Avago AN-3533-BRBT蓝牙鼠标方案

Avago公司的AN-3533-BRBT低功耗蓝牙光学鼠标采用Avago的光学导航传感器ADNS-3530和Broadcom公司的BCM92042MDX-B88蓝牙ROM模块.接收器采用Broadcom的BCM2045.本文介绍了AN-3533-BRBT蓝牙鼠标的主要特性以及相关主要器件的特性, 蓝牙鼠标功能方框图以及各个部分的详细电路图和所用元器件清单(BOM).

AN-3533-BRBT Bluetooth Optical Mouse Concept Design
This design guide describes the design of a low power consumption Bluetooth optical mouse using the Avago Technologies ADNS-3530 optical navigation sensor and Broadcom BCM92042MDX-B88 Bluetooth ROM module. The receiver dongle is implemented with a Broadcom BCM2045 Chip. The document starts with the basic operations of a computer mouse peripheral followed by an in¬troduction to the Avago Technologies ADNS-3530 Optical Navigation Sensor and the Broadcom BCM92042MDX-B88 Bluetooth ROM module. The software section of this design guide gives overview about the general architecture of the firmware implemented in the mouse.

All schematic diagrams of the BCM92042MDX-B88 Bluetooth ROM module to the ADNS-3530 optical sensor and buttons of a standard mouse, as well as the receiver dongle can be found in Appendix A. The ADNS-3530 data sheet is available from the Avago Technologies website at: http://www.avagotech.com. The Bluetooth device information is available from the Broadcom website at www.broadcom.com. USB documentation can be found at the USB Implementers Forum web site at www.usb.org. For more information regarding Bluetooth, please visit www.bluetooth.com.

AN-3533-BRBT主要特性:
Complete LED Bluetooth mouse reference design kit
Windows® 98SE, Windows 2000 and Windows XP compatibility
USB 2.0 low-speed compliance
User identity code to avoid conflict with other devices
High reliability
Smooth surface navigation
High speed motion detection up to 20 ips and 8 G
1000 cpi resolution
A high data rate 2.4GHz RF link
Transmission data rate up to 1 Mbps
10 meters communication distance
Self-adjusting power saving modes for longest battery life
Minimal number of passive components

This reference design features the ADNS-3530 optical navigation engine. It contains an Image Acquisition System (IAS), a Digital Signal Processor (DSP), and a three-wire Serial Peripheral Interface consists of the serial clock (SCLK), the master-in/slave-out (MISO) and the master-out/slave-in (MOSI). An addition fourth signal, Motion, is an output intended to act as an interrupt to the mi¬crocontroller whenever the ADNS-3530 senses motion. When the mouse is moved, the ADNS-3530 alerts the system controller by activating the Motion signal which triggers an interrupt service routine. At the same time, the ADNS-3530 accumulates the horizontal and vertical displacements in its Delta_Y and Delta_X registers re¬spectively. The ADNS-3530 deactivates the Motion signal as soon as movement stops. The frame rate is self-ad¬justable for optimum performance. It also manages the integrated LED driver to coordinate with the shutter. The system controller reads the motion information and reports it to the PC to update the cursor position.
The advantages of using ADNS-3530 optical sensor are the efficient power management, high tracking accuracy, and efficient communications with the optical sensor via the full duplex SPI port.
To learn more about sensor’s technical information, please visit the Avago Technologies web site at http://www.avagotech.com.

BCM2042MDXB88模块的主要特性:
Broadcom BCM92042MDX-B88 ROM Module
General Description
The Broadcom BCM2042MDXB88 module is a Bluetooth HID Profile 1.0 compliant product based on BCM2042 chip. The module is ideal for applications in wireless input devices including keyboards, mice, joysticks, and game controllers. The module is designed to provide low-power, low-cost, robust communications for applications operating in the globally available 2.4-GHz unlicensed ISM band.

Main Features:
Class 2 Module
Integrated switching regulator to support external sensor to reduce external BOM cost. Dual Voltage output 1.8V and 3.0V
Bluetooth HID profile version 1.0 compliant.
Supports Adaptive Frequency Hopping (AFH)
Excellent receiver sensitivity about -85 dbm
EEPROM mounted module design
On-chip support for common keyboard and mouse interfaces eliminates external processor.
Programmable key-scan matrix interface, up to 8x20 key-scanning matrix.
3-axis quadrature signal decoder for mouse application, SPI interface, A/D input,
On-chip support for Serial Peripheral Interface (master mode only).
Integrated 8051 microprocessor core.
On-chip software control power management unit.



图1. AN-3533-BRBT蓝牙鼠标功能方框图
AN-3533-BRBT Reference Design Mouse functional Block Diagram



图2. 光学鼠标传感器应用电路图