
Figure 3 shows the device configuration in the 6 different orientation modes. These orientations are defined as the following:
PU = Portrait Up, LR = Landscape Right, PD = Portrait Down, LL = Landscape Left, BACK and FRONT side views. There are
several registers to configure the orientation detection and are described in detail in the register setting section.
Top View
PU
Pin 1
Earth Gravity
Side View
LL
Xout @ 0g
Yout @ -1g
LR
BACK
Zout @ 0g
Xout @ 0g
Yout @ 0g
Zout @ -1g
PD
Xout @ -1g
Xout @ 1g
Yout @ 0g
Zout @ 0g
Yout @ 0g
Zout @ 0g
FRONT
Xout @ 0g
Yout @ 0g
Zout @ 1g
Xout @ 0g
Yout @ 1g
Zout @ 0g
Figure 3. Landscape/Portrait Orientation
1.6V - 3.6V
Interface Voltage
1.95V - 3.6V
VDD
4.7 μ F
16
15
14
1
2
VDDIO
BYP
NC
GND
13
12
VDDIO
VDDIO
0.1 μ F
0.1 μ F
3
NC
MMA8451Q
INT1
11
4
SCL
GND
10
4.7k Ω
4.7k Ω
5
GND
6
7
8
INT2
9
INT1
SDA
SCL
INT2
SA0
Figure 4. Application Diagram
MMA8451Q
Sensors
4
Freescale Semiconductor, Inc.