LSM6DST datasheet(50/180 Pages) STMICROELECTRONICS

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Functionality

LSM6DST

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DocID033525 Rev 2

The accelerometer filtering chain when Mode 4 is enabled is illustrated in the following

figure.

Figure 18. Accelerometer chain with Mode 4 enabled

Note:

Mode 4 is enabled when Mode4_EN = 1 and OIS_EN_SPI2 = 1 in UI_CTRL1_OIS (70h) /

SPI2_CTRL1_OIS (70h).

The configuration of the accelerometer UI chain is not affected by enabling Mode 4.

Accelerometer output values are available in the following registers with ODR at 6.66 kHz:



UI_OUTX_L_A_OIS (50h) and UI_OUTX_H_A_OIS (51h) through

UI_OUTZ_L_A_OIS (54h) and UI_OUTZ_H_A_OIS (55h)



SPI2_OUTX_L_A_OIS (28h) and SPI2_OUTX_H_A_OIS (29h) through

SPI2_OUTZ_L_A_OIS (2Ch) and SPI2_OUTZ_H_A_OIS (2Dh)

Accelerometer full-scale management between the UI chain and OIS chain depends on the

setting of the XL_FS_MODE bit in register CTRL8_XL (17h).

6.4.2

Block diagrams of the gyroscope filters

In the LSM6DST, the gyroscope filtering chain depends on the mode configuration:

Mode 1 (for User Interface (UI) and Electronic Image Stabilization (EIS) functionality

through primary interface) and Mode 2

Figure 19. Gyroscope digital chain - Mode 1 (UI/EIS) and Mode 2

In this configuration, the gyroscope ODR is selectable from 12.5 Hz up to 6.66 kHz. A low-

pass filter (LPF1) is available if the auxiliary SPI is disabled, for more details about the filter

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