energy peak every 166 ms in sleep mode

[Kolonka]

hello!

i am using my nrf52832 with s132 softdevice. basically the ble template with my services and charas.

i checked power consumption in sleep mode and observed something interesting. there are energy peaks like 6 times a second. my theory is, that the chip wakes up to check if the wakeup button was clicked. if not, whats happening here? hope its not a misconfiguration.

edit: I got a new theory: the code is compiled in debug mode. in an other thread it says it goes into an 'emulated system off' in that case. I will check tomorrow if it makes a difference, if i compile in release mode. i will update the ticket later

isnt that an average current of 1.5 uA a little bit low? nrf52832 in poweroff and lsm6dsl in sleep should take (0.3 uA to 1.9 uA) + 3uA. actually it will be even lower, if i get rid of the spikes. i did zero-offset the probes before. 15mV should not be that error-prone to measure

[Stian Røed Hafskjold]

Hi, this is refresh spikes. If you search for "refresh spikes" or "refresh mode" here on Devzone you will find posts describing this with plots etc. Short story: This is as expected and the current including the spikes is supposed to be 0.3uA in system OFF mode.

The button is not polled.

Compiling code as "debug" is not the same as entering "debug mode". The emulated system OFF is when you have the debugger attached to the board and are actually debugging the chip.