AK8963 Datasheet, PDF (12/18 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

6.3. Operation Modes
AK8963 has following seven operation modes:
(1) Power-down mode
(2) Single measurement mode
(3) Continuous measurement mode 1
(4) Continuous measurement mode 2
(5) External trigger measurement mode
(6) Self-test mode
(7) Fuse ROM access mode
[AK8963]
By setting CNTL1 register MODE[3:0] bits, the operation set for each mode is started.
A transition from one mode to another is shown below.
Power-down
mode
MODE[3:0]=“0001”
MODE[3:0]=“0000”
Transits automatically
Single measurement mode
Sensor is measured for one time and data is output.
Transits to Power-down mode automatically after
measurement ended.
MODE[3:0]=“0010”
MODE[3:0]=“0000”
Continuous measurement mode 1
Sensor is measured periodically in 8Hz.
Transits to Power-down mode by writing
MODE[3:0]=“0000”.
MODE[3:0]=“0110”
MODE[3:0]=“0000”
Continuous measurement mode 2
Sensor is measured periodically in 100Hz.
Transits to Power-down mode by writing
MODE[3:0]=“0000”.
MODE[3:0]=“0100”
MODE[3:0]=“0000”
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[3:0]=“0000”.
MODE[3:0]=“1000
MODE[3:0]=“0000”
Self-test mode
Sensor is self-tested and the result is output. Transits
to Power-down mode automatically.
Transits automatically
MODE[3:0]=“1111
MODE[3:0]=“0000”
Fuse ROM access mode
Turn on the circuit needed to read out Fuse ROM.
Transits to Power-down mode by writing
MODE[3:0]=“0000”.
Figure 6.1 Operation modes
When power is turned ON, AK8963 is in power-down mode. When a specified value is set to MODE[3:0],
AK8963 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 100ms(Twat)
is needed before setting another mode.
ShortDatasheet-E-01
- 12 -
2012/02