My customer is working on a project and the main criteria is energy saving.
Could you please suggest some good techniques for the following case.
We have to power the MCU from a measuring voltage (I<1mA), may be because the battery is empty.
Due to an additional external watchdog, the load on the supply has increased slightly. This increase causes the unit to turn on later.
What options are possible for the controller to save even more energy? every uA counts so that the device turns back on sooner.
The VCC of the controller is about 1.8 - 1.9V.
The SD24 is switched off.
The PMM is still at its default values.
Thank you in advance,