LSM303DLH datasheet(39/47 Pages) STMICROELECTRONICS

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LSM303DLH

Registers description

Doc ID 16941 Rev 1

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The D6 - D0 bits set the minimum duration of the Interrupt 2 event to be recognized.

Duration time steps and maximum values depend on the ODR chosen.

9.2

Magnetic field sensing register description

The magnetometer core contains a set of registers which are used to control its behavior

and to retrieve magnetic field data. The register’s address, composed of 8 bits, is used to

identify them and to read/write the data through the serial interface.

For magnetic field sensing interface, the default (factory) 7-bit slave address is 00111100b

(0x3C) for write operations, or 00111101b (0x3D) for read operations.

9.2.1

CRA_REG_M (00h)

The configuration register A is used to configure the device for setting the data output rate

and measurement configuration. CRA0 through CRA7 indicate bit locations, with

CRA

denoting the bits that are in the configuration register. CRA7 denotes the first bit of the data

stream. The number in parentheses indicates the default value of that bit.

Table 56.

CRA_REG_M register

DO2

DO1DO0

MS1MS0

Table 57.

CRA_REG_M description

CRA7 to CRA5

These bits must be cleared for correct operation.

DO2 to DO0

Data output rate bits. These bits set the rate at which data is written to all three data

output registers

MS1 to MS0

Measurement configuration bits. These bits define the measurement flow of the

device, specifically whether or not to incorporate an applied bias to the sensor into

the measurement

Table 58.

CRA_REG M description

DO2

DO1

DO0

Minimum data output rate (Hz)

0.75

1.5

3.0

7.5

Not used

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