FXLS8471Q datasheet(66/75 Pages) FREESCALE

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FXLS8471Q

Sensors

Freescale Semiconductor, Inc.

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

10.12.2 OFF_Y (0x30) register

10.12.3 OFF_Z (0x31) register

Table 139. Time step for PULSE_WIND with HP_FILTER_CUTOFF[pls_hpf_en] = 0

ODR (Hz)

Max time range (s)

Time step (ms)

Normal

LPLN

High

resolution

Low power

Normal

LPLN

High

resolution

Low power

800

0.318

1.25

400

0.318

0.638

1.25

2.5

200

0.638

0.318

1.276

2.5

1.25

100

1.276

0.318

2.56

1.25

2.56

0.318

5.1

1.25

12.5

2.56

10.2

0.318

20.4

1.25

6.25

2.56

10.2

0.318

20.4

1.25

1.56

2.56

10.2

0.318

20.4

1.25

Table 140. OFF_X register

off_x[7:0]

8’b00000000

Table 141. OFF_X bit description

Field

Description

off_x[7:0]

X-axis offset correction value expressed as an 8-bit 2's complement number.

Table 142. OFF_Y register

off_y[7:0]

8’b00000000

Table 143. OFF_Y bit description

Field

Description

off_y[7:0]

Y-axis offset correction value expressed as an 8-bit 2's complement number.

Table 144. OFF_Z register

off_z[7:0]

8’b00000000

Table 145. OFF_Z bit description

Field

Description

off_z[7:0]

Z-axis offset correction value expressed as an 8-bit 2's complement number.

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