FXLS8471Q Datasheet, PDF (66/75 Pages) Freescale Semiconductor, Inc – Linear Accelerometer

Table 139. Time step for PULSE_WIND with HP_FILTER_CUTOFF[pls_hpf_en] = 0
ODR (Hz)
800
400
200
100
50
12.5
6.25
1.56
Normal
0.318
0.318
0.638
1.276
2.56
2.56
2.56
2.56
Max time range (s)
LPLN
High
resolution
0.318
0.318
0.318
0.318
0.638
0.318
1.276
0.318
2.56
0.318
10.2
0.318
10.2
0.318
10.2
0.318
Low power
0.318
0.638
1.276
2.56
5.1
20.4
20.4
20.4
Normal
1.25
1.25
2.5
5
10
10
10
10
Time step (ms)
LPLN
High
resolution
1.25
1.25
1.25
1.25
2.5
1.25
5
1.25
10
1.25
40
1.25
40
1.25
40
1.25
Low power
1.25
2.5
5
10
20
80
80
80
10.12 Offset correction
The 8-bit 2’s complement offset correction registers are used to remove the sensor zero g offset on the X, Y, and Z axes after
device board mount. The resolution of the offset registers is 2 mg per LSB, with an effective offset adjustment range of -256 mg
to +254 mg for each axis.
For more information on how to calibrate the 0 g offset, please refer to Freescale application note AN4069.
10.12.1 OFF_X (0x2F) register
Table 140. OFF_X register
off_x[7:0]
8’b00000000
Table 141. OFF_X bit description
Field
off_x[7:0]
Description
X-axis offset correction value expressed as an 8-bit 2's complement number.
10.12.2 OFF_Y (0x30) register
Table 142. OFF_Y register
off_y[7:0]
8’b00000000
Table 143. OFF_Y bit description
Field
off_y[7:0]
Description
Y-axis offset correction value expressed as an 8-bit 2's complement number.
10.12.3 OFF_Z (0x31) register
Table 144. OFF_Z register
off_z[7:0]
8’b00000000
Table 145. OFF_Z bit description
Field
off_z[7:0]
Description
Z-axis offset correction value expressed as an 8-bit 2's complement number.
FXLS8471Q
66
Sensors
Freescale Semiconductor, Inc.