Hello, I met a question about the use of EFR32BG21 BLE，When I use Bluetooth broadcast in em2 mode, I can't connect successfully with my mobile phone. But it can be used in normal power consumption mode. No 32768k crystal oscillator is used outside my hardware device. Can I use the internal 32768 crystal oscillator configuration to make my device connect to Bluetooth in em2 mode? If I can, I need to configure my clock.