LSM320HAY30 Datasheet, PDF (28/42 Pages) STMicroelectronics – MEMS motion sensor module: 3D digital accelerometer and 2D pitch and yaw analog gyroscope

Register description
8
Register description
LSM320HAY30
The device contains a set of registers which are used to control acceleration portion
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.
8.1
WHO_AM_I (0Fh)
Table 15. WHO_AM_I register
0
0
1
1
0
0
1
0
This register is the device identification register, and contains the device identifier which, for
the LSM320HAY30, is set to 32h.
8.2
LA_CTRL_REG1 (20h)
Table 16. LA_CTRL_REG1 register
PM2
PM1
PM0
DR1
DR0
Zen
Yen
Xen
Table 17. LA_CTRL_REG1 description
PM2 - PM0
Power mode selection. Default value: 000
(000: Power-down; Others: refer to Table 18)
DR1, DR0
Data rate selection. Default value: 00
(00:50 Hz; others: refer to Table 19)
Z axis enable. Default value: 1
Zen
(0: Z axis disabled; 1: Z axis enabled)
Y axis enable. Default value: 1
Yen
(0: Y axis disabled; 1: Y axis enabled)
X axis enable. Default value: 1
Xen
(0: X axis disabled; 1: X axis enabled)
PM bits allow selection between power-down and two operating active modes. The device is
in power-down mode when the PD bits are set to “000” (default value after boot). Table 18
shows all the possible power mode configurations and respective output data rates. Output
data in the low-power modes are computed with a low-pass filter cut-off frequency defined
by DR1, DR0 bits.
DR bits, in normal mode operation, select the data rate at which acceleration samples are
produced. In low-power mode they define the output data resolution. Table 19 shows all the
possible configurations for the DR1 and DR0 bits.
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