LSM6DSO datasheet(26/172 Pages) STMICROELECTRONICS

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5.4

Master I²C interface

If the LSM6DSO is configured in Mode 2, a master I²C line is available. The master serial interface is mapped in

the following dedicated pins.

Table 16. Master I²C pin details

Pin name

Pin description

MSCL

I²C serial clock master

MSDA

I²C serial data master

MDRDY

I²C master external synchronization signal

5.5

Auxiliary SPI interface

If the LSM6DSO is configured in Mode 3 or Mode 4, the auxiliary SPI is available. The auxiliary SPI interface is

mapped to the following dedicated pins.

Table 17. Auxiliary SPI pin details

Pin name

Pin description

OCS_Aux

Auxiliary SPI 3/4-wire enable

SDx

Auxiliary SPI 3/4-wire data input (SDI_Aux) and SPI 3-wire data output (SDO_Aux)

SCx

Auxiliary SPI 3/4-wire interface serial port clock

SDO_Aux

Auxiliary SPI 4-wire data output (SDO_Aux)

When the LSM6DSO is configured in Mode 3 or Mode 4, the auxiliary SPI can be connected to a camera module

for OIS/EIS support. In this configuration, the auxiliary SPI can write only to the dedicated registers INT_OIS

(6Fh), CTRL1_OIS (70h), CTRL2_OIS (71h), CTRL3_OIS (72h). All the registers are accessible in Read mode

from both the primary interface and auxiliary SPI.

Mode 3 is enabled when the OIS_EN_SPI2 bit in CTRL1_OIS (70h) register is set to 1.

Mode 4 is enabled when both the OIS_EN_SPI2 bit and the Mode4_EN bit in CTRL1_OIS (70h) register are set

to 1.

LSM6DSO

Master I²C interface

DS12140 - Rev 2

page 26/172

LSM6DSO Datasheet(PDF) 26 Page - STMicroelectronics