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SWRU271H–October 2010–Revised April 2019
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Overview
Chapter 1
SWRU271H–October 2010–Revised April 2019
Overview
1.1 Support Note
The release history of the Bluetooth Low Energy software development kit (BLE-Stack), including detailed
information on changes, enhancements, bug fixes, and issues can be found in Section 9.4. A porting
guide for updating projects based on earlier BLE-Stack SDK releases to this version can be found in
Section 9.2
NOTE: The TI BLE-Stack v1.5.x is qualified to Bluetooth 5.0 using the same core specification
features as defined by Bluetooth 4.0 and implemented in previous BLE-Stack v1.4.x
releases. References to Bluetooth 4.0 in this and related CC2540/CC2541 documentation
using the v1.5.x release refer to functionality only. For an overview of TI devices that
implement features defined by newer Bluetooth specifications, see www.ti.com/ble.
1.2 Introduction
The beginning Version 4.0 of the Bluetooth standard allows for two systems of wireless technology:
• Bluetooth Basic Rate/Enhanced Data Rate (often referred to as BR/EDR or Classic Bluetooth)
• Bluetooth Low Energy
The Bluetooth Low Energy protocol was created to transmit very small packets of data at a time, while
consuming significantly less power than BR/EDR devices.
Devices that can support BR/EDR and Bluetooth Low Energy are referred to as dual-mode devices.
Typically in a Bluetooth system, a mobile phone or laptop computer will be a dual-mode device. Devices
that only support Bluetooth Low Energy are referred to as single-mode devices. These single-mode
devices are used for application in which low power consumption is a primary concern, such as those that
run on coin-cell batteries.
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