MMA8652FC datasheet(33/65 Pages) NXP

33 / 65 page

MMA8652FC

Sensors

Freescale Semiconductor, Inc.

6.7

Portrait/Landscape configuration and status registers

For more information about the different user-configurable settings and example code, see application note AN4083, Data

Manipulation and Basic Settings for Xtrinsic MMA865xFC Accelerometers.

6.7.1

0x10: PL_STATUS Portrait/Landscape Status register

To get updated information on any change in orientation, read the Portrait/Landscape Status register (read Bit 7, or read the other

bits for more orientation data). For more about Portrait Up, Portrait Down, Landscape Left, Landscape Right, Back, and Front

orientations, see Figure 6. The interrupt is cleared when reading the PL_STATUS register.

•

The orientation mechanism state change is limited to a maximum 1.25 g.

The current position is locked if the absolute value of the acceleration experienced on any of the three axes is greater than

1.25 g.

•

LAPO, BAFRO, and LO continue to change when NEWLP is set.

Table 34. 0x10 PL_STATUS Register (Read-Only)

Back to Register Address Map

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

NEWLP

—

LAPO[1]

LAPO[0]

BAFRO

Table 35. PL_STATUS register

Bit(s)

Field

Description

7NEWLP

Landscape/Portrait status change flag

• 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.

0 No change (default)

1 BAFRO and/or LAPO and/or Z-Tilt lockout value has changed

6LO

Z-Tilt Angle Lockout

0 Lockout condition has not been detected (default)

1 Z-Tilt lockout trip angle has been exceeded.

Lockout has been detected.

5–3

—

Can be 0 or 1.

2–1

LAPO[1:0](1)

1. The default power-up state is BAFRO = 0, LAPO = 00, and LO = 0.

Landscape/Portrait orientation

00 Portrait Up: Equipment standing vertically in the normal orientation (default)

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

0 Front: Equipment is in the front-facing orientation (default)

1 Back: Equipment is in the back-facing orientation

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