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AK8975 Fiches technique(PDF) 28 Page - Asahi Kasei Microsystems

No de pièce AK8975
Description  3-axis Electronic Compass
PDF  34 Pages
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Fabricant  AKM [Asahi Kasei Microsystems]
Site Internet  http://www.akm.com
Logo AKM - Asahi Kasei Microsystems

AK8975 Fiches technique(HTML) 28 Page - Asahi Kasei Microsystems

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[AK8975/C]
8.3.11.
ASAX, ASAY, ASAZ: Sensitivity Adjustment values
Addr
Register
name
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
10H
ASAX
COEFX7 COEFX6 COEFX5 COEFX4 COEFX3 COEFX2 COEFX1 COEFX0
11H
ASAY
COEFY7 COEFY6 COEFY5 COEFY4 COEFY3 COEFY2 COEFY1 COEFY0
12H
ASAZ
COEFZ7 COEFZ6 COEFZ5 COEFZ4 COEFZ3 COEFZ2 COEFZ1 COEFZ0
Reset
-
-
-
-
-
-
-
-
Sensitivity adjustment data for each axis is stored to fuse ROM on shipment.
ASAX[7:0]: Magnetic sensor X-axis sensitivity adjustment value
ASAY[7:0]: Magnetic sensor Y-axis sensitivity adjustment value
ASAZ[7:0]: Magnetic sensor Z-axis sensitivity adjustment value
<How to adjust sensitivity>
The sensitivity adjustment is done by the equation below;
()
⎟
⎠
⎞
⎜
⎝
⎛
+
×
−
×
=
1
128
5
.
0
128
ASA
H
Hadj
,
where H is the measurement data read out from the measurement data register, ASA is the sensitivity
adjustment value, and Hadj is the adjusted measurement data.
MS1187-E-02
- 28 -
2010/05



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