STMPE811_08 datasheet(1/54 Pages) STMICROELECTRONICS

Part #	STMPE811

Description	8-bit port expander with advanced touchscreen controller

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Preliminary Data

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

June 2008

Rev 1

1/54

54

STMPE811

8-bit port expander with advanced touchscreen controller

Features

■ 8 GPIOs

■ 1.8 - 3.3 V operating voltage

■ Integrated 4-wire touchscreen controller

■ Interrupt output pin

■ Wakeup feature on each I/O

■ SPI and I2C interface

■ Up to 2 devices sharing the same bus in I2C

mode (1 address line)

■ 8-input 12-bit ADC

■ 128-depth buffer touchscreen controller

■ Touchscreen movement detection algorithm

■ 25 kV air-gap ESD protection (system level)

■ 4 kV HBM ESD protection (device level)

Applications

■ Portable media players

■ Game consoles

■ Mobile and smart phones

Description

The STMPE811 is a GPIO (general purpose

input/output) port expander able to interface a

main digital ASIC via the two-line bidirectional bus

(I2C). A separate GPIO expander is often used in

mobile multimedia platforms to solve the

problems of the limited amount of GPIOs typically

available on the digital engine.

The STMPE811 offers great flexibility, as each I/O

can be configured as input, output or specific

functions. The device has been designed with

very low quiescent current and includes a wakeup

feature for each I/O, to optimize the power

consumption of the device.

A 4-wire touchscreen controller is built into the

STMPE811. The touchscreen controller is

enhanced with a movement tracking algorithm to

avoid excessive data, 128 x 32 bit buffer and a

programmable active window feature.

QFN16

Table 1.

Device summary

Order code

Package

Packaging

STMPE811QTR

QFN16

Tape and reel

www.st.com

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STMPE811 Datasheet(PDF) 1 Page - STMicroelectronics

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