STMPE811 Datasheet, PDF (1/3 Pages) STMicroelectronics – 8-bit port expander with advanced touch screen controller

STMPE811
8-bit port expander with advanced touch screen controller
Data Brief
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 I²C interface
■ Up to 2 devices sharing the same bus in I²C
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
QFN16
TSSOP16
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 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.
Table 1. Device summary
Order code
STMPE811QTR
STMPE811TTR
Package
QFN16
TSSOP16
July 2007
Rev 1
For further information contact your local STMicroelectronics sales office.
Packaging
Tape and reel
Tape and reel
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