Hi everyone. Currently I'm developing a custom board which contains the nrf52840 module from EBYTE(E73-2G4M08S1C)
My problem is that the module doesn't have a 32.768KHz external crystal. and it had a 32MHz.
Can I config the nrf52840 to use the 32MHz crystal?
Hi,
You can synthesize the LFCLK from HFCLK with the help of onboard synthesizer:
But the softdevice hasn't been tested with LFSYNT.
Hence it would be better to aim for the RC oscillator, but yes, this is not as accurate as the external crystal, draws more current and is prone to temperature changes. So you should carefully calibrate the temperature.
Best Regards,
Priyanka
