RE: NRF_GPIO_PIN_NOPULL keeps giving high to the PIN

Håkon Alseth — Mon, 20 Sep 2021 06:55:16 GMT

Hi,

The GPIO is floating when you do not have any pull-resistor (internally or externally). You will then sample either 0 or 1, based on the noise in your design, on that specific pin.

[quote user=""]need to add a pull-up or pull-down register.[/quote]

You should always have your pins set to a defined level, or set to "disconnected" in the NRF_GPIO->PIN_CNF[] field INPUT.

floating inputs can lead to a undefined voltage level on the input, and thus cause excessive current consumption in sleep.

Kind regards,

Håkon

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RE: NRF_GPIO_PIN_NOPULL keeps giving high to the PIN