AK8975 Datasheet, PDF (25/34 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

8.3.4. HXL to HZH: Measurement Data
Addr Register name D7
D6
Read-only register
03H
HXL
HX7 HX6
04H
HXH
HX15 HX14
05H
HYL
HY7 HY6
06H
HYH
HY15 HY14
07H
HZL
HZ7 HZ6
08H
HZH
HZ15 HZ14
Reset
0
0
D5
HX5
HX13
HY5
HY13
HZ5
HZ13
0
D4
HX4
HX12
HY4
HY12
HZ4
HZ12
0
D3
HX3
HX11
HY3
HY11
HZ3
HZ11
0
D2
HX2
HX10
HY2
HY10
HZ2
HZ10
0
[AK8975/C]
D1
D0
HX1 HX0
HX9 HX8
HY1 HY0
HY9 HY8
HZ1 HZ0
HZ9 HZ8
0
0
Measurement data of magnetic sensor X-axis/Y-axis/Z-axis
HXL[7:0]: X-axis measurement data lower 8bit
HXH[15:8]: X-axis measurement data higher 8bit
HYL[7:0]: Y-axis measurement data lower 8bit
HYH[15:8]: Y-axis measurement data higher 8bit
HZL[7:0]: Z-axis measurement data lower 8bit
HZH[15:8]: Z-axis measurement data higher 8bit
Measuremnet data is stored in two’s complement and Little Endian format. Measurement range of each
axis is from -4096 to +4095 in decimal.
Measurement data (each axis) [15:0]
Two’s complement
Hex
Decimal
0000 1111 1111 1111
0FFF
4095
|
|
|
0000 0000 0000 0001
0001
1
0000 0000 0000 0000
0000
0
1111 1111 1111 1111
FFFF
-1
|
|
|
1111 0000 0000 0000
F000
-4096
Table 8.3 Measurement data format
Magnetic flux
density [µT]
1229(max.)
|
0.3
0
-0.3
|
-1229(min.)
MS1187-E-02
- 25 -
2010/05