Can't find difference in sleep current

RE: Can't find difference in sleep current

StartechLuke — Thu, 18 Jun 2020 02:43:56 GMT

Ok, so I figured it out, we have an app timer that we are using to implement mills() and run the main loop that's ticking over every 1ms, and we need even when asleep. So now what I'm doing is changing the timebase to 10ms when it goes to sleep and back to 1ms when it wakes back up, and that shaves ~0.5mA off the sleep current. Thanks for your help!

RE: Can't find difference in sleep current

StartechLuke — Wed, 17 Jun 2020 18:06:03 GMT

I figured something was still on, but am struggling to find it. I have tried commenting out/not even initializing the peripherals we are using, but none of them appear to be the culprit, as far as I can tell the only thing still "on" is the ble/peer manager...

We're using sdk12.3 and soft device s130 if that makes a difference, and are using a external crystal for the LFCLK

RE: Can't find difference in sleep current

Einar Thorsrud — Wed, 17 Jun 2020 10:13:20 GMT

Hi,

There must be some peripheral still active on the device since it consumes about 0.5 mA. Have you tried to narrow down what this could be by commenting out most of your code (use of peripherals etc.), and adding gradually back to see which change leads to the increased sleep current?