Current measurements on nrf52840 pdk with PPK

[nahro]

ble_app_gls_pca10056_s140.hex

Hi, I am new in this field and i am trying to do current measurement on the nrf52840 PDK using PPK, in sleep mode(sd_power_system_off) i get average 40 micro amp which suppose to be 0,6! while in advertising mode the average is 700 micro amp. I followed this to prepare the PDK for current measurement and this for PPK configration. am i doing it wrong? I am using ble_app_gls example with soft device s140

[Stian Røed Hafskjold]

Hi, can you check with a regular multimeter on P22 (current measurement pin) on the DK to see if it actually is 40µA? Just so we know if there's an issue with the PPK or the DK.

Also run just this code:

int main(void){
    NRF_POWER->SYSTEMOFF =1;
    while(true){__WFE();}
}

Then you have 3 outcomes:

1. The above code reduces current on both PPK and multimeter: There's an issue with the original code
2. The above code reduces current on only the multimeter, not the PPK: There's an issue with the PPK
3. The above code does not reduce current on multimeter. There's an issue with the PCA10056.

[nahro]

Hi Stian, The code does not reduce current on multimete but it reduce on PKK to 2,5µA!

[Stian Røed Hafskjold]

Hmm ok, so that was the 4th outcome I guess... Which does not make any sense. But anyways, since the PPK shows low current now, I think we can assume that the issue lies with the original code. Can you please post the hex file so I can try to measure it here?

[nahro]

The hex file forthe above code?

[Stian Røed Hafskjold]

No sorry, the original code.

[nahro]

you can test any example in sdk14.0 or sdk 14.1 the result will be 40 40µA in sleep mode. I dont know how to attach the hex file in the comment so i attached it in the original question at the first line