LSM6DB0 Datasheet, PDF (21/66 Pages) STMicroelectronics – 3D accelerometer, 3D gyroscope and signal processor

LSM6DB0
6
Device operating modes
Device operating modes
6.1
Accelerometer and gyroscope operating modes
The LSM6DB0 has two operating modes available: only accelerometer active and
gyroscope in power down or both accelerometer and gyroscope sensors active at the same
ODR. Switching from one mode to the other requires one write operation: writing to
CTRL_REG6_XL (20h) the accelerometer operates in normal mode and the gyroscope is
powered down, writing to CTRL_REG1_G (10h) both the accelerometer and gyroscope are
activated at the same ODR.
Figure 6 depicts both modes of operation from power down.
Figure 6. Switching operating modes
Write CTRL_REG6_XL
Accelerometer
Only
Write CTRL_REG1_G
Power Down
Write CTRL_REG1_G
With CTRL_REG6_XL = PD
Accelerometer
+
Gyro
6.2
Gyroscope power modes
In the LSM6DB0, the gyroscope can be configured in three different operating modes:
power-down, low-power and normal mode.
Low-power mode is available for lower ODR (14.9, 59.5, 119 Hz) while for greater ODR
(238, 476, 952 Hz), the device is automatically in normal mode. Table 8 summarizes the
ODR configuration (ODR_G[2:0] bits set in CTRL_REG1_G (10h)) and corresponding
power modes.
To enable low-power mode, the LP_mode bit in CTRL_REG3_G (12h) has to be set to ‘1’.
Low-power mode allows reaching low power consumption while maintaining the device
always on, refer to Table 9.
The turn-on time to change from all operating modes for the gyroscope and accelerometer
is indicated in Table 10 and Table 11.
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