AIS2IH datasheet(19/63 Pages) STMICROELECTRONICS

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Table 11. Internal pin status

Pin #

Name

Function

Pin status

SCL

SPC

I²C serial clock (SCL)

SPI serial port clock (SPC)

Default: input without internal pull-up

SPI enable

I²C/SPI mode selection

1: SPI idle mode / I²C communication enabled

0: SPI communication mode / I²C disabled

Default: input with internal pull-up(1)

SDO

SA0

Serial data output (SDO)

I²C less significant bit of the device address (SA0)

Default: input with internal pull-up(2)

SDA

SDI

SDO

I²C serial data (SDA)

SPI serial data input (SDI)

3-wire interface serial data output (SDO)

Default: (SDA) input without internal pull-up

Internally not connected. Can be tied to VDD, Vdd_IO, or GND.

GND

0 V supply

RES

Connect to GND

GND

0 V supply

VDD

Power supply

Vdd_IO Power supply for I/O pins

INT2

Interrupt pin 2. Clock input when selected in single data conversion on demand. Default: push-pull output forced to Gnd

INT1

Interrupt pin 1

Default: push-pull output forced to Gnd

1. In order to disable the internal pull-up on the CS pin, write '1' to the CS_PU_DISC bit in CTRL2 (21h).

2. Internal pull-up on SDO/SA0 pin cannot be disabled: do not connect this pin to GND in low-power

applications.

AIS2IH

Application hints

DS12421 - Rev 4

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