LSM6DSV datasheet(29/187 Pages) STMICROELECTRONICS

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Functionality

6.1

Operating modes

In the LSM6DSV, the accelerometer and the gyroscope can be turned on/off independently of each other and are

allowed to have different ODRs and power modes.

The LSM6DSV has three operating modes available:

•

only accelerometer active and gyroscope in power-down

•

only gyroscope active and accelerometer in power-down

•

both accelerometer and gyroscope sensors active with independent ODR and power mode

The accelerometer is activated from power-down by writing ODR_XL_[3:0] in CTRL1 (10h) while the gyroscope

is activated from power-down by writing ODR_G_[3:0] in CTRL2 (11h). For combo mode the ODRs are totally

independent.

6.2

Accelerometer power modes

In the LSM6DSV, the accelerometer can be configured in five different operating modes: power-down mode,

low-power mode (1, 2, 3), normal mode, high-performance mode and high-accuracy ODR mode.

The operating mode selected depends on the value of the OP_MODE_XL_[2:0] bits in CTRL1 (10h).

If the value of the OP_MODE_XL_[2:0] bits is 000 (default), high-performance mode is valid for all ODRs (from

7.5 Hz up to 7.68 kHz).

Normal mode is available for ODR values from 7.5 Hz to 1.92 kHz and it is enabled by setting the

OP_MODE_XL_[2:0] bits to 111. Normal mode cannot be used in mode 3 connection mode.

In high-performance mode and in normal mode the analog anti-aliasing filter is active.

Low-power mode is available for lower ODRs (1.875 Hz, 15 Hz, 30 Hz, 60 Hz, 120 Hz, 240 Hz). The three

low-power modes are enabled by setting OP_MODE_XL_[2:0] to 100 (LPM1), 101 (LPM2), 110 (LPM3).

High-accuracy ODR mode is available for ODR values from 15 Hz up to 7.68 kHz and it is enabled by setting the

OP_MODE_XL_[2:0] bits to 001. Refer to Section 6.5 High-accuracy ODR mode for more details.

The embedded functions based on accelerometer data (free-fall, 6D/4D, tap/double-tap, wake-up, activity/

inactivity, stationary/motion, step counter, step detection, significant motion, tilt) and the FIFO batching

functionality are supported in all modes.

LSM6DSV

Functionality

DS13476 - Rev 2

page 29/187

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