How to control no-used GPIO(NC) pins to save current consumption?

[Roger01]

Hi.

I'm using nRF52832.

There are some NC pins in my schematics.

How to control them to save current consumption?

Making them output and low is the best solution?

[jacksong]

you can use nrf_gpio_cfg_default(x) to set NC-pin with input and disconnect.

__STATIC_INLINE void nrf_gpio_cfg_default(uint32_t pin_number)
{
    nrf_gpio_cfg(
        pin_number,
        NRF_GPIO_PIN_DIR_INPUT,
        NRF_GPIO_PIN_INPUT_DISCONNECT,
        NRF_GPIO_PIN_NOPULL,
        NRF_GPIO_PIN_S0S1,
        NRF_GPIO_PIN_NOSENSE);
}

[Roger01]

Hi Jacksong. thank you very much for your reply.

What if I don't set GPIO for NC-pins, does it make current leakage?

[jacksong]

Hi

Actualy, after reset , GPIO default state is that config. I'm not sure what will happen , and in my project, i set all of  GPIOs with default config at hardware init, and works well