Running Bluetooth Low Energy on CC2640 Without 32 kHz Crystal

This application report explains how you can configure the Bluetooth Low Energy (BLE) software stack to operate without the need for a 32 kHz crystal on the SimpleLink™ CC13x2 and CC26xx devices.

This application report explains how to configure this mode of operation, what considerations have to be taken to use the internal RC low frequency oscillator (RCOSC_LF) for the Bluetooth Low Energy peripheral and broadcast (beacon) role devices instead of the 32 kHz crystal, and what impact it has on current consumption. This document assumes the reader is familiar with the concepts described in the BLE5-Stack Users Guide and the CC13x2, CC26x2 Simplink^TM Wireless MCU Technical Reference Manual.

Removing the 32 kHz crystal from a design decreases the required board space, reduces the bill of material (BOM) costand simplifies procurement.