AN4602

General configuration

2

General configuration

Various features of the LIS3MDL can be configured by using CTRL_REG1, CTRL_REG2,

CTRL_REG3 and CTRL_REG4.

•

Output data rate (ODR)

−

Register CTRL_REG1; bits DO2, DO1, DO0, FAST_ODR

•

Operating modes

−

Register CTRL_REG1: bits OM1, OM0

−

Register CTRL_REG4: bits OMZ1, OMZ0

•

Full-scale

−

Register CTRL_REG2: bits FS1, FS0

•

Measurement mode

−

Mode register (CTRL_REG3): bits MD1, MD0

2.1

Full scale

The LIS3MDL provides a selectable full scale to adjust the input dynamic range of the

device to the amplitude of the magnetic field to be measured.

Full-scale configuration is selected by setting bits FS1, FS0 (register CTRL_REG2).

Table 2: Full-scale selection

FS1

FS0

Full-scale [G]

Gain@16-bit (LSB/G)

0

0

±4

6842

0

1

±8

3421

1

0

±12

2281

1

1

±16

1711

2.2

Operating modes

The LIS3DML allows four possible operating modes: low-power, medium-performance,

high -performance and ultra-high-performance.

Operating modes on the X/Y axes can be chosen independently from the operating mode

on the Z-axis:

•

X/Y axes operating mode can be selected by setting bits OM1, OM0 (register

CTRL_REG1)

•

Z-axis operating mode by using bits OMZ1, OMZ0 (register CTRL_REG4)

Table 3: X/Y axes operating mode selection

Operating mode

OM1

OM0

Low-power

0

0

Medium-performance

0

1

High-performance

1

0

Ultra-high-performance

1

1

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