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Bluetron™  Application Specific Module


The Bluetron™ BTR50x module is a complete Bluetooth® solution for fast implementation, cutting your time-to-market. It is a short-range, compact and cost effective radio/baseband module that can be implemented in any kind of electronic devices, such as hands-free car kit, stereo headset/headphone, home audio system, etc.

In standard configuration the module includes a baseband processor with on board Flash memory, a radio front-end, supporting circuitry, together with some higher-level software protocols and applications such as HSP, HFP, A2DP, AVRCP are resided in the Flash.


The Bluetron™ BTR50x module module is a power class 2 Bluetooth® device, and is in compliance with version 3.0 +EDR of the Bluetooth® specification. It is supplied with Bluetron™ protocol stack firmware which runs on the internal microprocessor. Bluetron™ BTR50x module module is built on CSR BC05 Multimedia External core with Flash memory for firmware and application software storage.

*Rewritable Flash Memory: BTR501-8Mbit, BTR502-16Mbit, BTR503-32Mbit

Key Features

  • A small and cost effective Bluetooth® System
  • Bluetooth® specification v3.0 +EDR compliant
  • Class 2, up to 10-meter range
  • Complete 2.4GHz Bluetooth® System including:
    - Hardware: Radio, Baseband and Crystal & Memory
    - Standard Firmware: HCI or RFCOMM stack
  • Integrated 1.8V, 1.5V regulators (linear or switching mode)
  • Compact size: 14.50 mm x 18.40 mm x 2.20 mm
  • Built-in stereo CODEC
  • Integrated battery charger
  • 4.2V tolerant LED driver
  • Support multiple connections
  • Optional noise reduction and echo cancellation software library
  • Enhanced audio quality 95dB SNR for DAC
  • Surface mount module for embedded applications
  • Several firmware options
  • Rewritable flash memory (up to 32Mbit) for easy upgrade route
  • External antenna design


  • Stereo Bluetooth® Headset/Headphone
  • Automotive Car Kit Applications
  • PMP
  • Home Audio System
  • VoIP Headset
  • Analog and USB Mulitmedia Dongle
  • Automotive Wireless Gateway

Technical Data

  • Bluetooth® Class 2 radio (up to 10 meters)
  • Nominal output power up to 6 dBm
  • Nominal sensitivity -86 dBm
  • Uses 2.4 GHz ISM band
  • Based on CSR BC05 Multimedia External chipset
  • Host processor interface with UART, USB
  • SPI interface for firmware and parameter upgrades
  • Single supply voltage
  • Operating temperature: -40oC to +85oC
  • Reference designs and antennas available for several architectures


  • Headset, Hands-free firmware available
  • Possible to use customized firmware
  • Audio codec, SBC & MP3 available

Bluetooth® version 3.0 +EDR

Development and Evaluation

Bluetron™ On-board Installation Kit (Firmware and parameters installation)