Velleman WHADDA MMA8452 User manual

USER MANUAL
EN
3-axis digital acceleration sensor module –MMA8452
WPSE208
whadda.com

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Introduction
To all residents of the European Union
Important environmental information about this product
This symbol on the device or the package indicates that disposal of the device after its
lifecycle could harm the environment. Do not dispose of the unit (or batteries) as unsorted
municipal waste; it should be taken to a specialized company for recycling. This device
should be returned to your distributor or to a local recycling service. Respect the local
environmental rules.
If in doubt, contact your local waste disposal authorities.
Thank you for choosing Whadda! Please read the manual thoroughly before bringing this
device into service. If the device was damaged in transit, do not install or use it and contact
your dealer.
Safety Instructions
Read and understand this manual and all safety signs before using this appliance.
For indoor use only.
•This device can be used by children aged from 8 years and above, and persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction concerning the use of the device in a
safe way and understand the hazards involved. Children shall not play with the device.
Cleaning and user maintenance shall not be made by children without supervision.
General Guidelines
•Refer to the Velleman®Service and Quality Warranty on the last pages of this manual.
•All modifications of the device are forbidden for safety reasons. Damage caused by
user modifications to the device is not covered by the warranty.
•Only use the device for its intended purpose. Using the device in an unauthorized way
will void the warranty.
•Damage caused by disregard of certain guidelines in this manual is not covered by the
warranty and the dealer will not accept responsibility for any ensuing defects or
problems.
•Nor Velleman Group nv nor its dealers can be held responsible for any damage
(extraordinary, incidental or indirect) –of any nature (financial, physical…) arising from
the possession, use or failure of this product.
•Keep this manual for future reference.

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What is Arduino®
Arduino®is an open-source prototyping platform based on easy-to-use hardware and
software. Arduino®boards are able to read inputs –light-on sensor, a finger on a button or a
Twitter message –and turn it into an output –activating of a motor, turning on an LED,
publishing something online. You can tell your board what to do by sending a set of
instructions to the microcontroller on the board. To do so, you use the Arduino
programming language (based on Wiring) and the Arduino®software IDE (based on
Processing). Additional shields/modules/components are required for reading a twitter
message or publishing online. Surf to www.arduino.cc for more information.
Product Overview
The MMA8452Q accelerometer module is a smart, low-power, three-axis, capacitive MEMS
accelerometer with 12 bits of resolution. It is packed with embedded functions with flexible
user-programmable options, configurable to two interrupt pins. Embedded interrupt
functions allow for overall power savings relieving the host processor from continuously
polling data. It has user selectable full scales of ± 2 g/± 4 g/± 8 g with high-pass filtered
data, as well as non-filtered data available real-time.
Specifications
•supply voltage: 1.95-3.6 V
•interface voltage: 1.6-3.6 V
•current consumption: 6-165 µA
•± 2 g/± 4 g/± 8 g dynamically selectable full-scale
•output data rates (ODR): 1.56-800 Hz
•12-bit and 8-bit digital output
•I²C digital output interface (operates to 2.25 MHz with 4.7 kΩpullup)
•two programmable interrupt pins for six interrupt sources
•three embedded channels of motion detection
•orientation (portrait/landscape) detection with set hysteresis
•high-pass filter data available real-time

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Pin Layout
3.3V
Power output –3.3 V output.
Vcc
Power supply –It should be between 3 and 5 V.
SDA
I²C data signal –Bi-directional data line. Voltage should not exceed power
supply.
SCL
I²C clock signal –Master-controlled clock signal. Voltage should not
exceed power supply.
SA0
I²C address –I2C least significant bit of the device I2C address.
I2
Interrupt 2 –Programmable interrupt. Can indicate data ready,
orientation change, tap, and more.
I1
Interrupt 1 –Programmable interrupt. Can indicate data ready,
orientation change, tap, and more.
GND
Ground –0 V/common voltage.
Example
Installation

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