FXLS8471Q Datasheet, PDF (48/75 Pages) Freescale Semiconductor, Inc – Linear Accelerometer

10.7.4 PL_BF_ZCOMP (0x13) register
Back/Front and Z-tilt angle compensation register
Table 66. PL_BF_ZCOMP register
bkfr[1:0]
2’b10
—
—
—
0
0
0
zlock[2:0]
3’b100
Table 67. PL_BF_ZCOMP bit descriptions
Field
zlock[2:0]
bkfr[1:0]
Description
Z-lock angle threshold. range is from approximately 13° to 44°. Step size is approximately 4°. See Table 68 for more information.
Default value: 0x04 → ∼28°.
Maximum value: 0x07 → ~44°.
Back/front trip angle threshold. See Table 69 for more information.
Default: 2’b10 → ±70°. Step size is 5°.
Range: ±(65° to 80°).
Table 68. Z-lockout angle definitions
zlock
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
Resultant angle (min) for positions
between Landscape and Portrait
13.6°
17.1°
20.7°
24.4°
28.1°
32.0°
36.1°
40.4°
Resultant angle (max) for
ideal Landscape or Portrait
14.5°
18.2°
22.0°
25.9°
30.0°
34.2°
38.7°
43.4°
Table 69. Back/Front orientation definitions
bkfr
Back → Front Transition
00
Z < 80° or Z > 280°
01
Z < 75° or Z > 285°
10
Z < 70° or Z > 290°
11
Z < 65° or Z > 295°
Front → Back Transition
Z > 100° and Z < 260°
Z > 105° and Z < 255°
Z > 110° and Z < 250°
Z > 115° and Z < 245°
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