Generate 32768 hz signal on a GPIO

[Florin]

Hi,

Sorry for the noob question: I would like to generate a signal on a GPIO pin that beats at exactly at 32768 Hz. Is it possible to use the RTC having prescaler set to 0 and CC set to 1?

Thank you! florin

[Nils Minor]

Hi, why don't you use the RTC signal directly ?

[wlgrd]

Could you elaborate on the use case of this since you cannot use the crystal directly and need it out on GPIO?

[Florin]

Sure. I want to control another chip, a SI4703 that requires a 32kHz clock. I don't know if it's possible to share the same XTAL with the nRF51 though therefore an option is to generate this clock signal separately.

[John]

According to this answer, you can share the crystal:

Earlier answer

[Florin]

I have found the answer I was looking for here: devzone.nordicsemi.com/.../

Thanks for all suggestions! florin