GPIOTE current consumption in nrf52840

RE: GPIOTE current consumption in nrf52840

run_ar — Wed, 05 Aug 2020 14:07:01 GMT

Hi,

Please register a new question with your inquiry. Regardless I don't think I would configure the pin with pull down, as I would expect the external unit to control the pin..

RE: GPIOTE current consumption in nrf52840

SebastianA — Wed, 05 Aug 2020 07:43:15 GMT

We see an increased power consumption at around 26uA when enabling GPIOTE IN events in our application with a NRF52840_xxAA_REV1 chip.

We use nRF5_SDK_15.2.0_9412b96 and the following code:

    // reg is NRF_P1, pin is 13
    reg->PIN_CNF[pin] &= ~(GPIO_PIN_CNF_DIR_Msk | GPIO_PIN_CNF_INPUT_Msk);
    reg->PIN_CNF[pin] |=
        (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos)
        | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos);

    reg->PIN_CNF[pin] &= ~GPIO_PIN_CNF_PULL_Msk;
    reg->PIN_CNF[pin] |= GPIO_PIN_CNF_PULL_Pulldown << GPIO_PIN_CNF_PULL_Pos;

    // slot is 0, portpin is 0x0100 + 13
    nrf_gpiote_te_default(slot);

    nrf_gpiote_event_configure(slot, portpin, NRF_GPIOTE_POLARITY_LOTOHI);

    NRF_GPIOTE->EVENTS_IN[slot] = 0;
    nrf_gpiote_event_enable(slot);
    nrf_gpiote_int_enable(1 << slot);

With this code our application use around 32uA. After removing the call to nrf_gpiote_event_enable, it uses around 5uA. Looking at the graph, I see that it is the baseline that is increased.

During the measurement we don't trigger the pin and the interrupt isn't called.

I've also tried the same thing on port P0.11 with the same result.

Is this an expected power increase?

RE: GPIOTE current consumption in nrf52840

run_ar — Tue, 12 Feb 2019 11:51:29 GMT

Unfortunately, we still have not prioritized to measure these numbers. But as already stated I expect these to be comparable to the nRF52832 GPIOTE current consumption numbers.

RE: GPIOTE current consumption in nrf52840

Anantha Keshava — Mon, 11 Feb 2019 23:12:48 GMT

Hi run_ar,

Were you able to get to these numbers? If so would highly appreciate getting these numbers.

Thanks in advance.

Regards,

Ananth

RE: GPIOTE current consumption in nrf52840

run_ar — Thu, 26 Apr 2018 07:06:24 GMT

Hi Mahendra,

As you have seen some power consumption numbers are missing. This is something we are working on, but the GPIOTE numbers has not been prioritized yet. I would expect it to be similar to the nRF52832 as the IP is similar, except errata 89 was fixed on nRF52840. However I cannot give any promises before this is put in the PS. I am sorry for the inconvenience.