User's Manual Part 1

Wireless Sensing Triple Axis Reference design, Rev. 0.9
Freescale Semiconductor 15
Chapter 3 Sensor Board description
3.1 Board overview
The Sensor Board utilizes a small footprint size dual-layer printed circuit board (PCB) containing all the
necessary circuitry for MMA7260Q accelerometer sensing and transferring data over a radio frequency
(RF).
Figure 3-1Sensor Board overview
The board is powered by a Lithium coin-sized CR2032 battery with provisions also made for the larger
capacity CR2477 size. The block diagram of the board is as follows:
Lithium battery on the opposite side
MC13191
MC9S08QG8
MMA7260Q
Battery Switch
LED indicators
PCB antennas
BDM interface
Buttons