Analog Devices iMEMS ADXL345 User Manual
Analog Devices iMEMS ADXL345 User Manual

Analog Devices iMEMS ADXL345 User Manual

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One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
iMEMS ADXL345/ADXL346 Inertial Sensor Datalogger and Development Board

FEATURES

Ultralow power
ADXL345/ADXL346
Inertial sensor development board
Datalogs onto MicroSD card
Fully programmable via serial interface; firmware examples
provided
Battery-powered for portable applications

REQUIREMENTS

2 AAA batteries
MicroSD card and card reader (for datalogging)
Computer with serial port (for programming)

GENERAL DESCRIPTION

It is often a timesaver in hardware development to make progress
on the firmware and the hardware simultaneously. The challenge is
that it proves difficult to develop firmware before the hardware
exists. The iMEMS® ADXL345/ADXL346 development board
is an easy-to-use tool that facilitates prototyping by providing
a platform that can be duplicated in the final application.
Additionally, the development board can be configured as a
datalogger and can be used to gather data for refining algorithms,
tuning thresholds, and generally familiarizing oneself with
accelerometer data.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
accelerometer
Rev. A | Page 1 of 12
Evaluation Board User Guide
Figure 1. ADXL345 Inertial Sensor Development Board
Two AAA batteries power the development board, and thus it
integrates seamlessly into portable applications. Communications
and processing are done by an ARM7-based
controller, and the interface provided is fully reprogrammable.
Moreover, all ADuC7024 pins are broken out into headers to
facilitate design of compatible expansion boards. Data is logged
onto a MicroSD memory card, providing essentially unlimited
memory capacity and operating system versatility. Data is stored in
a text file; therefore, there is no need to install any software to
operate the board or read data. Software is provided to assist
with programming the board.
UG-065
ADuC7024
micro-

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Summary of Contents for Analog Devices iMEMS ADXL345

  • Page 1: Features

    Evaluation Board User Guide UG-065 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com iMEMS ADXL345/ADXL346 Inertial Sensor Datalogger and Development Board FEATURES Ultralow power ADXL345/ADXL346 accelerometer Inertial sensor development board Datalogs onto MicroSD card Fully programmable via serial interface;...
  • Page 2: Table Of Contents

    UG-065 Evaluation Board User Guide TABLE OF CONTENTS     Features ....................1 Getting Started................4     Requirements ..................1 Programming the Board...............4     General Description ................. 1 Software Tools................5     Revision History ................2 Evaluation Board Schematic and Layout ........6  ...
  • Page 3: Overview

    Evaluation Board User Guide UG-065 OVERVIEW ADXL345/ADXL346 inertial sensor development board RST pin is of the ADuC7024 is pulled to GND. Because the has the following features: Schmitt-triggered internally, there is no need to use an external Schmitt trigger on this pin. •...
  • Page 4: Using The Board

    UG-065 Evaluation Board User Guide USING THE BOARD GETTING STARTED Click Configure… (see Figure 3) and select the Parts tab, shown in Figure 4. Make sure the ADuC7024 is selected in The development board comes preprogrammed as a datalogger the Select Part pull-down list (see Figure 4). Additionally, in at a 100 Hz datarate.
  • Page 5: Software Tools

    Evaluation Board User Guide UG-065 SOFTWARE TOOLS To reprogram the board, download the ARMWSD program from the Uploader link in the Development Board section of In addition to the ready-to-upload examples provided in the the ADXL345 product page. Firmware link of the Development Board section of the When Keil Microvision is installed, complete the following steps: ADXL345 product page, the development board is fully...
  • Page 6: Evaluation Board Schematic And Layout

    UG-065 Evaluation Board User Guide EVALUATION BOARD SCHEMATIC AND LAYOUT See the appropriate product pages for electronic versions of the layout and schematic files. Figure 5. ADXL345 Development Board Schematic Rev. A | Page 6 of 12...
  • Page 7 Evaluation Board User Guide UG-065 Figure 6. ADXL345 Development Board Layout Rev. A | Page 7 of 12...
  • Page 8: Changes To Figure 7

    UG-065 Evaluation Board User Guide Figure 7. ADXL346 Development Board Schematic Rev. A | Page 8 of 12...
  • Page 9: Changes To Figure 8

    Evaluation Board User Guide UG-065 Figure 8. ADXL346 Development Board Layout Rev. A | Page 9 of 12...
  • Page 10: Added Appendix

    UG-065 Evaluation Board User Guide APPENDIX: SAMPLE OUTPUT FILE t,x,y,z 1664,25,0,261 0,60,20,247 1674,27,0,263 50,60,19,259 1683,24,-2,263 100,57,17,258 1693,22,-1,265 151,58,18,260 1703,23,-2,264 201,61,14,252 1713,22,0,265 252,58,10,252 1723,22,0,260 302,63,21,248 1732,22,-1,261 353,66,23,255 1742,23,0,258 403,67,21,243 1752,23,-1,259 454,53,35,254 1762,25,-1,256 504,63,32,251 1772,26,-1,256 555,63,31,241 1781,21,-2,257 605,65,33,256 1791,21,-4,256 656,59,34,254 1801,20,-4,259 706,60,34,247 1811,21,-2,260 757,55,41,250 1821,19,-5,260...
  • Page 11 Evaluation Board User Guide UG-065 NOTES Rev. A | Page 11 of 12...
  • Page 12 By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement.

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