STMPE811_08 datasheet(7/54 Pages) STMICROELECTRONICS

Part #	STMPE811

Description	8-bit port expander with advanced touchscreen controller

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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STMPE811

I2C and SPI interface

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3

I2C and SPI interface

3.1

Interface selection

The STMPE811 interfaces with the host CPU via a I2C or SPI interface. The pin IN_1 allows

the selection of interface protocol at reset state.

Figure 3.

STMPE811 interface

Table 4.

Interface selection pins

I2C function

SPI function

Reset state

3

Address 0

Data out

CPHA for SPI

4CLOCK

CLOCK

5

SDATA

CS

CPOL_N for SPI

7

−

Data in

9MODE

I2C set to ‘0’

Set to ‘1’ for SPI

SPI I/F

module

I C I/F

module

DIN

DOUT

CLK

CS

SDAT

SCLK

A0

MUX

unit

2

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STMPE811 Datasheet(PDF) 7 Page - STMicroelectronics

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