User Manual

MPU-9250 Register Map and Descriptions
Document Number: RM-MPU-9250A-00
Revision: 1.4
Release Date: 9/9/2013
5.2 Detailed Descriptions for Magnetometer Registers
This section details each register within the MPU-9250’s Magnetometer section.
5.3 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
5.4 INFO: Information
Addr
Register name
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
01H
INFO
INFO7
INFO6
INFO5
INFO4
INFO3
INFO2
INFO1
INFO0
INFO[7:0]: Device information for AKM.
5.5 ST1: Status 1
Addr
Register name
D7
D6
D5
D4
D3
D2
D1
D0
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.
DOR: Data Overrun
"0": Normal
"1": Data overrun
DOR bit turns to “1” when data has been skipped in continuous measurement mode or external trigger
measurement mode. It returns to “0” when any one of ST2 register or measurement data register
(HXL~HZH) is read.
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