AN3245 datasheet(1/19 Pages) STMICROELECTRONICS

Part #	AN3245

Description	A hardware and software guide for the STMPE1801 Xpander

PDF	19 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 19 page

November 2010

Doc ID 17747 Rev 1

1/19

AN3245

Application note

A hardware and software guide for the STMPE1801 Xpander

Logic™ 18-bit enhanced port expander with keypad controller

Introduction

The STMPE1801 is a GPIO (general purpose input/output) port expander able to interface a

main digital ASIC via a two-line bidirectional bus (I2C). It offers the flexibility to be configured

into a 10x8 matrix keypad controller for QWERTY keyboards and general purpose

inputs/outputs.

This document highlights the guidelines and information complementary to the

STMPE1801; Xpander LogicTM 18-bit enhanced port expander with keypad controller,

datasheet, which is necessary for the successful design of STMPE1801 in applications.

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.

www.st.com

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