LSM6DST datasheet(52/180 Pages) STMICROELECTRONICS

52 / 180 page

Functionality

LSM6DST

52/180

DocID033525 Rev 2

Mode 3 / Mode 4 (for OIS and EIS functionality)

Figure 20. Gyroscope digital chain - Mode 3 / Mode 4 (OIS/EIS)

1. When Mode3/4 is enabled, the LPF1 filter is not available in the gyroscope UI chain.

2. It is recommended to avoid using the LPF1 filter in Mode1/2 when Mode3/4 is intended to be used.

3. HP_EN_OIS can be used to select the HPF on the OIS path only if the HPF is not used in the UI chain. If

both the HP_EN_G bit and HP_EN_OIS bit are set to 1, the HP filter is applied to the UI chain only.

The auxiliary interface needs to be enabled in UI_CTRL1_OIS (70h) / SPI2_CTRL1_OIS

(70h).

In Mode 3/4 configuration, there are two paths:



the chain for User Interface (UI) where the ODR is selectable from 12.5 Hz up to

6.66 kHz



the chain for OIS/EIS where the ODR is at 6.66 kHz and the LPF1 is available. The

LPF1 configuration depends on the setting of the FTYPE_[1;0] _OIS bit in register

UI_CTRL2_OIS (71h) / SPI2_CTRL2_OIS (71h); for more details about the filter

characteristics see Table 171: Gyroscope OIS chain digital LPF1 filter bandwidth

selection. Gyroscope output values are in registers 22h to 27h if read from the

Auxi_SPI or in registers 4Ah to 4Fh if read from the primary interface with the selected

full scale (FS[1:0]_G_OIS bit in UI_CTRL1_OIS (70h) / SPI2_CTRL1_OIS (70h)).

LSM6DST 数据表(PDF) 52 Page - STMicroelectronics