BCM2040
SINGLE-CHIP BLUETOOTH
MOUSE AND KEYBOARD
BCM2040 Functional Block Diagram
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
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
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)
F E A T U R E S
S U M M A R Y O F B E N E F I T S
A P P L I C A T I O N S
Bluetooth mouse
Bluetooth keyboard
Remote control HID devices
Game controllers
Combination mouse/keyboard
RF I/O
XTAL
Processing
Unit
2.4 GHz
Radio
RF Control
and Data
Bluetooth
Baseband
Core
GPIO
GPIO for
LEDs, LCD,
Power, etc.
T/R
Switch
Frequency
Synthesizer
Power
Mgmt
Keyboard
Matrix
Scanner
Scan
Matrix
3-Axis
Mouse
Signal
Decoder
Quadrature
Inputs
System Bus
O V E R V I E W
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
2004 by BROADCOM CORPORATION. All rights reserved.
2040-PB02-R
03/30/04
Broadcom
, the pulse logo, and Connecting everything
are trademarks of Broadcom Corporation and/
or its subsidiaries in the United States and certain other countries. BluetoothTM is a trademark owned by
Bluetooth SIG. All other trademarks mentioned are the property of their respective owners.
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.
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 6
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.
BCM2040 Mouse Block Diagram
BCM2040 Keyboard Block Diagram
LEDs
Quad. Sensors
X-axis
Y-axis
Scroll
EEPROM
Left
Middle/Scroll
Right
Power Control for LEDs
and Sensors
2 AAA
Batteries
BCM2040
BCM2040
EEPROM
2 AAA
Batteries
Key Scan
Matrix
Indicators
CAPS NUM SCROLL
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