SWRU271I October 2010 – January 2020 CC2540 , CC2540T , CC2541 , CC2541-Q1 , CC2640R2F
Describing the UART and SPI drivers is beyond the scope of this document. For several UART and SPI examples, specifically the Bluetooth Low Energy serial bridge, see the Device Information Service (Bluetooth Specification), version 1.0 (24-May-2011).