32 KHz clock out

[Vishnu Pradeep]

I am new to nRF ICs.

How to get 32.678KHz clock out from a pin? Is it possible? If yes, from which pin and how to configure it? I am using 32.768KHZ external crystal fro nRF52832

Thanks, Vishnu

[Susheel Nuguru]

This thread has discussed this. The closest I can get is 32.787kHz (if using 16MHz clock) (look at comment from @Tosa). If you want to generate it using LF XTAL and RTC then you can get half of that with almost same accuracy as the XTAL (board capacitance might come to picture).

[Vishnu Pradeep]

I am using an external 32Khz crystal for nRF. Is it possible to step up this frequency with the help of internal PLL? Does nRF52 provides an option for that?

[Susheel Nuguru]

I'm afraid you cannot do that.

[Vishnu Pradeep]

@Aryan: Is there any way that nRF52 with a 32KHz external crystal can out 32KHz clock?

[Susheel Nuguru]

No Vishnu, it is not possible to clock out exactly 32768 Hz to GPIOSs using nRF