Excessive current consumption when RTC running.

[Valerii_Ie]

Hi, I use s132 and SDK15 to work with nrf52832. 
In code I set up RTC and CC to trigger every N ticks. It works as expected and time periods counted correctly. However, when I measure current consumption, I notice current pulses about every N/4 ticks. No interrupt triggered except intended CC related. 
I've done an experiment and doubled N = N * 2; The period of current pulses doubled too. So they are related to RTC settings. Their current amplitude is about 6mA and duration 0.5-1.5ms. 
What can it be related to? How  to fix?

Thanks.

 

[Susheel Nuguru]

I am curious to know if there are any other parts of your code logic that depends on the define of N ticks? Can you show me your power consumption analyzer snapshot to see the spikes nature? 

[Valerii_Ie]

Hi Aryan, what pin number do you mean? 

[Susheel Nuguru]

Valerii, are you testing this on a custom board? if so which version of nRF52832 exactly are you using (can you give the lazer markings)? 6mA is too high for just RTC . It seems that something else is also running in the background and it is not just RTC as you seem.

Can you attach your code here, so that i can do a quick test on my desk?

[Valerii_Ie]

Hi Aryan, yes I use custom board and can't publish code. However rtc functionality is based on RTC example taken from sdk 15. Chip marking:  N52832 QFAAE1 1812AJ 

Also current plot: