The BTM520 and BTM521 are the most advanced low-power, multimedia Bluetooth
®
modules available
in the marketplace. Designed to meet the needs of developers requiring the ultimate Bluetooth audio
performance and flexibility, these modules include everything required for a fully qualified and functional
Bluetooth multimedia application.
In addition to providing best-in-class radio performance, range, and power consumption, the BTM520/521
support all the functionality to run Cambridge Silicon Radio’s Road Tunes and Blue Tunes development
applications. They support the latest Bluetooth Version 2.1+EDR Specification, providing secure simple
pairing that improves security and enhances easy use. (The BTM521 has an integrated high-performance,
multilayer ceramic antenna that achieves open field ranges in excess of 300 meters.)
The modules include a 16 bit stereo codec and microphone input to support both stereo and mono
applications, with the ability to drive stereo speakers. Containing all the necessary audio filtration and
biasing components, these modules only require the addition of speakers, microphone, and push buttons
to make a high-quality Bluetooth stereo product.
The BTM520/521 contain a full, integrated Bluetooth stack along with SPP, HFP 1.5, HSP, AVRCP, and A2DP
profiles, all of which are Bluetooth qualified. Additional profiles could be made available for file transfer,
object exchange, dial up networking, messaging, and phonebook control.Because these modules are
pre-qualified, customers can list and promote their products free of charge on the Bluetooth website.
These modules include an embedded 32-bit, 64-MIPS DSP core within the BC05 that is integrated with
the Bluetooth functionality, allowing the addition of significant product enhancements, such as echo
cancellation, noise reduction, and audio enhancement using additional soft codecs. The availability of the
16MB of flash memory in the module allows complex functionality to be included. DSP routines can be
licensed through a number of specialist partners.
To speed product development and integration, Laird Technologies has developed a comprehensive AT command
interface that simplifies application development, including support for audio and headset functionality.
Combined with a low-cost development kit, Laird Technologies’ Bluetooth modules provide faster time to market.
global
solutions:
local
support
USA: +1.800.492.2320
Europe: +44.1628.858.940
Asia: +852.2268.6567
wirelessinfo@lairdtech.com
www.lairdtech.com/wireless
TM
Bluetooth Multimedia Module
®
Innovative
Technology
for a
Connected
World
BTM520/521
FEATURES
• Fully featured Bluetooth
multimedia module
• Supports CSR Road Tunes
and Blue Tunes applications
• Bluetooth v2.1+EDR
• Supports mono and stereo
headset applications
• Adaptive frequency hopping to cope with
interference from other wireless devices
• 32bit Kalimba DSP for enhanced
audio applications
• Support for secure simple pairing
• External or internal antenna options
• HSP, HFP, A2DP and AVRCP audio profiles
• HDP profiles (later release)
• 16 bit stereo codec and microphone input
• Integrated audio amplifiers for driving
stereo speakers
• Comprehensive AT interface for
simple programming
• Bluetooth End product qualified
• Compact size
• Class 1 output – 8dBmi
• Lowest power operation with high
efficiency internal switch mode supply.
• Wi-Fi coexistence hardware support
APPLICATION AREAS
• High quality stereo headsets
• Hands-free devices
• Wireless audio cable replacement
• MP3 and music players
• Phone accessories
• VoIP products
• Aftermarket automotive
applications
2
Bluetooth Multimedia Module
®
BTM520/521
Innovative
Technology
for a
Connected
World
CATEGORIES
Wireless Specification
FEATURE
Bluetooth
®
Frequency
Max Transmit Power
Receive Sensitivity
Data Rates
UART Data Transfer Rate
UART
Codec
Microphone
Integrated Kalimba DSP
IMPLEMENTATION
Version 2.1+EDR
2.402 – 2.480 GHz
Class 1
+ 6dBm (at antenna connector – BTM520)
+8dBmi (from integrated antenna – BTM521)
Better than -86dBm
Up to 2.1Mbps (over the air)
Greater than 300 Kbps
Supports DTR, DSR, DCD and RI, multiplexed with other functionality.
Internal 16 bit Stereo Codec
Integrated Amplifiers for driving Stereo Speakers
Integrated low noise microphone bias
32bit, 64MIPS
GAP (Generic Access Profile)
SDP (Service Discovery Profile)
SPP (Serial Port Profile)
HSP
HFP – Audio Gateway and Handsfree
A2DP – Source and Sink
AVRCP – Target and Controller
SCO/eSCO
3.0V – 4.2V DC
1.7V – 3.6V DC
Operational - Less than 80 mA (including speaker amplifiers)
Idle (sleep) < 1.5mA
2-wire and 3-wire hardware coexistence schemes supported
u.fl connector for external antenna – BTM520
Multilayer ceramic antenna – BTM521
AT Command Set (extended for audio and headset functions
and secure simple pairing)
20.0mm x 36.0mm x 4.1mm - BTM 520
20.0mm x 36.0mm x 5.1mm - BTM 521
-30°C to +70°C
-40°C to +85°C
Lead-free and RoHS compliant
1 Year
Development board and software tools
BTM520 - Full Modular Approval w/specified antenna
BTM521 - Full Modular Approval
Host Interface
Audio Interfaces
DSP
Profiles
Supply Voltage
Power Consumption
Coexistence / Compatibility
Connections
Programming API
Physical
Environmental
Miscellaneous
Development Tools
Approvals
Supply
I/O
Current Consumption
802.11 (Wi-Fi)
External Antenna
Internal Antenna
Dimensions
Operating Temperature
Storage Temperature
Lead free
Warranty
Development Kit
FCC/IC & CE
ORDERING INFORMATION
BTM520
BTM521
DVK- BTM520
DVK- BTM521
Bluetooth Multimedia Plus Module (external antenna)
Bluetooth Multimedia Plus Module (with integrated antenna)
Evaluation Board with BTM520
Development Kit (with integrated antenna)
The details contained within the document are subject to change. Download the product
specification from www.lairdtech.com/wireless for the most current specification.
3
Bluetooth Multimedia Module
®
Innovative
Technology
for a
Connected
World
BTM520/521
LAIRD TECHNOLOGIES—WIRELESS MODULES
FOR EVERY APPLICATION
Bluetooth
®
• Modules for data and multimedia applications
• Pre-qualified modules for rapid integration
802.11
• Modules for connection to Wi-Fi networks
• Low power M2M modules
• Video streaming modules
Proprietary
• Modules for 868MHz, 900MHz and 2.4MHz
ZigBee
TM
• Modules for low power mesh networking
Development Kits are available for all the above wireless modules.
Telematics
• End-to-end wireless telematics hardware and solutions
Industrial
• Rugged wireless connectivity products, bridges, and access points
Visit www.lairdtech.com/wireless for details on our full range of wireless products,
as well as extensive range of white papers and applications notes.
global
solutions:
local
support
USA: +1.800.492.2320
Europe: +44.1628.858.940
Asia: +852.2268.6567
wirelessinfo@lairdtech.com
www.lairdtech.com/wireless
TM
LWS-DS-BTM520-521 0310
Any information furnished by Laird Technologies, Inc. and its agents is believed to be accurate and reliable. All specifications are subject to change without notice.
Responsibility for the use and application of Laird Technologies materials rests with the end user, since Laird Technologies and its agents cannot be aware of all potential
uses. Laird Technologies makes no warranties as to the fitness, merchantability or suitability of any Laird Technologies materials or products for any specific or general uses.
Laird Technologies shall not be liable for incidental or consequential damages of any kind. All Laird Technologies products are sold pursuant to the Laird Technologies’ Terms
Laird, Laird Technologies, the Laird Technologies Logo, and other marks are trade marks or registered trade marks of Laird Technologies, Inc. or an affiliate company
thereof. Other product or service names may be the property of third parties. Nothing herein provides a license under any Laird Technologies or any third party
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