BCM2048
®
BLUETOOTH® 2.0 + EDR SINGLE-CHIP HCI SOLUTION WITH INTEGRATED FM+RDS RADIO RECEIVER
BLUETOOTH FEATURES
•
Monolithic single die integration of Bluetooth and FM Radio
•
Bluetooth specification 2.0 +EDR compliant with all data packet types
and lengths supported
•
Best-in-class Bluetooth radio based on the proven BCM2045 core
•
Supports class 1 and 2 designs
•
Integrated InConcert™ 2-wire as well as industry standard 3-wire
collaborative coexistence with WLAN systems
•
No factory alignment required
•
5.5 Volt preregulator allows direct connect to lithium batteries
•
Improved Bluetooth transport with 4-Mbaud UART
•
Includes numerous enhancements for lower power dissipation
•
ROM-based solution with flexible code patching
•
Available in WLCSP 0.6 mm height and FPBGA <1 mm height
FM+RDS RADIO FEATURES
•
•
•
•
•
•
•
•
•
•
•
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76-MHz to 108-MHz FM bands supported (US, Europe, and Japan)
Excellent radio performance with 1 uV sensitivity for 26 dB (S+N)/N
FM control through either BSC-compatible interface or Bluetooth HCI
Signal dependant stereo/mono blending
Signal dependant soft mute
Auto search and tuning modes
Audio silence detection
RSSI, IF frequency, status indicators
RDS and RBDS demodulator and decoder with filter and buffering
functions
Operates from 32-kHz or reference clock inputs
Flexible output interfaces including PCM, I
2
S, and analog stereo DAC
and drivers.
Integrated FM and RDS receiver with only one external cap, one external
inductor and optional antenna matching
SUMMARY OF BENEFITS
•
Bluetooth 2.0 +EDR compliant with easy migration to future specification
•
Low external BOM cost and small area with 10 external RLC
components. The PCB foot print is < 35 mm
2
area.
•
Operates directly from a lithium battery or from fixed voltages down to
1.65 Volt
•
Best-in-class RF performance for longest range and ease of system
integration
•
Full featured FM system with RDS/RBDS capability
•
FM system can operate independently from Bluetooth
•
Highly flexible interfaces for control and data/audio routing
•
Improved power dissipation for longer battery life
APPLICATIONS
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Mobile handsets and smart phones
Personal digital assistants
Mobile MP3 players
BCM2048 Functional Block Diagram
UART
Microprocessor
and Memory Unit
(uPU)
Bluetooth Radio
Transceiver,
Modem
GPIO, Clocks
PCM, I
2
S
High-Speed
Peripheral
Transport Unit
(PTU)
Bluetooth
Baseband Core
(BBC)
I
2
C Compatible
FM Control
and IO
Analog Audio
FM and RDS/
RBDS Radio
Receiver, Modem
OVERVIEW
Vio
Vbat
Bluetooth
PCM
BPF*
UART
I
2
C Compatible
FM
Analog Audio
Handset
Baseband
Ref_Clk, 32 kHz
Match
BCM2048
Clock_req
Host_Wake
BT_Wake
FM IRQ
Coexistence
Rst*
WLAN
* For cell phone applications only
BCM2048 Block Diagram
The Broadcom BCM2048 is a monolithic 0.13 um single-chip
Bluetooth
®
2.0 +EDR compliant stand-alone baseband processor with an
integrated 2.4-GHz transceiver, integrated FM and RDS/RBDS receiver,
and an integrated FM baseband processor. It features the highest level of
integration and eliminates all critical external components, thus
minimizing the footprint and system cost of implementing a Bluetooth
and FM solution. The BCM2048 is firmware upgradeable to future
specifications.
The BCM2048 is the optimal solution for any voice and/or data
application that requires the Bluetooth SIG standard Host Controller
Interface (HCI) via a high-speed UART and PCM. The BCM2048
incorporates all Bluetooth 2.0 +EDR features including eSCO, AFH, fast
connect, all EDR packet types and lengths, and all errata. The BCM2048
also includes InConcert and other industry collaborative coexistence
solutions with WLAN systems.
The BCM2048 Bluetooth radio transceiver provides enhanced radio
performance to meet the most stringent industrial temperature
applications and the tightest integration into mobile handsets and
portable devices. It is fully compatible with any of the standard TCXO
frequencies and provides full radio compatibility to operate
simultaneously with GPS and cellular radios.
The BCM2048 also integrates a complete FM and RDS/RBDS solution.
The integrated solution saves power, external BOM, board space, and
maximizes interface flexibility over a separate Bluetooth and FM
solution. The FM subsystem can operate independently of Bluetooth and
achieve full performance while Bluetooth is operating. It is designed to
cover from 76-MHz up to 108-MHz bands (US, Europe, Japan) and to
operate from either the Bluetooth reference clock or a 32-kHz LPO input.
The FM subsystem supports a conventional BSC-compatible interfaces
and analog outputs for legacy systems, as well as digital interface
options, such as I
2
S and PCM. The I
2
S and PCM interfaces supports 48-
kHz operation and can be either master or slave. The analog interface
consists of high-quality line-level stereo DACs.
The BCM2048 FM subsystem includes advanced RDS/RBDS
capability. The BCM2048 synchronizes, demodulates, decodes RDS/
RBDS signals including CRC processing, post data filter detection,
signal quality estimation, and buffering thus making it easy for an
external application to read and process the RDS/RBDS data.
The FM radio reception performance is very high with 1 uV for 26 dB
(S+N)/N typical sensitivity and > 60 dB SNDR capability making it
easier on system integration and antenna design. The FM subsystem
includes many sought-after features including signal dependant mono/
stereo blend, soft mute, and signal bandwidth control. The system has
digital RSSI, signal quality, and IF frequency error indicators for system
monitoring. Embedded in the FM subsystem are auto search and scan
features and large RDS data buffers to improve interface complexity
with an external host.
The block diagram above illustrates how the BCM2048 can be used in a
cellular application.
Broadcom
®
, the pulse logo, InConcert™,
Connecting everything
®
, and the Connecting everything
logo are among the trademarks of Broadcom Corporation and/or its affiliates in the United States, certain
other countries and/or the EU. Bluetooth
®
is a trademark of the Bluetooth SIG. Any other trademarks or
trade names mentioned are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2006 by BROADCOM CORPORATION. All rights reserved.
2048-PB03-R
09/21/06
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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