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BMX160 Datasheet(HTML) 38 Page - Bosch Sensortec GmbH

Part No. BMX160
Description  Small, low power 9-axis sensor
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Maker  BOSCH [Bosch Sensortec GmbH]
Homepage  https://www.bosch-sensortec.com
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BMX160 Datasheet(HTML) 38 Page - Bosch Sensortec GmbH

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BMX160
Data sheet
Page 38
BST-BMX160-DS000-12 | Revision 1.2 | January 2019
Bosch Sensortec
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third
parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Note: Specifications within this document are preliminary and
subject to change without notice.
Note that the sensor measures the direction of the force which needs to be applied to keep the
sensor at rest (i.e. opposite direction than g itself).
Looking at the phone from front side / portrait upright corresponds to the following angles:
���� = 90° , ���� = 270°
The orientation value is stored in the output register int_orient in Register (0x1C-0x1F)
INT_STATUS. There are three orientation calculation modes: symmetrical, high-asymmetrical
and low-asymmetrical. The mode is selected by the register int_orient_mode in Register (0x65-
0x66) INT_ORIENT as follows:
Table 18: Orientation mode
orient_mode
Orientation mode
00
Symmetrical
01
High asymmetrical
10
Low asymmetrical
11
Symmetrical
The register int_orient has the following meanings depending on the switching mode:
Table 19: Symmetrical mode
Orient
Name
Angle
Condition
x00
Landscape left
315°<phi<45°
|acc_y/acc_x|<1 && acc_x≥0
x01
Landscape right
135°<phi<225°
|acc_y/acc_x|<1 && acc_x<0
x10
Portrait upside down
45°<phi<135°
|acc_y/acc_x|≥1 && acc_y<0
x11
Portrait upright
225°<phi<315°
|acc_y/acc_x|≥1 && acc_y≥0
Table 20: High asymmetrical mode
Orient
Name
Angle
Condition
x00
Landscape left
297°<phi<63°
|acc_y/acc_x|<2 && acc_x≥0
x01
Landscape right
117°<phi<243°
|acc_y/acc_x|<2 && acc_x<0
x10
Portrait upside down
63°<phi<117°
|acc_y/acc_x|≥2 && acc_y<0
x11
Portrait upright
243°<phi<297°
|acc_y/acc_x|≥2 && acc_y≥0
Table 21: Low asymmetrical mode
Orient
Name
Angle
Condition
x00
Landscape left
333°<phi<27°
|acc_y/acc_x|<0.5 && acc_x≥0
x01
Landscape right
153°<phi<207°
|acc_y/acc_x|<0.5 && acc_x<0
x10
Portrait upside down
27°<phi<153°
|acc_y/acc_x|≥0.5 && acc_y<0
x11
Portrait upright
207°<phi<333°
|acc_y/acc_x|≥0.5 && acc_y≥0


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