BMA253
Data sheet
Page 33
4.7.6.4 Axis and sign information of tap sensing
The sign of the slope of the first tap which triggered the interrupt is stored in bit (0x0B) tap_sign
(´0´ means positive sign, ´1´ means negative sign). The value of this bit persists after clearing
the interrupt.
The axis which triggered the interrupt is indicated by bits (0x0B) tap_first_x, (0x0B) tap_first_y,
and (0x0B) tap_first_z.
The bit corresponding to the triggering axis contains a ´1´ while the other bits hold a ´0´. These
bits are cleared together with clearing the interrupt status.
4.7.6.5 Tap sensing in low power mode
In low-power mode, a limited number of samples is processed after wake-up to decide whether
an interrupt condition is fulfilled. The number of samples is selected by bits (0x2B) tap_samp
according to Table 12.
Table 12: Meaning of (0x2B) tap_samp
(0x2B)
Number of Samples
tap_samp
00b
01b
10b
11b
2
4
8
16
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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