AK09918 Datasheet, PDF (23/30 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

[AK09918]
11.3.4. HXL to HZH: Measurement Magnetic data
Addr.
Register
name
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
11h
HXL
HX7 HX6 HX5 HX4 HX3 HX2 HX1 HX0
12h
HXH
HX15 HX14 HX13 HX12 HX11 HX10 HX9 HX8
13h
HYL
HY7 HY6 HY5 HY4 HY3 HY2 HY1 HY0
14h
HYH
HY15 HY14 HY13 HY12 HY11 HY10 HY9 HY8
15h
HZL
HZ7 HZ6 HZ5 HZ4 HZ3 HZ2 HZ1 HZ0
16h
HZH
HZ15 HZ14 HZ13 HZ12 HZ11 HZ10 HZ9 HZ8
Reset
0
0
0
0
0
0
0
0
Measurement data of magnetic sensor X-axis/Y-axis/Z-axis
HXL[7:0] bits: X-axis measurement data lower 8-bit
HXH[15:8] bits: X-axis measurement data higher 8-bit
HYL[7:0] bits: Y-axis measurement data lower 8-bit
HYH[15:8] bits: Y-axis measurement data higher 8-bit
HZL[7:0] bits: Z-axis measurement data lower 8-bit
HZH[15:8] bits: Z-axis measurement data higher 8-bit
Measurement data is stored in two’s complement and Little Endian format. Measurement range of each axis
is -32752 to 32752 in 16-bit output.
Table 11.3. Measurement magnetic data format
Measurement data (each axis) [15:0] bits
Two’s complement
Hex
Decimal
Magnetic flux
density [µＴ]
0111 1111 1111 0000
|
0000 0000 0000 0001
0000 0000 0000 0000
1111 1111 1111 1111
|
1000 0000 0001 0000
7FF0
|
0001
0000
FFFF
|
8010
32752
|
1
0
-1
|
-32752
4912(max.)
|
0.15
0
-0.15
|
-4912(min.)
11.3.5. TMPS: Dummy
Addr.
Register
name
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
17h
TMPS
0
0
0
0
0
0
0
0
Reset
0
0
0
0
0
0
0
0
TMPS[7:0] bits: Dummy register.
016014242-E-00
- 23 -
2016/11