VMA208
V. 01 – 10/08/2017
3
©Velleman nv
5.
Overview
VMA208
This is a MMA8452Q accelerometer module. The MMA8452Q 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
+-2g/+-4g/+-8g with high-pass filtered data, as well as non-filtered data available real-time This board,
breaks out the ground, power, I2C and two external interrupt pins, which make it easy to use in project.
1.95 V to 3.6 V supply voltage
1.6 V to 3.6 V interface voltage
+-2g/+-4g/+-8g dynamically selectable full-scale
Output Data Rates (ODR) from 1.56 Hz to 800 Hz
12-bit and 8-bit digital output
I2C digital output interface (operates to 2.25 MHz with 4.7 kΩ pullup)
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
current consumption: 6 µA - 165 µA
6.
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.
7.
Example
Connection.
Arduino
®
======MMA8452Q module
5V======Vcc
GND======GND
SDA (A4)======SDA
SCL (A5)======SCL
