O V E R V I E W
PTU
PCM
PCM
USB
Radio
Modem
Transmitter Path
PA
USB
Digital
Modulator
Bluetooth
Baseband
Core
UART/
SDIO/
SPI
UART/
SDIO/
SPI
LO Generation
Calibration
and
Control
PLL
Frac N
RF
µPU
Bus
Adapter
PIO
GPIO
Digital
Demod
Bit Sync
LNA
ARM
µP
Receiver Path
ROM
RAM
Memory
Interface
Memory
Clock
Gen
Crystal
Interface
XTAL
LPO
Boot
ROM
Internal LPO
Voltage
Regulator
LPO
Interface
VDD
BCM2045 Block Diagram
The Broadcom BCM2045 is a monolithic, single-chip, stand-alone
baseband processor with an integrated 2.4-GHz transceiver for Bluetooth
2.0 + EDR applications. It is fully compliant with the Bluetooth
specification and completely backward-compatible with any Bluetooth
version 1.1 or 1.2-based system. It eliminates the need for external flash
memories and active components by integrating critical components into
the device, thus minimizing the footprint and system cost of
implementing a Bluetooth system.
Bluetooth 2.0 + EDR. By designing the radio to take advantage of EDR,
higher and more reliable through-and greater-link range performance
can be achieved.
Cost optimized solutions can be achieved with the BCM2045 by using
standard chip-on-board assembly techniques. Low risk applications are
enabled through the extensive integration of external passive and active
components. All sensitive RF and analog portions of the Bluetooth radio
and baseband have been integrated into the device including the most
sensitive high-frequency matching components. This eliminates the
possibility of board level interference and degradation in performance
due to the environment and board level designs. Internal voltage
regulation has been added to eliminate the need for a voltage regulator
and the device is capable of operation using a noisy digital 1.8 to 3.6V
power supply.
The BCM2045 EDR solution has been designed in 0.13u bulk CMOS
technology, the most widely available silicon process today. This use of
the advanced process enables the BCM2045 to achieve the lowest
possible current consumption in all modes of operation and maintain the
lowest cost total solution.
The BCM2045 has an architecture that has been designed to take
advantage of the EDR standard. Rather than a modification to an existing
Bluetooth 1.2 radio, the BCM2045 has been optimized to support
Broadcom®, the pulse logo, Connecting everything®, the Connecting everything logo, BroadVoice®, and
BroadSAFE™ are among the trademarks of Broadcom Corporation and/or its affiliates in the United States,
certain other countries and/or the EU. Any other trademarks or trade names mentioned are the property of
their respective owners. Bluetooth® is a trademark of the Bluetooth Sig.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
© 2006 by BROADCOM CORPORATION. All rights reserved.
2045-PB01-R
03/15/06