Nordic nRF52810 requires 32 MHz external crystal, but the tolerances are defined only for wireless application (which we do not plan to use).
We want to use this CPU only to handle alarm (Led and sound only - without any complex operation or hard calculations) in case of no battery, while using SuperCup as power source.
Per our calculations, the CPU consumes most of the energy during the alarm duration (over 90%).
In order to save power, we are looking for changing the CPU clock speed from 64 MHz to 32 MHz or even 16 MHz.
Is it possible?
What about using a different external crystal? If we use an 8 MHz crystal, will it work at internal frequency of 16 MHz?
