Sleep Mode not stopping peripherals.

RE: Sleep Mode not stopping peripherals.

Mauro Silva — Fri, 07 May 2021 18:24:36 GMT

Thank You,Jørgen!

I'm using a custom board so I tried your suggestion:

[quote userid="14926" url="~/f/nordic-q-a/74829/sleep-mode-not-stopping-peripherals/308773#308773"]Have you measured the current consumption with a minimal application (enabling softdevice and going right to system off mode), to see if the current is the same?[/quote]

And indeed the consumption was coming from an active accelerometer I forgot to shutdown.I just put it into low consumption mode and now the total current being draw is just 43uA.

RE: Sleep Mode not stopping peripherals.

Jørgen Holmefjord — Fri, 07 May 2021 14:31:38 GMT

Hi,

Are you testing this on a custom board, or on a nRF52 DK?

Have you measured the current consumption with a minimal application (enabling softdevice and going right to system off mode), to see if the current is the same? This would tell you if the current is drawn from the chip or from something else on your board.

In general, entering System OFF mode will turn off all clock sources and peripherals, only peripherals configured as wakeup sources should be active.

Best regards,
Jørgen