power consumption problem

[air]

Hi,

I'm using nrf51822 / sd130 / sdk 12.1. I am doing minimizing current consumption. My main function is like below. I checked no wakeup in sleep mode. But, current consumption changes variously. It is wide from ~30uA to 1.5mA. What should I do additionally? I'm trying various condition.

thanks.

---

while (1)
{
        // fucntion execute


	NRF_CLOCK->TASKS_HFCLKSTART = 0;       // for test
	NRF_CLOCK->TASKS_HFCLKSTOP = 1;        // for test

	NRF_POWER->TASKS_LOWPWR = 1;           // for test
//	NRF_POWER->SYSTEMOFF = 1;              // for test

	// Make sure any pending events are cleared
	__SEV();
	__WFE();
	// Enter System ON sleep mode
	__WFE();

         // watchdog
	nrf_drv_wdt_channel_feed(m_channel_id);	// wdt feed

	NRF_CLOCK->TASKS_HFCLKSTOP = 0;        // for test
	NRF_CLOCK->TASKS_HFCLKSTART = 1;       // for test
   }

---

watchdog setting

// <1=> Run in SLEEP, Pause in HALT 
// <8=> Pause in SLEEP, Run in HALT 
// <9=> Run in SLEEP and HALT 
// <0=> Pause in SLEEP and HALT 

    #ifndef WDT_CONFIG_BEHAVIOUR
    #define WDT_CONFIG_BEHAVIOUR 8					// 8, mtkim modified, 1 : original
    #endif

[Sigurd]

We have a current consumption guide for the nRF51 here you can take a look at. You are completely turning off the TWI, PWM and ADC before going to sleep ? Are you using BLE ? How long are you sleeping before you wake-up again?