[AK09916]
11.3. Detailed Description of Register
11.3.1. WIA: Who I Am
Register
name
Addr.
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
00h
01h
WIA1
WIA2
0
0
1
0
0
0
0
0
1
1
0
0
0
0
0
1
WIA1[7:0] bits: Company ID of AKM. It is described in one byte and fixed value.
48h: fixed
WIA2[7:0] bits: Device ID of AK09916. It is described in one byte and fixed value.
09h: fixed
11.3.2. RSV: Reserved
Register
name
Addr.
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
02h
03h
RSV1
RSV2
RSV17 RSV16 RSV15 RSV14 RSV13 RSV12 RSV11 RSV10
RSV27 RSV26 RSV25 RSV24 RSV23 RSV22 RSV21 RSV20
RSV1[7:0] bits/ RSV2[7:0] bits: Reserved register for AKM.
11.3.3. ST1: Status 1
Register
name
Addr.
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
10h
ST1
Reset
0
0
0
0
0
0
0
0
0
0
0
0
DOR
0
DRDY
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 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. It returns to “0”
when any one of ST2 register or measurement data register (HXL to TMPS) is read.
015007392-E-02
2015/12
- 21 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
