User Manual

Wireless Sensing Triple Axis Reference design, Rev. 0.9
Freescale Semiconductor 9
Chapter 1
Introduction
1.1 Introduction
This paper describes the design of a Wireless Sensing Triple Axis Reference design (ZSTAR), a demo
for wireless demonstration of the 3-axis accelerometer MMA7260Q sensors from Freescale.
The reference design will enable you to see how Freescale's accelerometers can add additional
functionality to applications in various industries. The accelerometer measurements can be grouped into
6 sensing functions - Fall, Tilt, Motion, Positioning, Shock and Vibration - for multifunctional applications.
The RD3152MMA7260Q development tool offers robust wireless communication using the powerful,
easy-to-use 2.4GHz frequency MC13191 transceiver. Minor changes can be made with pin to pin
compatibility allowing implementation of the MC13192 and MC13193 for ZigBee
TM
wireless applications.
Figure 1-1 ZSTAR Demo photo
(CR2032 batteries for comparison)
1.2 MMA7260Q 3-axis Accelerometer Sensor
The MMA7260Q low cost capacitive micromachined accelerometer features signal conditioning, a 1-pole
low pass filter and temperature compensation, and g-Select, which allows a selection from 4 sensitivities.
Zero-g offset full scale span and filter cut-offs are factory set and require no external devices. This device
includes a sleep mode making it ideal for handheld battery powered electronics.