Avago ADNS-3530 LED鼠标方案
Avago公司的ADNS-3530是低功耗光学导航传感器,具有新形低功耗架构和自动电源管理模式,使它非常适合用在以电池为能源和对功耗敏感的地方如无线输入装置. ADNS-3530有两种可选择的分辨率500和1000cpi,工作电压从2.7V到3.6V,有四路串口,无源元件数量最低,广泛应用在便携式PC的密你鼠标,光学笔,家庭娱乐,消费类电子和玩具以及各种无线应用.本文介绍ADNS-3530光学导航传感器的主要特性,以及ADNB-3532 LED鼠标模块设计指南,相应的应用电路以及所用的元件列表.The ADNS-3530 is a low-power optical navigation sensor. It has a new, low-power architecture and automatic power management modes, making it ideal for battery-and power-sensitive applications such as cordless input devices.
The ADNS-3530 is capable of high-speed motiondetection — up to 20 ips and 8 G. In addition, it hasan on-chip oscillator and integrated LED to minimizeexternal components.
The ADNS-3530, along with the ADNS-3150-001 lens, forms a complete and compact mouse tracking system. There are no moving parts which means high reliabil¬ity and less maintenance for the end user. In addition, precision optical alignment is not required, facilitating high volume assembly.
The ADNB-3532 LED mouse bundle is a small formfactor (SFF) LED illuminated navigation system. The bundle consists of an integrated chip-on-board (COB), LED mouse sensor ADNS-3530 and a SFF lens ADNS-3150-001.
The ADNS-3530 is based on Optical Navigation Technol¬ogy, which measures changes in position by optically acquiring sequential surface images (frames) and math¬ematically determining the direction and magnitude of movement.
The ADNS-3530 contains an Image Acquisition System (IAS), a Digital Signal Processor (DSP), and a four wireserial port.
The IAS acquires microscopic surface images via the lens and illumination system. These images are processedby the DSP to determine the direction and distanceof motion. The DSP calculates the Dx and Dy relativedisplacement values.
An external microcontroller reads the Dx and Dy infor¬mation from the sensor serial port. The microcontroller then translates the data into PS2, USB, or RF signals0before sending them to the host PC or game console.
The bundle consists of an integrated chip-on-board (COB) LED mouse sensor ADNS-3530 and a SFF lens ADNS-3150-001. The ADNS-3530 is a low-power optical navigation sensor. It has a new, low-power architecture and automatic power management modes, making it ideal for battery and power-sensitive applications such as cordless input devices. It is capable of high speed motion detection. In addition, it has an on-chip oscillator to minimize external components.
主要特性:
Low power architecture
Small form factor
Surface mount technology (SMT) device
self-adjusting power-saving modes for longest battery life
High speed motion detection
Self-adjusting frame rate for optimum performance
Motion detect pin output
Internal oscillator- no clock input needed
Selectable 500 and 1000cpi resolution
Wide operating voltage: 2.7V - 3.6V nominal
Four wire serial port
Minimal number of passive components
应用:
图1.ADNS-3532鼠标模块2D安装图
图2.ADNS-3530和微控制器的接口电路图
ADNB-3532 LED鼠标模块设计指南
This design guide describes the design of a low power consumption optical mouse using the new Avago Technologies ADNS-3530 low power small form factor optical mouse sensor, Texas Instruments MSP430F1222 microcontroller and Nordic Semiconductor nRF2402 2.4GHz RF transmitter. The receiver dongle is implemented with a Nordic Semiconductor nRF2401A 2.4GHz RF transceiv¬er in conjunction with a Cypress CY7C63231A enCoRe™ USB controller. This reference design kit provides a power efficient and feature-rich solution in one small and slim package.
The design guide discusses the reference design hardware and firmware implementation. The document starts with the basic operations of a computer mouse peripheral followed by an introduction to the Avago ADNS-3530 low power optical mouse sensor, the Nordic Semiconductor nRF2402 transmitter and nRF2401A transceiver, Texas Instruments MSP430F1222 micro¬controller. The software section of this application note describes the architecture of the firmware required to implement the mouse and the USB dongle functions. Included in Appendix A is the schematic for this reference design mouse and USB dongle.
The ADNK-3533-TN24 low power slim optical mouse utilizes the ADNS-3530 low power Light Emmiting Diode (LED) slim mouse sensor. The LED mouse sensor is a small form factor (SFF) LED illuminated navigation system which consists of an integrated chip-on-board (COB) LED mouse sensor ADNS-3530 and a SFF lens ADNS-3150-001.
Texas Instrument MSP430F1222 Microcontroller
The Texas Instruments MSP430 family of ultra-low power microcontrollers consists of several devices featuring different sets of peripherals targeted for various applica¬tions. The architecture, combined with five low-power modes, is optimized to achieve extended battery life in portable measurement applications. The device features a powerful 16-bit RISC CPU, 16-bit registers, and constant generators that attribute to maximum code efficiency. The Digitally Controlled Oscillator (DCO) allows wake-up from low-power modes to active mode in less than 6 μsec.
The specific device used in this reference design is the MSP430F1222 with 28 pin to accommodate ample amount of I/O. It is an ultra-low power mixed-signal mi¬crocontrollers with a built-in 16-bit timer, 10-bit A/D converter with integrated reference and Data Transfer Controller (DTC), and 14 (20 pin package) or 22 (28 pin package) general purpose I/O pins. The MSP430x12x2 series microcontrollers have built-in communication ca¬pability using asynchronous (UART) and synchronous (SPI) protocols. The architecture, combined with five low power modes is optimized to achieve extended battery life on wireless application.
MSP430F1222微控制器主要特性:
Low Supply Voltage Range 1.8 V to 3.6 V
Ultra Low-Power Consumption:
Active Mode: 200 μA at 1 MHz, 2.2 V
Standby Mode: 0.7 μA
Off Mode (RAM Retention): 0.1 μA
Five Power Saving Modes
Wake-Up From Standby Mode in less than 6 μs
16-Bit RISC Architecture, 125 ns Instruction Cycle Time
Basic Clock Module Configurations:
Various Internal Resistors
Single External Resistor
32-kHz Crystal
High Frequency Crystal
Resonator
External Clock Source
16-Bit Timer_A With Three Capture/Compare Registers
10-Bit, 200-ksps A/D Converter With Internal Reference, Sample-and-Hold, Autoscan, and Data Transfer Controller
Serial Communication Interface (USART0) With Software-Selectable Asynchronous UART or Synchronous SPI
Serial Onboard Programming, No External Programming Voltage Needed Programmable Code Protection by Security Fuse
Supply Voltage Brownout Protection
4KB + 256B Flash Memory 256B RAM
Available in 28-Pin Plastic SOWB, 28-Pin Plastic TSSOP, and 32-Pin QFN Packages
Nordic Semiconductor nRF2402 2.4GHz Transmitter and nRF2401A 2.4GHz Transceiver
The Nordic nRF2402 and nRF2401A are the low-power, single-chip radio transmitter and transceiver for the world wide 2.4 - 2.5 GHz ISM band. The entire transmitter and transceiver including all inductors and filters are in¬tegrated in each single chip respectively which gives the lowest cost solution to the end user. All configurations of the nRF2402 transmitter and nRF2401A transceiver are done via a standard serial interface. The nRF devices include the ShockBurst engine which allow for high data rates on air using low data rates between the micro¬controller and the nRF device, it will also automatically validate the packets address and CRC, further reducing the microcontrollers processing tasks.
nRF2402 2.4GHz发送器主要特性:
Features for nRF2402 2.4GHz Transmitter
True single chip GFSK transmitter in a
small 16-pin package (QFN16 4x4)
Adjustable output power up to 0dBm
Data rate 0 to 1Mbps
Low Bill of Material
Multi Channel operation
128 channels
Support frequency hopping
Channel switching time <200ms.
Power supply range: 1.9 to 3.6 V
CRC computation
ShockBurst mode for ultra-low power operation
Low supply current, typical 10mA peak @ -5dBm output power
100% RF tested
nRF2401A 2.4GHz收发器主要特性:
Features for nRF2401A 2.4GHz Transceiver
True single chip GFSK transceiver in a small 24-pin package (QFN24 5x5mm)
Data rate 0 to 1Mbps
Only 2 external components
Multi channel operation
125 channels
Channel switching time <200ms.
Support frequency hopping
Data slicer / clock recovery of data
Address and CRC computation
DuoCeiver for simultaneous dual receiver topology
ShockBurst mode for ultra-low power operation and relaxed MCU performance
Power supply range: 1.9 to 3.6 V
Low supply current (TX), typical 10.5mA peak @ -5dBm output power
Low supply current (RX), typical 18mA peak in receive mode
100 % RF tested
No need for external SAW filter
图3.ADNK-3533-TN24参考设计鼠标功能方框图
ADNK-3533-TN24 Reference Design Mouse Functional Block Diagram
图4.MSP430F电路图
Figure A1. Circuit-level for MSP430F.
图5.ADNS-3530电路图
Figure A2. Circuit-level for ADNS-3530.
图6.电压稳压器和电源管理电路图
Figure A3. Circuit-level for voltage regulator and battery management.
图7.发送器nRF2402电路图
Figure A4. Circuit-level for transmitter nRF2402.
图8. CY7C63231A enCoRe USB微控制器和nRF2401A收发器Dongle电路图
Figure A5. Circuit diagram of CY7C63231A enCoRe USB microcontroller and nRF2401A transceiver Dongle
表1.电路图中所用元件列表:
Bill of Materials for Components Shown on schematic
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