LSM303DLH Datasheet, PDF (19/47 Pages) STMicroelectronics – Sensor module: 3-axis accelerometer and 3-axis magnetometer

LSM303DLH
Functionality
By placing the mode register into single-conversion mode (0x01), two data acquisition
cycles are made on each magnetic vector.
The first acquisition is a set pulse followed shortly by measurement data of the external field.
The second acquisition has the offset strap excited in the positive bias mode to create about
a 0.6 gauss self-test field plus the external field. The first acquisition values are subtracted
from the second acquisition, and the net measurement is placed into the data output
registers.
To leave self-test mode, change the MS1 and MS0 bits of the configuration register A back
to 0x00. Also, change the mode register if single-conversion mode is not the intended next
mode of operation.
Table 7.
Symbol
Magnetic ST (positive bias)
GN bits setting
Test axis
GN bits set to 001
GN bits set to 010
GN bits set to 011
ST_M GN bits set to 100
GN bits set to 101
GN bits set to 110
GN bits set to 111⁽²⁾
X,Y axis
Z axis
X,Y axis
Z axis
X,Y axis
Z axis
X,Y axis
Z axis
X,Y axis
Z axis
X,Y axis
Z axis
X,Y axis
Z axis
1. Typical specifications are not guaranteed
Min. Typ.⁽¹⁾ Max.
Unit
655
630
495
470
395
375
270
LSB
255
235
225
200
190
140
135
Doc ID 16941 Rev 1
19/47