Sleep specific numbers for nRF52833

[venkatesh dyagala]

Hi Team,

We wanted to verify Sleep current numbers for nRF52833 SoC based custom development kit.

Is there any readily available firmware to verify these numbers?

Thanks,

venkatesh

[Stian Røed Hafskjold]

We don't have FW for all of the mentioned numbers.

the ble_app_pwr_profiler example starts out in system OFF mode (IOFF_RAMOFF_RESET) and after pushing button 1 the sleep current between the BLE events will equal the ION_RAMON_RTC.

Other than that the system ON idle current can be easily checked by just entering a __WFE() loop in main, without initializing anything. You can start with the peripheral/blinky example in the SDK

int main(void){
  for(;;){
    __WFE();
  }
}

Any specific numbers you are interested in?

[venkatesh dyagala]

Hi Stian,

Thanks for the information but we would like to know 

ION_RAMON_EVENT 

ION_RAMON_GPIOTE 

ION_RAMON_GPIOTEPORT 

What is the significance of wake on any event?

What is the symbol for system ON idle current in above attached screenshot?

Thanks,

venkatesh

[Stian Røed Hafskjold]

ION_RAMON_EVENT is the same as System ON idle. In system on idle the the WFE (Wait For Event) has been called, so the CPU is in IDLE mode, and waking on any event (interrupt).

This will give you the ION_RAMON_EVENT current:

int main(void){
  for(;;){
    __WFE();
  }
}

ION_RAMON_GPIOTE  (waking on the GPIOTE IN event):

#define PIN 13
int main(void){
  NRF_GPIO->PIN_CNF[PIN] = 0xC; //input, pullup
  NRF_GPIOTE->CONFIG[0] = 1 | (PIN << 8); // configure IN event
  for(;;){
    __WFE();
  }
}

ION_RAMON_GPIO (waking on GPIO PORT event)

#define PIN 13
int main(void){
  NRF_GPIO->PIN_CNF[PIN] = 0x3000C; //input, pullup, sense low
  for(;;){
    __WFE();
  }
}

[venkatesh dyagala]

Hi,

System off current is observed around 480 nA but spec says 600 nA is that expected?

Thanks,

venkatesh

[Stian Røed Hafskjold]

The spec only shows typical numbers, so 480nA sounds normal.