BCM2040
®
SINGLE-CHIP BLUETOOTH
®
MOUSE AND KEYBOARD
FEATURES
•
Single-chip Bluetooth device with fully integrated Human
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 profile and minimize power
consumption
•
Bluetooth version 1.2 compliant including support for adaptive
frequency hopping and fast connect
•
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
152 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
SUMMARY OF BENEFITS
•
Cost-optimized solution for mouse and keyboard applications
- not a generic HCI device adapted for mouse and keyboard
•
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 six-
month 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
AT commands (7.05 and 7.07)
•
•
•
•
•
Drive capability to power external optoelectronics
•
ROM-based design eliminates external flash memories
•
Flash option offered to support feature development
•
Fully integrated low dropout (LDO) regulator provides
direction interface to batteries
•
Available in 64-pin fpBGA and 100-pin fpBGA packages
•
•
APPLICATIONS
•
Bluetooth mouse
•
Remote control HID devices
•
Bluetooth keyboard
•
Game controllers
•
Combination mouse/keyboard
BCM2040 Functional Block Diagram
BCM2040
Processing
Unit
System Bus
RF Control
and Data
2.4 GHz
Radio
Bluetooth
Baseband
Core
GPIO for
LEDs, LCD,
Power, etc.
Keyboard
Matrix
Scanner
3-Axis
Mouse
Signal
Decoder
RF I/O
T/R
Switch
Frequency
Synthesizer
Power
Management
GPIO
XTAL
Scan
Matrix
Quadrature
Inputs
OVERVIEW
Power Control for LEDs
and Sensors
Quad. Sensors
LEDs
X-axis
Key Scan
Matrix
Y-axis
Scroll
2 AAA
Batteries
BCM2040
Left
2 AAA
Batteries
BCM2040
CAPS
Indicators
NUM
SCROLL
Middle/Scroll
EEPROM
EEPROM
Right
BCM2040 Mouse Block Diagram
The BCM2040 is a major breakthrough in the design of low-cost
Bluetooth mouse and keyboard devices. The BCM2040 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 BCM2040 is fully compliant with the
version 1.2 Bluetooth specification, including adaptive frequency
hopping and fast connection, which are essential to mouse and keyboard
applications in personal computers.
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 BCM2040, low system costs can be achieved to
approach the price points of legacy-wired mice and keyboards. The
BCM2040 can interface directly to mouse optical or ball encoders and
keyboard scan matrices.
BCM2040 Keyboard Block Diagram
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 BCM2040 to meet greater than six
months for the typical user using standard battery technology.
The BCM2040 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 BCM2040 can be used in either a
mouse or keyboard application.
Broadcom
®
, the pulse logo,
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. Any other trademarks or trade names mentioned are the property of their respective owners.
Bluetooth
®
is a trademark owned by Bluetooth SIG.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2006 by BROADCOM CORPORATION. All rights reserved.
2040-PB03-R
03/14/06
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
Robotics Development
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