LSM303DLHTR Datasheet, PDF (29/47 Pages) STMicroelectronics – Sensor module: 3-axis accelerometer and 3-axis magnetometer

LSM303DLH
9
Registers description
Registers description
The device contains a set of registers which are used to control its behavior and to retrieve
acceleration data. The register address, composed of 7 bits, is used to identify them and to
write the data through the serial interface.
9.1
Linear acceleration register
For linear acceleration sensors, the default (factory) 7-bit slave address is 001100xb.
9.1.1 CTRL_REG1_A (20h)
t(s) Table 18. CTRL_REG1_A register
c _PM2
PM1
PM0
DR1
DR0
Zen
Yen
Xen
Produ _{Table 19. CTRL_REG1_A description}
lete ^{PM2 - PM0}
Power mode selection. Default value: 000
(000: Power-down; Others: refer to Table 20)
bso ^{DR1, DR0}
Data rate selection. Default value: 00
(00:50 Hz; others: refer to Table 21)
O _{Z axis enable. Default value: 1}
- _Zen
) ^{(0: Z axis disabled; 1: Z axis enabled)}
t(s ^{Y axis enable. Default value: 1}
Yen
c (0: Y axis disabled; 1: Y axis enabled)
du ^{X axis enable. Default value: 1}
Xen
ro^{(0: X axis disabled; 1: X axis enabled)}
te ^P PM bits allow selection between power-down and two operating active modes. The device is
le^{in power-down mode when the PD bits are set to “000” (default value after boot). Table 20}
o _{shows all the possible power mode configurations and respective output data rates. Output}
s _{data in the low-power modes are computed with a low-pass filter cut-off frequency defined}
Ob ^{by DR1, DR0 bits.}
DR bits, in the normal-mode operation, select the data rate at which acceleration samples
are produced. In low-power mode they define the output data resolution. Table 21 shows all
the possible configurations for the DR1 and DR0 bits.
Table 20.
PM2
0
0
Power mode and low-power output data rate configurations
PM1
PM0
Power mode selection
Output data rate [Hz]
ODR_LP
0
0
Power-down
--
0
1
Normal mode
ODR
Doc ID 16941 Rev 1
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