IIS2DULPX datasheet(28/106 Pages) STMICROELECTRONICS

28 / 106 page

Digital interfaces

The registers embedded inside the IIS2DULPX may be accessed through both the I²C, MIPI I3C®, and SPI serial

interfaces. The latter may be software configured to operate either in 3-wire or 4-wire interface mode.

The serial interfaces are mapped to the same pins. To select/exploit the I²C/MIPI I3C® interface, the CS line must

be tied high (that is, connected to VDDIO).

Table 11. Serial interface pin description

Pin name

Pin description

SPI/I²C/MIPI I3C® mode selection

1: SPI idle mode / I²C/MIPI I3C® enabled

0: SPI enabled / I²C/MIPI I3C® disabled

SCL

SPC

I²C/MIPI I3C® serial clock (SCL)

SPI serial port clock (SPC)

SDA

SDI

SDO

I²C/MIPI I3C® serial data (SDA)

SPI serial data input (SDI)

3-wire interface serial data output (SDO)

TA0

SDO

I²C address selection (TA0)

SPI serial data output (SDO)

6.1

I²C serial interface

The IIS2DULPX I²C is a bus target. The I²C is employed to write data into registers whose content can also be

read back.

The relevant I²C terminology is given in the table below.

Table 12. I²C terminology

Term

Description

Transmitter

The device that sends data to the bus

Receiver

The device that receives data from the bus

Controller

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

Target

The device addressed by the controller

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 must be

connected to VDDIO through an external pull-up resistor. When the bus is free, both the lines are high.

The I²C interface supports fast mode (400 kHz) and fast mode plus (1000 kHz) I²C standards as well as normal

mode.

IIS2DULPX

Digital interfaces

DS14580 - Rev 1

page 28/106

IIS2DULPX Arkusz danych(PDF) 28 Page - STMicroelectronics

IIS2DULPX Arkusz danych(HTML) 28 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Arkusz danych Pobierz

Link URL