FXOS8700CQ datasheet(26/86 Pages) FREESCALE

26 / 86 page

Sensors

Freescale Semiconductor, Inc.

NOTE

Auto-increment addresses which are not a simple increment are highlighted in bold. The auto-increment addressing is only enabled when

registers are read using burst read mode when configured for I2C or SPI. The auto-increment address is cleared in I2C mode when a stop

condition is detected. In SPI mode there is no stop condition and the address is not cleared.

M_VECM_CNT

R/W

0x6C

0x00

Magnetic vector

magnitude debounce

count

M_VECM_INITX_MSB

R/W

0x6D

0x00

Magnetic vector

magnitude reference

value X-axis MSB

M_VECM_INITX_LSB

R/W

0x6E

0x00

Magnetic vector

magnitude reference

value X-axis LSB

M_VECM_INITY_MSB

R/W

0x6F

0x00

Magnetic vector

magnitude reference

value Y-axis MSB

M_VECM_INITY_LSB

R/W

0x70

0x00

Magnetic vector

magnitude reference

value Y-axis LSB

M_VECM_INITZ_MSB

R/W

0x71

0x00

Magnetic vector

magnitude reference

value Z-axis MSB

M_VECM_INITZ_LSB

R/W

0x72

0x00

Magnetic vector

magnitude reference

value Z-axis LSB

A_FFMT_THS_X_MSB

R/W

0x73

0x00

X-axis FMT threshold

MSB

A_FFMT_THS_X_LSB

R/W

0x74

0x00

X-axis FFMT threshold

LSB

A_FFMT_THS_Y_MSB

R/W

0x75

0x00

Y-axis FFMT threshold

MSB

A_FFMT_THS_Y_LSB

R/W

0x76

0x00

Y-axis FFMT threshold

LSB

A_FFMT_THS_Z_MSB

R/W

0x77

0x00

Z-axis FFMT threshold

MSB

A_FFMT_THS_Z_LSB

R/W

0x78

0x00

Z-axis FFMT threshold

LSB

Reserved (do not modify)

0x7D

—

Reserved. Reads return

0x00.

1. Register contents are preserved when transitioning from Active to Standby mode.

2. Register contents are reset when transitioning from Standby to Active mode.

3. Register contents can be modified anytime in Standby or Active mode. A write to this register will cause a reset of the corresponding internal

system debounce counter.

4. Modification of this register’s contents can only occur when device is in Standby mode, except the FS[1:0] bit fields in CTRL_REG1 register

. Hybrid

auto-increment mode may be used to read out acceleration and magnetic data from registers x1-x6 using a burst read transaction. When

M_CTRL_REG2[hyb_autoinc_mode] = 1, the user may do a burst read of 12 bytes starting from OUT_X_MSB (address 0x1) to read out both the

current accelerometer and magnetometer data in one contiguous operation.

5. To ensure that valid data is read from these registers, the user must first read the M_OUT_X_MSB register in either burst or single-read mode.

Reading of the M_OUT_X_MSB register triggers the update of the M_OUT_X/Y/Z registers with the current time-aligned output data.

6. To ensure that valid data is read from these registers, the user must first read the MSB register of each register pair in either burst or single-read

mode. Reading of the LSB register without first reading the MSB register will result in invalid data.

Table 14. Register Address Map

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