AK09912 Datasheet, PDF (19/42 Pages) HuaXinAn Electronics CO.,LTD – 3-axis Electronic Compass

[AK09912]
6.4.3.4. Data Skip
When Nth data was not read before (N+1)th measurement ends, Data Ready remains until data is read. In this case, a set of
measurement data is skipped so that DOR bit turns to “1”.
When data reading started after Nth measurement ended and did not finish reading before (N+1)th measurement ended, Nth
measurement data is protected to keep correct data. In this case, a set of measurement data is skipped and not stored so that
DOR bit turns to “1”.
In both case, DOR bit turns to “0” at the next start of data reading.
(N-1)th Nth
(N+1)th
PD Measurement
PD
Measurement
PD
Measurement Data Register
(N-1)th
Nth
(N+1)th
DRDY
DOR
Data read
(N-1)th Nth
PD Measurement
ST1 Data(N+1) ST2
Figure 6.7 Data Skip: When data is not read
(N+1)th
(N+2)th
PD
Measurement
PD
Measurement
PD
Measurement Data Register
(N-1)th
Nth
Data register is protected
because data is being read
(N+2)th
DRDY
Not data ready
because data is not updated
DOR
(N+1)th data is skipped
Data read
ST1 DataN
ST2
ST1 Data(N+2)
Figure 6.8 Data Skip: When data read has not been finished before the next measurement end
6.4.3.5. End Operation
Set Power-down mode (MODE[4:0]=“00000”) to end Continuous measurement mode.
MS1547-E-02
- 19 -
2014/7