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Home >> Products >> Embedded Wireless Modules >> Embedded Bluetooth Modules >> AXB081

 AXB081 -- Bluetooth Audio Module with CSR8670

The AXB081 Bluetooth module built in a CSR8670 Bluetooth chip, is a perfect solution for consumer audio platform wired and wireless applications, integrates an ultra-low power DSP and application processor with embedded flash memory, a high performance stereo codec, a powerful management subsystem, LED and LCD drivers in a SoC. The enhanced Kalimba DSP coprocessor with 80MIPS supports enhanced audio and DSP applications.

The AXB081 Bluetooth module complies with Bluetooth specification version 3.0 (BT 4.0 Compatible). It supports HSP, HFP, A2DP, AVRCP profiles. It integrates RF, Baseband controller, etc. And it also provides UART interface, USB interface programmable I/O, stereo speaker output (Analog – differential, Digital – PCM, SPDIF & I²S), microphone input, etc.


  • Small overall dimension (17.8mm x 15.8mm x 1.8mm)
  • Bluetooth Specification V3.0 (BT 4.0 Dual Mode Compatible)
  • Bluetooth Class2 (max 4dBm) module
  • Integrated switch-mode regulator
  • Physical connection as SMD type
  • Integrated Battery Charger (200mA)
  • 16Mb internal flash memory (64-bit wide,45ns)
  • Optional support for 16Mb of SPI flash
  • Embedded Kalimba DSP Co-Processor
  • Integrated 16-bit Stereo Audio CODEC
  • Support for CSR’s latest CVC technology for narrowband and wideband voice connections including wind noise reduction
  • Support USB 2.0 or UART interface
  • Audio interfaces: I²S and SPDIF
  • SBC, MP3, AAC, Faststream, APTX codec support
  • APTX low-latency including support for SCMS-T
  • Support HSP, HFP, A2DP, AVRCP, PBAP, and SPP
  • RoHS compliant
Target Applications:
  • TVs
  • Smart Remote Controllers
  • Wired or Wireless Soundbars
  • Wired or Wireless Speakers and Headphones
  • Wearable Audio

 Block Diagram


 General Specification


 Selection Guide


Technical Documentation

 Product Brief, Product Introduction and Datasheet

AXB081 Brief156.8 KB2015-06-11
AXB081 Datasheet 961.6 KB2015-06-18
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AXB0xx BT Modules Product Introduction 900.2 KB2017-02-15

Hardware Design Documentation

 Reference Schematics

AXB081 BT Module Application Reference Schematic 145.1 KBv2.002015-06-26

 Bill of Materials, Application Notes and Layout Guides

AXB081 BT Module Application Reference Schematic BOM File 0.9 KB2015-06-26
AXB0xx BT Module Antenna Design Note  
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