SWRA499C June 2016 – September 2019 CC1352P , CC1352R , CC2640 , CC2640R2F , CC2642R , CC2642R-Q1 , CC2650 , CC2652P , CC2652R , CC2652R7 , CC2652RB , CC2652RSIP
Using the internal 32 kHz RC oscillator (RCOSC_LF) as Bluetooth Low Energy sleep clock requires performing a periodic, software-based calibration of the RCOSC_LF oscillator. This functionality is included in the royalty-free TI Bluetooth Low Energy software protocal stack (Bluetooth Low Energy Stack) included in SimpleLink SDK 1.0 and onwards.