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BMX160 Datasheet(HTML) 44 Page - Bosch Sensortec GmbH

Part No. BMX160
Description  Small, low power 9-axis sensor
Download  113 Pages
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Maker  BOSCH [Bosch Sensortec GmbH]
Homepage  https://www.bosch-sensortec.com
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BMX160 Datasheet(HTML) 44 Page - Bosch Sensortec GmbH

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BMX160
Data sheet
Page 44
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.
all selected axes falls below the threshold int_high_th minus the hysteresis int_high_hy or if the
sign of the acceleration value changes. The X, Y and Z axes are enabled with the int_high_en_x,
int_high_en_y, and int_high_en_z, respectively.
When the high-g interrupt is triggered, the signals of the axis that has triggered the interrupt
(int_high_first_x, int_high_first_y, int_high_first_z) and the motion direction (int_high_sign) are set
in the Register (0x1C-0x1F) INT_STATUS.
If this interrupt is triggered in latch mode it stays blocked (disabled) until the latching is cleared.
Figure 16: Free-fall detection
2.6.9 Slow-Motion Alert / No-Motion Interrupt (Accel)
This interrupt engine monitors the slopes of each axis. The interrupt is configured in the Register
(0x5F-0x62) INT_MOTION. It behaves similar to the any-motion interrupt, but with a different set
of the parameters. As the only difference between the slow-motion interrupt and the any-motion
interrupt, the slow-motion engine does not store the information which axis has triggered the
interrupt and in which direction.
The slow-motion/no-motion interrupt engine can be configured in two modes. It can act as an
interrupt very similar to the any-motion interrupt, where the slope on the selected axis is monitored
and an interrupt is generated when a slope threshold is exceeded for a programmable number of
samples. The figure below illustrates the operation of the slow-motion interrupt engine in terms of
relevant signals and timing.
acceleration
INT
high_th
non-latched
latched
high_dur
time
high_dur
-high_th
counter
time
time


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