AK09912 Datasheet, PDF (31/42 Pages) HuaXinAn Electronics CO.,LTD – 3-axis Electronic Compass

8.3. Detailed of Description of Register
[AK09912]
8.3.1. WIA: Who I Am
Addr.
Register
name
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
00H WIA1
0
1
0
0
1
0
0
0
01H WIA2
0
0
0
0
0
1
0
0
WIA1[7:0]: Company ID of AKM. It is described in one byte and fixed value.
48H: fixed
WIA2[7:0]: Device ID of AK09912. It is described in one byte and fixed value.
04H: fixed
8.3.2. RSV: Reserved
Addr.
02H
03H
Register
name
D7
RSV1 RSV17
RSV2 RSV27
D6
RSV16
RSV26
D5
D4
D3
Read-only register
RSV15 RSV14 RSV13
RSV25 RSV24 RSV23
D2
RSV12
RSV22
D1
RSV11
RSV21
D0
RSV10
RSV20
RSV1[7:0]/RSV2[7:0]: Device information of AKM.
8.3.3. ST1: Status 1
Addr.
Register
name
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
10H
ST1 HSM
0
0
0
0
0
DOR 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, Continuous measurement mode 1, 2, 3, 4 , External
trigger measurement mode or Self-test mode. It returns to “0” when any one of ST2 register or measurement data register
(HXL to TMPS) is read.
DOR: Data Overrun
“0”: Normal
“1”: Data overrun
DOR bit turns to “1” when data has been skipped in Continuous measurement mode 1,2,3,4 or External trigger
measurement mode. It returns to “0” when any one of ST2 register or measurement data register (HXL to TMPS) is read.
HSM: I²C Hs-mode
“0”: Standard/Fast mode
“1”: Hs-mode
HSM bit turns to “1” when I²C bus interface is changed from Standard or Fast mode to High-speed mode (Hs-mode).
MS1547-E-02
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2014/7