FXOS8700CQ datasheet(75/86 Pages) FREESCALE

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Freescale Semiconductor, Inc.

9.17.3

M_CTRL_REG3 (0x5D) register

9.17.4

M_INT_SRC (0x5E) register

m_raw

m_aslp_os[2:0]

m_ths_xyz_update

m_st_z

m_st_xy[1:0]

0b000

0b00

Figure 125. M_CTRL_REG3 register

Table 95. M_CTRL_REG3 bit descriptions

Field

Description

m_raw

Magnetic measurement RAW mode enable:

0: Values stored in the M_OFF_X/Y/Z registers are applied to the magnetic sample data. This bit must be cleared

in order for the automatic hard-iron compensation function to have any effect.

1: Values stored in M_OFF_X/Y/Z are not applied to the magnetic sample data; automatic hard-iron compensation

function does not have any effect on the output data.

m_aslp_os[2:0]

Defines magnetometer OSR in Auto-Sleep mode. See Table 95.

m_ths_xyz_update

This control bit defines which reference values are updated when the magnetic threshold event detection function

triggers.

0: X, Y and Z reference values are all updated when the function triggers on any of the X, Y, or Z axes.

: Only the reference value for the axis that triggered the detection event is updated.

m_st_z

Enables Z-axis magnetic self-test function when set to 1.

m_st_xy[1:0]

Enables both X and Y axes magnetic self-test function simultaneously when set to a value greater than 2’b00.

X and Y magnetic self-test is disabled when this field is set to 2'b00

Table 96. M-cell OSR versus ODR

ODR (Hz)

OSR = 0

OSR = 1

OSR = 2

OSR = 3

OSR = 4

OSR = 5

OSR = 6

OSR = 7

1.56

128

256

512

1024

6.25

128

256

12.5

128

224

100

222

200

222

248

400

222

224

800

222

—————

src_m_ths

src_m_vecm

src_m_drdy

00000000

Figure 126. M_INT_SRC register

Table 97. M_INT_SRC bit description

Field

Description

src_m_ths

Magnetic threshold interrupt flag:

0: Magnetic threshold event has not been detected.

1: Magnetic threshold event has been detected.

src_m_vecm

Magnetic vector magnitude interrupt flag:

0: Magnetic vector magnitude change event has not been detected.

1: Magnetic vector magnitude change event has been detected.

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