System ON sleep mode problems (sometimes ~500uA draw, sometimes ~7.5mA draw), with logging and debugging disabled

RE: System ON sleep mode problems (sometimes ~500uA draw, sometimes ~7.5mA draw), with logging and debugging disabled

Noah — Wed, 05 Aug 2020 09:07:18 GMT

I figured out one part of the power issue. Searching the forums, I found out that you need to call "NVIC_ClearPendingIRQ(SAADC_IRQn);" after uninitializing the SAADC if you want to return to low power mode. This is explained in this ticket: https://devzone.nordicsemi.com/f/nordic-q-a/12971/ble_app_proximity-example-from-sdk-11-draws-over-2ma-constant-on-nrf52

This successfully brings my current consumption down to a little less than 500uA. I will be closing this ticket and opening another ticket to work on getting power down to the 2-3uA range

RE: System ON sleep mode problems (sometimes ~500uA draw, sometimes ~7.5mA draw), with logging and debugging disabled

Noah — Fri, 24 Jul 2020 09:27:23 GMT

Clarification: I have nrf_log_enabled set to 0, and all instances of *log_enabled also set to 0 in my sdk_config.h. Perhaps somebody could use my main.c and sdk_config.h to see if they can replicate the issue, unless you want to manually change paths yourself you can make a copy of the uart example folder in SDK V15.2.0 and replace the main.c file with mine, and replace the sdk_config.h within the pca10040e folder with mine. I intend to run this application with s112 soft device on an nRF52810 chip.