ADXL346ACCZ-R2 datasheet(28/40 Pages) AD

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ADXL346

Data Sheet

2D_ORIENT

3D_ORIENT

Vx Bits

These bits show the validity of the 2D (V2) and 3D (V3) orienta-

tions. A value of 1 corresponds to the orientation being valid. A

value of 0 means that the orientation is invalid because the current

orientation is in the dead zone.

xD_ORIENT Bits

These bits represent the current 2D (2D_ORIENT) and 3D

(3D_ORIENT) orientations of the accelerometer. If the orien-

tation interrupt is enabled, this register is read to determine the

orientation of the device when the interrupt occurs. Because this

should be read at the time of the orientation interrupt to ensure

that the orientation change that caused the interrupt has been

identified. Orientation values are shown in Table 25 and Table 26.

See the Orientation Sensing section for more details.

Writing to the BW_RATE register (Address 0x2C) or placing

the part into standby mode resets the orientation feature, clearing

the orientation filter and the orientation status. An orientation

interrupt (if enabled) results from these actions if the orientation

during the next output sample is different from the default

value (+X for 2D orientation detection and undefined for 3D

orientation).

Table 25. 2D Orientation Codes

Decimal

Binary

Orientation

Dominant Axis

Portrait positive

Portrait negative

−X

Landscape positive

Landscape negative

−Y

Table 26. 3D Orientation Codes

Decimal

Binary

Orientation

Dominant Axis

011

Front

100

Back

−X

010

Left

101

Right

−Y

001

Top

110

Bottom

−Z

Rev. C | Page 28 of 40

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