load switch and control when to enable it is based on external peripherals logic. The MCU is connected to external peripherals that are ALWAYS powered ON and I am seeing what I think is leakage back into the MCU as I am measuring approx. 0.3V on the MCU coupling caps when its powered OFF. the MCU is connected to external IMU, Memory, low power Accelerometers, and Hall sensors. All these external peripherals are connected via SPIM buses. Again, some of these are ALWAYS powered ON and some are only ON while the MCU is ON. the peripherals that are NOT always ON are also controlled via a load switch. I need to make sure the enable pin on the load switches of those peripherals that are disabled when the MCU is powered down are NOT floating. I do not want to use an external pull-down resistor as that would dramatically increase my power consumption when operating that sensor. your help will be greatly appreciated. 

    Regards,

    Wael

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