User manual

GPIO EXPANDER KEYPAD

AND LCD DEMO BOARD

USER’S GUIDE

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

GPIO Expander Keypad and LCD Demo Board. Items discussed in this chapter

include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the GPIO Expander Keypad and LCD Demo

Board as a development tool. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the GPIO

Expander Keypad and LCD Demo Board.

• Chapter 2. “Installation and Operation” – Includes instructions on how to get

started with this evaluation board.

• Appendix A. “Schematics and Board Layouts” – Shows the schematic and

layout diagrams for the GPIO Expander Keypad and LCD Demo Board.

• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the GPIO

Expander Keypad and LCD Demo Board.

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and

documentation are constantly evolving to meet customer needs, so some actual dialogs

and/or tool descriptions may differ from those in this document. Please refer to our web site

(www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each

page, in front of the page number. The numbering convention for the DS number is

“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the

document.