current consumption of the radio Module in sleep mode

[MeisterBob]

Hello,

I am developing an IEEE802.15.4 Beacon with the nRF52840-DK, SDK 16 and the nRF-IEEE-802.15.4-radio-driver. My problem is that the consumes ~400uA of current in sleep mode, deiniting the driver doesn't make a difference. With Radio disabled the DK uses ~10uA with a 400uA spike every 28ms.

Can you please help me with reducing the current consumption?

Thanks

#include "sdk_config.h"
#include "nrf.h"
#include "nrf_pwr_mgmt.h"
#include <nrf_802154.h>

#define PWR_DCDC  1
#define PWR_RADIO 1
#define PWR_SLEEP 1

int main(void) {
#if PWR_DCDC
    NRF_POWER->DCDCEN  = 1;
    NRF_POWER->DCDCEN0 = 1;
#endif
#if PWR_SLEEP
    nrf_pwr_mgmt_init();
#endif
#if PWR_RADIO
        nrf_802154_init();
        nrf_802154_sleep();
        //nrf_802154_deinit();
#endif
    while(1) {
#if PWR_SLEEP
        nrf_pwr_mgmt_run();
#endif
    }
}

[MeisterBob]

I changed the Makefile to use nrf_802154_clock_sdk.c instead of nrf_802154_clock_nodrv.c then nrf_drv_clock_uninit() is called, but the current is stil at ~430uA.

[Simonr]

Hi

And does the nrf_drv_clock_uninit() function call the nrfx_clock_disable(); & nrfx_clock_uninit(); functions. I see that the nrf_drv_clock_uninit() functions isn't actually defines in the 802.15.4 driver itself, so this will have to be integrated from the SDK.

Best regards,

Simon

[MeisterBob]

nrf_802154_deinit() [driver/.../nrf_802154.h] calls nrf_802154_clock_deinit() [driver/.../nrf_802154_clock_sdk.c] which calls nrf_drv_clock_uninit() [sdk/.../nrf_drv_clock.c]

I attach my actual Makfile where I removed all unnecessary src files and include paths.

8231.Makefile.zip

[MeisterBob]

Hi Simon,

because trying to  stop the hf clock didn't seem to lead to something I startes looking from the other side. I investigated nrf_802154_init() and found that the current rises after NRF_RNG->TASKS_START=1 in nrf_802154_random_init(). So now I call NRF_RNG->TASK_STOP=1 after sending the radio to sleep and everything seems to be fine.

[Simonr]

Hi

Nice catch! I didn't realize that this was used in the 802.15.4 driver at all, and it seems like the driver doesn't actually stop it when going to sleep at all. Great job!

Best regards,

Simon