BMA253
Data sheet
Page 30
4.7.5.1 Enabling (disabling) for each axis
Any-motion detection can be enabled (disabled) for each axis separately by writing ´1´ (´0´) to
bits (0x16) slope_en_x, (0x16) slope_en_y, (0x16) slope_en_z. The criteria for any-motion
detection are fulfilled and the slope interrupt is generated if the slope of any of the enabled axes
exceeds the threshold (0x28) slope_th for [(0x27) slope_dur +1] consecutive times. As soon as
the slopes of all enabled axes fall or stay below this threshold for [(0x27) slope_dur +1]
consecutive times the interrupt is cleared unless interrupt signal is latched.
4.7.5.2 Axis and sign information of slope / any motion interrupt
The interrupt status is stored in bit (0x09) slope_int. The any-motion interrupt supplies additional
information about the detected slope. The axis which triggered the interrupt is given by that one
of bits (0x0B) slope_first_x, (0x0B) slope_first_y, (0x0B) slope_first_z that contains a value of
´1´. The sign of the triggering slope is held in bit (0x0B) slope_sign until the interrupt is
retriggered. If (0x0B) slope_sign = ´0´ (´1´), the sign is positive (negative).
BST-BMA253-DS000-01 | Revision 1.0 | August 2015
Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
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