AN3299 Datasheet, PDF (1/13 Pages) STMicroelectronics – A hardware and software guide for the STMPE801

AN3299
Application note
A hardware and software guide for the STMPE801
8-bit port expander Xpander Logic™
Introduction
The STMPE801 is a GPIO (general purpose input/output) port expander able to interface a
main digital ASIC via the two-line bidirectional bus (I²C). It offers flexibility as each I/O is
configurable as input, output. This 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.
This document highlights the guidelines and information complementary to the STMPE801;
8-bit port expander Xpander Logic^TM, datasheet that is necessary for the successful design
of STMPE801 in applications. Please also refer to the AN2421; Using STMPE801 as
keypad controller, application note for implementation of a matrix keypad controller with the
STMPE801.
The first part of the document highlights information on the hardware including external
components/connectivity, power, etc.
The second part of the document focuses on information regarding the software, in which
programming sample codes are shown.
November 2010
Doc ID 18113 Rev 1
1/13
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