LSM6DST datasheet(56/180 Pages) STMICROELECTRONICS

56 / 180 page

Functionality

LSM6DST

56/180

DocID033525 Rev 2

Primary interface full control

This option allows the application processor to configure all OIS functionalities from the

primary interface. This option allows using embedded OIS data for both the main and front

camera, connecting them to the application processor (eventually adding a context hub) as

shown in Figure 22: the AP can also do some processing on the data before sending them

to the cameras.

In order to place the device in this mode, the OIS_CTRL_FROM_UI bit in the

FUNC_CFG_ACCESS (01h) register must be set to ‘1’ from the primary interface.

Figure 22. OIS Primary interface full control

Then, the AP can configure OIS functionalities through UI_INT_OIS (6Fh), UI_CTRL1_OIS

(70h), UI_CTRL2_OIS (71h), UI_CTRL3_OIS (72h).

The OIS_EN_SPI2 bit in the UI_CTRL1_OIS (70h) register enables the gyroscope OIS

chain.

Reading from the Auxiliary SPI can be enabled by setting the SPI2_ READ_EN bit in the

UI_INT_OIS (6Fh) register to ‘1’ in order to directly read OIS data (as shown in Figure 22

(b)). The Auxiliary SPI can access the SPI2_INT_OIS (6Fh), SPI2_CTRL1_OIS (70h),

SPI2_CTRL2_OIS (71h), and SPI2_CTRL3_OIS (72h) registers in read-only mode.

Note:

If the accelerometer Ultra-Low-Power Mode is active when activation of the OIS is required,

the device must be set in Power-Down mode before enabling the OIS chain.

Note:

The OIS_CTRL_FROM_UI bit is reset from the SW RESET procedure.

LSM6DST 数据表(PDF) 56 Page - STMicroelectronics