AK8975 Datasheet, PDF (24/34 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

8.3. Detailed Description of Registers
[AK8975/C]
8.3.1. WIA: Device ID
Addr
Register
name
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
00H
WIA
0
1
0
0
1
0
0
0
Device ID of AKM. It is described in one byte and fixed value.
48H: fixed
8.3.2. INFO: Information
Register
Addr
D7
name
Read-only register
01H
INFO
INFO7
D6
INFO6
D5
INFO5
D4
INFO4
D3
INFO3
D2
INFO2
D1
INFO1
D0
INFO0
INFO[7:0]: Device information for AKM.
8.3.3. ST1: Status 1
Register
Addr
D7
D6
D5
D4
D3
D2
D1
D0
name
Read-only register
02H
ST1
0
0
0
0
0
0
0
DRDY
Reset
0
0
0
0
0
0
0
0
DRDY: Data Ready
"0": Normal
"1": Data is ready
DRDY bit turns to “1” when data is ready in single measurement mode or self-test mode. It returns to “0”
when any one of ST2 register or measurement data register (HXL to HZH) is read.
MS1187-E-02
- 24 -
2010/05