LSM6DSOP datasheet(42/107 Pages) STMICROELECTRONICS

42 / 107 page

The procedure to correctly initialize the device is as follows:

INT: Leave unconnected or connect with external pull-down during power-on. Pull-up must be avoided on this pin.

Properly configure the device:

SPI case: I2C_disable = 1 in CTRL4_C (13h) and DEVICE_CONF = 1 in CTRL9_XL (18h).

I²C case: I2C_disable = 0 (default) in CTRL4_C (13h) and DEVICE_CONF = 1 in CTRL9_XL (18h).

Table 17. Internal pin status

pin#

Name

Pin function

Pin status

SDO

SPI 4-wire interface serial data output (SDO)

Default: input without pull-up.

Pull-up is enabled if bit SDO_PU_EN = 1 in reg 02h.

SA0

I²C least significant bit of the device address (SA0)

RES

Connect to VDDIO or GND

Default: input without pull-up.

Pull-up is enabled if bit PU_EN = 1 in reg 14h in pull-up configuration

registers (see Note to enable pull-up).

RES

Connect to VDDIO or GND

Default: input without pull-up.

Pull-up is enabled if bit PU_EN = 1 in reg 14h in pull-up configuration

registers (see Note to enable pull-up).

INT

Programmable interrupt

Default: input with pull-down(1)

1. INT must be set to '0' or left unconnected during power-on.

VDDIO

Power supply for I/O pins

GND

0 V supply

GND

0 V supply

VDD

Power supply

Leave unconnected

Default: output forced to ground

Leave unconnected

Default: input with pull-up

Leave unconnected

Default: input with pull-up

I²C/SPI mode selection

(1:SPI idle mode / I²C communication enabled;

0: SPI communication mode / I²C disabled)

Default: input with pull-up.

Pull-up is disabled if bit I2C_disable = 1 in reg 13h and

DEVICE_CONF = 1 in reg 18h.

SCL

I²C / SPI serial port clock (SPC)

Default: input without pull-up

SDA

I²C (SDA) / SPI serial data input (SDI) /

3-wire interface serial data output (SDO)

Default: input without pull-up

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