LSM6DB0 datasheet(21/66 Pages) STMICROELECTRONICS

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LSM6DB0

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

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.

Accelerometer

Only

Accelerometer

Gyro

Power Down

Write CTRL_REG1_G

With CTRL_REG6_XL = PD

Write CTRL_REG6_XL

LSM6DB0 数据表(PDF) 21 Page - STMicroelectronics

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