Analog Devices UG-065 - Manual

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
i MEMS ADXL345 Inertial Sensor Datalogger and Development Board
Please see the last page for an important warning and disclaimers. Rev. 0 | Page 1 of 8
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)
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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.