AK8963C Datasheet, PDF (30/38 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

[AK8963]
8.3.5. ST2: Status 2
Addr
Register
name
D7
D6
D5
D4
D3
D2
D1
D0
Read-only register
09H
ST2
Reset
0
0
0
BITM HOFL
0
0
0
0
0
0
0
0
0
0
0
HOFL: Magnetic sensor overflow
"0": Normal
"1": Magnetic sensor overflow occurred
In single measurement mode, continuous measurement mode, external trigger measurement mode and
self-test mode, magnetic sensor may overflow even though measurement data regiseter is not saturated.
In this case, measurement data is not correct and HOFL bit turns to “1”. When next measurement stars, it
returns to “0”. Refer to 6.4.3.6 for detailed information.
BITM: Output bit setting (mirror)
"0": 14-bit output
"1": 16-bit output
Mirror data of BIT bit of CNTL1 register.
ST2 register has a role as data reading end register, also. When any of measurement data register is read in
continuous measurement mode or external trigger measurement mode, it means data reading start and taken
as data reading until ST2 register is read. Therefore, when any of measurement data is read, be sure to read
ST2 register at the end.
8.3.6. CNTL1: Control1
Addr Register name D7
D6
D5
D4
D3
D2
D1
D0
Write/read register
0AH
CNTL1
0
0
0
BIT MODE3 MODE2 MODE1 MODE0
Reset
0
0
0
0
0
0
0
0
MODE[3:0]: Operation mode setting
"0000": Power-down mode
"0001": Single measurement mode
"0010": Continuous measurement mode 1
"0110": Continuous measurement mode 2
"0100": External trigger measurement mode
"1000": Self-test mode
"1111": Fuse ROM access mode
Other code settings are prohibited
BIT: Output bit setting
"0": 14-bit output
"1": 16-bit output
When each mode is set, AK8963 transits to the set mode. Refer to 6.3 for detailed information.
MS1356-E-02
- 30 -
2013/10