AK09912 Datasheet, PDF (15/42 Pages) HuaXinAn Electronics CO.,LTD – 3-axis Electronic Compass

6.3. Operation Mode
AK09912 has following nine operation modes:
(1) Power-down mode
(2) Single measurement mode
(3) Continuous measurement mode 1
(4) Continuous measurement mode 2
(5) Continuous measurement mode 3
(6) Continuous measurement mode 4
(7) External trigger measurement mode
(8) Self-test mode
(9) Fuse ROM access mode
By setting CNTL2 register MODE[4:0] bits, the operation set for each mode is started.
A transition from one mode to another is shown below.
Power-down
mode
MODE[4:0]=“00001”
MODE[4:0]=“00000”
Transits automatically
MODE[4:0]=“00010”
MODE[4:0]=“00000”
Single measurement mode
Sensor is measured for one time and data is output.
Transits to Power-down mode automatically after
measurement ended.
Continuous measurement mode 1
Sensor is measured periodically in 10Hz.
Transits to Power-down mode by writing
MODE[4:0] = “00000”.
MODE[4:0]=“00100”
MODE[4:0]=“00000”
MODE[4:0]=“00110”
MODE[4:0]=“00000”
MODE[4:0]=“01000”
MODE[4:0]=“00000”
MODE[4:0]=“01010”
MODE[4:0]=“00000”
MODE[4:0]=“10000”
MODE[4:0]=“00000”
Transits automatically
Continuous measurement mode 2
Sensor is measured periodically in 20Hz.
Transits to Power-down mode by writing
MODE[4:0]=“00000”.
Continuous measurement mode 3
Sensor is measured periodically in 50Hz.
Transits to Power-down mode by writing
MODE[4:0]=“00000”.
Continuous measurement mode 4
Sensor is measured periodically in 100Hz.
Transits to Power-down mode by writing
MODE[4:0]=“00000”.
External trigger measurement mode
Sensor is measured for one time by external trigger.
Waits for next trigger after data is output. Transits to
Power-down mode by writing MODE[4:0]=“00000”.
Self-test mode
Sensor is self-tested and the result is output. Transits
to Power-down mode automatically.
MODE[4:0]=“11111”
MODE[4:0]=“00000”
Fuse ROM access mode
Turn on the needed to read out Fuse ROM.
Transits to Power-down mode by writing
MODE[4:0]=“00000”.
[AK09912]
Figure 6.1 Operation mode
When power is turned ON, AK09912 is in Power-down mode. When a specified value is set to MODE[4:0], AK09912
transits to the specified mode and starts operation. When user wants to change operation mode, transit to power-down mode
first and then transit to other modes. After Power-down mode is set, at least 100 µs (Twat) is needed before setting another
mode.
MS1547-E-02
- 15 -
2014/7