LSM6DSTX datasheet(33/175 Pages) STMICROELECTRONICS

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

Figure 21. Gyroscope digital chain - mode 3 / mode 4 (OIS/EIS)

ADC

Digital

HP filter

HP_EN_G

HP_EN_OIS

Digital

LP filter

FTYPE[1:0]_OIS

LPF1

SPI /

I2C /

MIPI I3CSM

FIFO

Digital

ODR_G[3:0]

LPF2

SPI_Aux

ODR gyro

@6.6 kHz

(1) (2)

(3)

FSM / MLC

filter

When mode3/4 is enabled, the LPF1 filter is not available in the gyroscope UI chain.

It is recommended to avoid using the LPF1 filter in mode1/2 when mode3/4 is intended to be used.

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 170. Gyroscope OIS chain digital LPF1 filter

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

SPI2_CTRL1_OIS (70h)).

LSM6DSTX

Block diagram of filters

DS14039 - Rev 1

page 33/175

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