FUNCTIONAL SPECIFICATIONS (Continued)

Offset calibration function

-This function is enable when the control register (CNTL3:OCL) was set to Hi during the Force State.

-The offset value for inner ADC output is calculated with the measured sensor offset, and then

set compensation values for the amplitude offset and also the digital offset automatically.

-The OCL bit is changed to be low after updating the compensation offset value, and then the status

is back to before measurement.

Offset drift function

-This function can make the digital compensation output that is add with values wrote by

the host CPU on the offset drift register (OFFX,OFFY,OFFZ).

-Offset drift values can be set with 15bit signed value.

Temperature Measurement and Compensation Function

- The temperature measurement function will be executed when the register command TCS is set "1"

during the Force State. After measurement, TCS bit change to "0" and back to before measurement.

-The measurement result is wet on the temperature value register (TEMP).

-Sensor output values are compensated with the temperature value register(TEMP)

-After temperature measurement, the status register TRDY (STAT1) change to"1". This register is

cleared by reading the TEMP register. And the status of temperature measurement Active/inactive can be

output on the external DRDY Pin with setting the bit DRTS at the control register CTRL2.

Geomagnetic Sensor

9 / 32

HSCDTD008A

Rev.2.5

Aug. 2016

Confidential

オフセットドリフト値

センサ出力値

センサ出力値

＋

オフセットドリフト値

Sensor

Output

value

+

Sensor

Output

value

offset

drift

value