MMA8452Q

Sensors

Freescale Semiconductor, Inc.

23

6.2

Portrait/ Landscape Embedded Function Registers

For more details on the meaning of the different user configurable settings and for example code refer to Freescale application

note AN4068.

0x10: PL_STATUS Portrait/Landscape Status Register

This status register can be read to get updated information on any change in orientation by reading Bit 7, or on the specifics

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 Figure 3. The interrupt is cleared when reading the PL_STATUS register.

NEWLP is set to 1 after the first orientation detection after a STANDBY to ACTIVE transition, and whenever a change in LO,

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 Cutoff Options

Oversampling Mode = Normal

SEL1

SEL0

800 Hz

400 Hz

200 Hz

100 Hz

50 Hz

12.5 Hz

6.25 Hz

1.56 Hz

0

0

16 Hz

16 Hz

8 Hz

4 Hz

2 Hz

2 Hz

2 Hz

2 Hz

0

1

8 Hz

8 Hz

4 Hz

2 Hz

1 Hz

1 Hz

1 Hz

1 Hz

1

0

4 Hz

4 Hz

2 Hz

1 Hz

0.5 Hz

0.5 Hz

0.5 Hz

0.5 Hz

1

1

2 Hz

2 Hz

1 Hz

0.5 Hz

0.25 Hz

0.25 Hz

0.25 Hz

0.25 Hz

Oversampling Mode = Low Noise Low Power

0

0

16 Hz

16 Hz

8 Hz

4 Hz

2 Hz

0.5 Hz

0.5 Hz

0.5 Hz

0

1

8 Hz

8 Hz

4 Hz

2 Hz

1 Hz

0.25 Hz

0.25 Hz

0.25 Hz

1

0

4 Hz

4 Hz

2 Hz

1 Hz

0.5 Hz

0.125 Hz

0.125 Hz

0.125 Hz

1

1

2 Hz

2 Hz

1 Hz

0.5 Hz

0.25 Hz

0.063 Hz

0.063 Hz

0.063 Hz

Oversampling Mode = High Resolution

0

0

16 Hz

16 Hz

16 Hz

16 Hz

16 Hz

16 Hz

16 Hz

16 Hz

0

1

8Hz

8Hz

8Hz

8Hz

8Hz

8 Hz

8Hz

8Hz

1

0

4Hz

4Hz

4Hz

4Hz

4Hz

4 Hz

4Hz

4Hz

1

1

2 Hz

2 Hz

2 Hz

2 Hz

2 Hz

2 Hz

2 Hz

2 Hz

Oversampling Mode = Low Power

0

0

16 Hz

8 Hz

4 Hz

2 Hz

1 Hz

0.25 Hz

0.25 Hz

0.25 Hz

0

1

8 Hz

4 Hz

2 Hz

1 Hz

0.5 Hz

0.125 Hz

0.125 Hz

0.125 Hz

1

0

4 Hz

2 Hz

1 Hz

0.5 Hz

0.25 Hz

0.063 Hz

0.063 Hz

0.063 Hz

1

1

2 Hz

1 Hz

0.5 Hz

0.25 Hz

0.125 Hz

0.031 Hz

0.031 Hz

0.031 Hz

0x10: PL_STATUS Register (Read Only)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

NEWLP

LO

0

0

0

LAPO[1]

LAPO[0]

BAFRO

Table 19. PL_STATUS Register Description

NEWLP

Landscape/Portrait status change flag. Default value: 0.

0: No change, 1: BAFRO and/or LAPO and/or Z-Tilt lockout value has changed

LO

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.

1. The default power up state is BAFRO = 0, LAPO = 0, and LO = 0.

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.

BAFRO

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.