RE: Which nRFX peripherals are used by Zephyr?

Vidar Berg — Thu, 10 Jul 2025 18:45:47 GMT

Hello,

Good to see you have identified the problem already. The reason it's not working with TIMER0 is that this instance is reserved the Bluetooth stack (or other wireless stack) (https://docs.nordicsemi.com/bundle/ncs-3.0.0/page/nrfxlib/mpsl/doc/mpsl.html). It's difficult to catch this resource conflict at build time when using the low level drivers directly, unfortunately. It's only this timer instance that's not available.

The system timer (k_timer_init,..) is running of the RTC (32KHz) to provide low power operation.

Best regards,

Vidar