STMPE811中文资料

Data Brief

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July 2007

Rev 1

1/3

STMPE811

8-bit port expander with advanced touch screen controller

Features

■8 GPIOs

■ 1.8-3.3V operating voltage

■Integrated 4-wire touch screen controller ■Interrupt output pin

■Wake-up feature on each I/O ■SPI and I 2

C interface

■Up to 2 devices sharing the same bus in I 2C mode (1 address line)■8-input 12-bit ADC

■Touch screen controller buffer depth of 128■Touch screen movement detection algorithm to avoid excessive data ■

8kV HBM ESD protection

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 (I 2C). A separate GPIO expander IC is often used in mobile-multimedia platforms to solve the

problems of the limited amounts of GPIOs usually available on the digital engine.

The STMPE811 offers great flexibility as each I/Os can be configured as input, output or specific functions. The device has been designed with very low quiescent current and includes a wake-up feature for each I/O, to optimize the power consumption of the IC.

A 4-wire touch screen controller is built into the STMPE811. The touch screen controller is

enhanced with movement tracking algorithm, 128- depth buffer and a programmable active window feature.

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Table 1. Device summary

Order code Package Packaging STMPE811QTR QFN16T ape and reel STMPE811TTR

TSSOP16T ape and reel

Revision history STMPE811

2/3

1 Revision history

Table 1. Revision history

Date Revision

Changes

24-Jul-2007

1

Initial release

STMPE811

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