Analog Devices UG-065 manual Features, Requirements, General Description

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 Inertial Sensor Datalogger and Development Board

FEATURES

Ultralow power ADXL345 accelerometer 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)

08658-001

Figure 1. Inertial Sensor Development Board

GENERAL DESCRIPTION

It is often a time saver 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 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.

Two AAA batteries power the development board and thus it integrates seamlessly into portable applications. Communications and processing is done by an ARM7-based ADuC7024 micro- 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.

Please see the last page for an important warning and disclaimers. Rev. 0 Page 1 of 8