FXLS8471Q Datasheet, PDF (62/75 Pages) Freescale Semiconductor, Inc – Linear Accelerometer

10.11.2 PULSE_SRC (0x22) register
This register indicates the status bits for the pulse detection function.
Table 120. PULSE_SRC register
pls_src_ea
pls_src_axz
pls_src_axy
pls_src_axx
pls_src_dpe
pls_src_polz pls_src_poly pls_src_polx
Table 121. PULSE_SRC bit descriptions
Field
pls_src_ea
pls_src_axz
pls_src_axy
pls_src_axx
pls_src_dpe
pls_src_polz
pls_src_poly
pls_src_polx
Description
Event active flag.
0: No interrupt has been generated
1: One or more interrupt events have been generated
Z-axis event flag.
0: No interrupt.
1: Z-axis event has occurred
Y-axis event flag.
0: No interrupt.
1: Y-axis event has occurred
X-axis event flag.
0: No interrupt.
1: X-axis event has occurred.
Double pulse on first event.
0: Single-pulse event triggered interrupt.
1: Double-pulse event triggered interrupt.
Pulse polarity of Z-axis event.
0: Pulse event that triggered interrupt was positive.
1: Pulse event that triggered interrupt was negative.
Pulse polarity of Y-axis event.
0: Pulse event that triggered interrupt was positive.
1: Pulse event that triggered interrupt was negative.
Pulse polarity of X-axis event.
0: Pulse event that triggered interrupt was positive.
1: Pulse event that triggered interrupt was negative.
10.11.3 PULSE_THSX (0x23) register
Table 122. PULSE_THSX register
—
0
pls_thsx[6:0]
7’b0000000
Table 123. PULSE_THSX bit description
Field
pls_thsx[6:0]
Pulse threshold for X-axis.
Description
The PULSE_THSX, PULSE_THSY and PULSE_THSZ registers define the thresholds used by the system to start the pulse-
event detection procedure. Threshold values for each axis are unsigned 7-bit numbers with a fixed resolution of 0.063 g/LSB,
corresponding to an 8 g acceleration full-scale range. The full-scale range is fixed at 8 g for the pulse detection function,
regardless of the settings made in XYZ_DATA_CFG[fs].
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