5

Digital interfaces

5.1

IC serial interface

The registers embedded in the LPS33K may be accessed through the I²C interface.

Pin name

Pin description

SCL

I²C serial clock (SCL)

SDA

I²C serial data (SDA)

5.2

I²C serial interface

The LPS33K I²C is a bus slave. The I²C is employed to write data into registers whose content can also be read

back.

The relevant I²C terminology is given in the following table.

Term

Description

Transmitter

The device which sends data to the bus

Receiver

The device which receives data from the bus

Master

The device which initiates a transfer, generates clock signals and terminates a transfer

Slave

The device addressed by the master

There are two signals associated with the I²C bus: the serial clock line (SCL) and the serial data line (SDA). The

latter is a bidirectional line used for sending and receiving the data to/from the interface. Both lines have to be

connected to VDD through pull-up resistors.

The I²C interface is compliant with fast mode (400 kHz) I²C standards as well as with the normal mode.

LPS33K

Digital interfaces

DS12817 - Rev 3

page 12/31