ETC BCM2045SKFBG-P21

BCM2042
®
SINGLE-CHIP BLUETOOTH® MOUSE AND KEYBOARD
SUMMARY OF BENEFITS
FEATURES
• Single-chip Bluetooth® device with fully integrated Human
• Cost-optimized solution for mouse and keyboard applications
Interface Device (HID) profile and full Bluetooth stack
• On-board 8051 processor and RAM/ROM memory
• Custom-integrated Bluetooth core processor has been
optimized to support the HID v1.0 profile and minimize power
consumption
• Bluetooth version 2.0 compliant including support for adaptive
frequency hopping and fast connect
• Integrated 8 Kbytes of non-volatile flash memory for storing
Bluetooth address and configuration data
• Fully integrated radio eliminates all filters and matching
components and features a single-pin interface directly to
antenna
• Direct interface to keyboard scan matrix with full support for
up to 8 x 20 keys and user-customizable hot keys
• Integrated quadrature signal decoder to support both ball and
optical mouse designs
• Direct interface to LED and LCD displays
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• Achieves lowest possible cost through the integration of all
external components
• Direct interface to key scan matrix or ball/optical mouse
encoders
Replaces existing mouse or keyboard processor and memory
and adds Bluetooth functionality
Lowest power consumption solution provides greater than sixmonth battery life
Adaptive frequency hopping support ensures full
interoperability and coexistence with WLAN enabled personal
computers
Optimized radio provides long-range, interference-free
operation in high-interference environments
• Transmitter provides +4 dBm output power and satisfies Class
2 operation
• Receiver provides -85 dBm receiver sensitivity
Single monolithic bulk CMOS device providing low cost and
high availability of manufacturing supply
• Drive capability to power external optoelectronics
• ROM-based design eliminates external flash memories
APPLICATIONS
• Flash option offered to support feature development
• Fully integrated low dropout (LDO) regulator provides
direction interface to batteries
• Integrated switching regulator to support external sensor and
more to further reduce BOM cost
• Available in 88-pin fpBGA and 120-pin fpBGA packages
• Bluetooth mouse
• Remote control HID devices
• Bluetooth keyboard
• Game controllers
• Combination mouse/keyboard
BCM2042 Functional Block Diagram
Battery
8 KB
Flash
Processing
Unit
20 KB
BOOT
ROM
22 KB
RAM
108 KB
ROM
Switching
Regulator
System Bus
RF Control
and Data
Bluetooth
Baseband
Core
2.4 GHz
Radio
RF I/O
T/R
Switch
Frequency
Synthesizer
XTAL
GPIO for
LEDs, LCD,
Power, etc.
Keyboard
Matrix
Scanner
3-Axis
Mouse
Signal
Decoder
GPIO
Scan
Matrix
Quadrature
Inputs
Power
Mgmt
2.7V to 3.3V
OVERVIEW
Power Control for LEDs
and Sensors
Quad. Sensors
LEDs
Key Scan
Matrix
X-axis
Y-axis
BCM2042
BCM2042
Scroll
Indicators
CAPS
NUM
SCROLL
Left
Middle/Scroll
Right
BCM2042 Mouse Block Diagram
BCM2042 Keyboard Block Diagram
The BCM2042 is a major breakthrough in the design of low-cost
Bluetooth mouse and keyboard devices. The BCM2042 is a true single
chip that integrates the entire profile, application, and Bluetooth protocol
stack and is fully compliant with the Bluetooth SIG specification for
human interface devices. The BCM2042 is fully compliant with the
version 2.0 Bluetooth specification, including adaptive frequency
hopping and fast connection, which are essential to mouse and keyboard
applications in personal computers.
The Bluetooth baseband core has been optimized to maximize the battery
life and functionality required for a mouse or keyboard application.
Battery life has been optimized in the BCM2042 to meet greater than 6
months for the typical user using standard battery technology.
Integration is key to achieving the system cost targets of today's PC
OEMs. By integrating all components within today's mouse and
keyboard into the BCM2042, low system costs can be achieved to
approach the price points of legacy-wired mice and keyboards. The
BCM2042 can interface directly to mouse optical or ball encoders and
keyboard scan matrices.
The BCM2042 integrates a high-performance radio implemented in
standard bulk CMOS. It incorporates a proprietary self-calibrating VCO
structure for both excellent phase noise and fast frequency hopping
covering the entire band. All filters have been fully integrated into the
device and are also self-calibrating to automatically compensate for
changes in temperature and any process variation during manufacturing.
The RF interface to the device fully integrates the T/R switch and its
associates matching circuits, enabling direct interface with the antenna.
The block diagrams show how the BCM2042 can be used in either a
mouse or keyboard application.
Two key integrated components enable the BCM2042 to reach
extremely low system BOM costs and dramatically extend battery life.
The BCM2042 integrates 8 KB of non-volatile memory on-chip.
Because of this, the BCM2042 does not require external flash or
EEPROM when designing bluetooth mice or keyboards. Also, the
BCM2042 integrates a high-performance boost regulator enabling direct
connection with mice electronics. The integration of non-volatile RAM
and the boost regulator enable extremely low system costs.
Broadcom®, the pulse logo, Connecting everything®, and the Connecting everything logo are trademarks
of Broadcom Corporation and/or its affiliates in the United States, EU and/or certain other countries.
Bluetooth® is a trademark owned by 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
© 2005 by BROADCOM CORPORATION. All rights reserved.
2042-PB01-R
02/16/05
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.