[AK09916]
(N-1)th Nth
(N+1)th
(N+2)th
Measurement
Measurement
Measurement
PD
PD
PD
PD
Measurement Data Register
(N-1)th
Nth
(N+2)th
Data register is protected
because data is being read
Not data ready
DRDY
because data is not updated
(N+1)th data is skipped
DOR
Data read
ST1 DataN
ST2
ST1 Data(N+2)
Figure 9.8. Data Skip: When data read has not been finished before the next measurement end
9.4.3.5. End Operation
Set Power-down mode (MODE[4:0] bits = “00000”) to end Continuous measurement mode.
9.4.3.6. Magnetic Sensor Overflow
AK09916 has the limitation for measurement range that the sum of absolute values of each axis should be
smaller than 4912 μT. (Note 8)
|X|+|Y|+|Z| < 4912 μT
When the magnetic field exceeded this limitation, data stored at measurement data are not correct. This is
called Magnetic Sensor Overflow.
When magnetic sensor overflow occurs, HOFL bit turns to “1”.
When measurement data register (HXL to HZH) is updated, HOFL bit is updated.
(Note 8) BRG: 0.15μT/LSB
015007392-E-02
2015/12
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AKM [ ASAHI KASEI MICROSYSTEMS ]
