MMA8453QT Freescale Semiconductor, MMA8453QT Datasheet - Page 27

• Manufacturer Part Number: MMA8453QT
• Description: Board Mount Accelerometers LOW G 3-AXIS DGTL ACCEL
• Manufacturer: Freescale Semiconductor

Specifications of MMA8453QT

• Sensing Axis: X, Y, Z
• Acceleration: 2 g, 4 g, 8 g
• Digital Output - Number Of Bits: 8 bit, 10 bit
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.95 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Digital Output - Bus Interface: I2C
• Shutdown: Yes
• Sensitivity: 256 count/g, 512 count/g, 1024 count/g
• Package / Case: QFN-16
• Output Type: Digital
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.2
note AN4068.
0x10: PL_STATUS Portrait/Landscape Status Register
of the orientation by reading the other bits. For further understanding of Portrait Up, Portrait Down, Landscape Left, Landscape
Right, Back and Front orientations please refer to
BAFRO, or LAPO occurs. NEWLP bit is cleared anytime PL_STATUS register is read. The Orientation mechanism state change
is limited to a maximum 1.25g. LAPO BAFRO and LO continue to change when NEWLP is set. The current position is locked if
the absolute value of the acceleration experienced on any of the three axes is greater than 1.25g.
Table 18. High Pass Filter Cut-off Options
Table 19. PL_STATUS Register Description
1. The default power up state is BAFRO = 0, LAPO = 0, and LO = 0.
Sensors
Freescale Semiconductor
0x10 PL_STATUS Register (Read Only)
LAPO[1:0]
For more details on the meaning of the different user configurable settings and for example code refer to Freescale application
This status register can be read to get updated information on any change in orientation by reading Bit 7, or on the specifics
NEWLP is set to 1 after the first orientation detection after a STANDBY to ACTIVE transition, and whenever a change in LO,
NEWLP
SEL1
NEWLP
BAFRO
Bit 7
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
LO
(1)
Portrait/Landscape Embedded Function Registers
Landscape/Portrait status change flag. Default value: 0.
0: No change, 1: BAFRO and/or LAPO and/or Z-Tilt lockout value has changed
Z-Tilt Angle Lockout. Default value: 0.
0: Lockout condition has not been detected.
1: Z-Tilt lockout trip angle has been exceeded. Lockout has been detected.
Landscape/Portrait orientation. Default value: 00
00: Portrait Up: Equipment standing vertically in the normal orientation
01: Portrait Down: Equipment standing vertically in the inverted orientation
10: Landscape Right: Equipment is in landscape mode to the right
11: Landscape Left: Equipment is in landscape mode to the left.
Back or Front orientation. Default value: 0
0: Front: Equipment is in the front facing orientation.
1: Back: Equipment is in the back facing orientation.
SEL0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Bit 6
LO
800 Hz
16 Hz
16 Hz
16 Hz
16 Hz
8 Hz
4 Hz
2 Hz
8 Hz
4 Hz
2 Hz
8 Hz
4 Hz
2 Hz
8 Hz
4 Hz
2 Hz
Bit 5
0
400 Hz
Oversampling Mode = Low Noise Low Power
16 Hz
16 Hz
16 Hz
8 Hz
4 Hz
2 Hz
8 Hz
4 Hz
2 Hz
8 Hz
4 Hz
2 Hz
8 Hz
4 Hz
2 Hz
1 Hz
Oversampling Mode = High Resolution
Oversampling Mode = Low Power
Oversampling Mode = Normal
Figure
Bit 4
200 Hz
0.5 Hz
16 Hz
8 Hz
4 Hz
2 Hz
1 Hz
8 Hz
4 Hz
2 Hz
1 Hz
8 Hz
4 Hz
2 Hz
4 Hz
2 Hz
1 Hz
0
3.
The interrupt is cleared when reading the PL_STATUS register.
0.25 Hz
100 Hz
0.5 Hz
0.5 Hz
0.5 Hz
16 Hz
4 Hz
2 Hz
1 Hz
4 Hz
2 Hz
1 Hz
8 Hz
4 Hz
2 Hz
2 Hz
1 Hz
Bit 3
0
0.125 Hz
0.25 Hz
0.25 Hz
0.25 Hz
0.5 Hz
0.5 Hz
0.5 Hz
50 Hz
16 Hz
2 Hz
1 Hz
2 Hz
1 Hz
8 Hz
4 Hz
2 Hz
1 Hz
LAPO[1]
Bit 2
0.125 Hz
0.063 Hz
0.125 Hz
0.063 Hz
0.031 Hz
12.5 Hz
0.25 Hz
0.25 Hz
0.25 Hz
0.5 Hz
0.5 Hz
16 Hz
2 Hz
1 Hz
8 Hz
4 Hz
2 Hz
LAPO[0]
Bit 1
0.125 Hz
0.063 Hz
0.125 Hz
0.063 Hz
0.031 Hz
6.25 Hz
0.25 Hz
0.25 Hz
0.25 Hz
0.5 Hz
0.5 Hz
16 Hz
2 Hz
1 Hz
8 Hz
4 Hz
2 Hz
MMA8453Q
0.125 Hz
0.063 Hz
0.125 Hz
0.063 Hz
0.031 Hz
BAFRO
1.56 Hz
0.25 Hz
0.25 Hz
0.25 Hz
0.5 Hz
0.5 Hz
16 Hz
Bit 0
2 Hz
1 Hz
8 Hz
4 Hz
2 Hz
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