nRF52840 - Lowest consumption while being able to wake from timer ?

[pjrebordao]

How to achieve the lowest power consumption while "sleeping" but still being able to awake from an internal timer ?

For the timer I'm using the Ticker class from mbed...

[Jørgen Holmefjord]

Hi,

The lowest possible current with wake on timer is in system ON mode with RTC running and RAM retention turned off (1.5 uA - see Sleep). It looks like the lp_ticker implementation for nRF5x in mbed uses the RTC, but I'm not sure if this is what's used by the Ticker Class. I'm also not sure if mbed has any APIs for turning off RAM retention. 

In general, we do not provide support for mbed anymore. You may direct your questions to the mbed forum.

Best regards,
Jørgen