Sensors

Freescale Semiconductor

16

MAG3110

5.5.2

CTRL_REG2 (0x11)

1

1

0

1

0

0.31

4

17.2

0.07

1

1

0

1

1

0.16

8

17.2

0.05

1

1

1

0

0

0.63

1

8.6

0.14

1

1

1

0

1

0.31

2

8.6

0.1

1

1

1

1

0

0.16

4

8.6

0.07

1

1

1

1

1

0.08

8

8.6

0.05

Table 31. CTRL_REG2 Register

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

AUTO_MRST_EN

—

RAW

Mag_RST

—

ST_Z

ST_Y

ST_X

Table 32. CTRL_REG2 Description

AUTO_MRST_EN

Automatic Magnetic Sensor Reset. Default value: 0.

0: Automatic magnetic sensor resets off.

1: Automatic magnetic sensor resets on.

Similar to Mag_RST, however, the resets occur before each data acquisition.

RAW

Data output correction. Default value: 0.

0: Normal mode: data values are corrected by the user offset register values.

1: Raw mode: data values are not corrected by the user offset register values.

The factory calibration is always applied to the measured data stored in registers 0x01 to 0x06 irrespective of the setting

of the RAW bit.

Mag_RST

Magnetic Sensor Reset. Default value: 0.

0: Reset cycle not active.

1: Reset cycle initiate or Reset cycle busy/active.

When asserted, initiates a magnetic sensor reset cycle that will restore correct operation after exposure to an excessive

magnetic field which exceeds the Full Scale Range (see Table 2) but is less than the Maximum Applied Magnetic Field

(see Table 3).

When the cycle is finished, value returns to 0.

ST_Z

Self-test Z-axis Default value: 0.

0: No Self-test.

1: Self-test, active Z-axis.

When this bit is asserted, a magnetic field is generated on the MAG3110 Z-axis to test the operation of this axis. The size

of the resulting change is defined as Self-test Output Change in Table 2. The ST_Z bit should be de-asserted at the end

of the self-test.

ST_Y

Self-test Y-axis. Default value: 0.

0: No Self-test.

1: Self-test, active Y-axis.

When this bit is asserted, a magnetic field is generated on the MAG3110 Y-axis to test the operation of this axis. The size

of the resulting change is defined as Self-test Output Change in Table 2. The ST_Y bit should be de-asserted at the end

of the self-test.

ST_X

Self-test X-axis. Default value: 0.

0: No Self-test.

1: Self-test, active X-axis.

When this bit is asserted, a magnetic field is generated on the MAG3110 X-axis to test the operation of this axis. The size

of the resulting change is defined as Self-test Output Change in Table 2. The ST_X bit should be de-asserted at the end

of the self-test.

Table 30. Over Sampling Ratio and Data Rate Description