Is the use of RC oscillator suitable when system OFF?

[bloobird0]

Hello,

my custom board does not have external 32kHz crystal. I have managed to use NRF_CLOCK_LF_SRC_RC in SOFTDEVICE_HANDLER_INIT instead.

My questions are:

• what kind of limitations does the internal RC oscillator have?

• In addition to the value passed to SOFTDEVICE_HANDLER_INIT, do I have anything else to configure or manage? (I'm only using BLE, TWIS, GPIO, APP TIMER and SYSTEM OFF)

• is the usage of RC oscillator compatible with a wake up from system OFF via a pin state change?

Thanks in advance for your time and answers

[Jørgen Holmefjord]

The calibration task is run inside the clock peripheral, and does not halt the application.