STMPE811_08 Datasheet, PDF (1/54 Pages) STMicroelectronics – 8-bit port expander with advanced touchscreen controller

STMPE811
8-bit port expander with advanced touchscreen controller
Preliminary Data
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
QFN16
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.
Table 1. Device summary
Order code
STMPE811QTR
Package
QFN16
Packaging
Tape and reel
June 2008
Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
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