Microchip Technology GPIODM-KPLCD User guide

GPIO Expander Keypad and LCD

Demo Board

User’s Guide

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• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

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code hopping devices, Serial EEPROMs,

GPIO EXPANDER KEYPAD

AND LCD DEMO BOARD

USER’S GUIDE

Table of Contents

Preface ........................................................................................................................... 1

Introduction............................................................................................................ 1

Document Layout .................................................................................................. 1

Conventions Used in this Guide ............................................................................ 2

Recommended Reading........................................................................................ 2

The Microchip Web Site ........................................................................................ 3

Customer Support ................................................................................................. 3

Document Revision History ................................................................................... 3

Chapter 1. Product Overview ....................................................................................... 5

1.1 Introduction ..................................................................................................... 5

1.2 What is the GPIO Expander Keypad and LCD Demo Board? ....................... 5

1.3 What The GPIO Expander Keypad and LCD Demo Board Kit Includes ........ 5

Chapter 2. Installation and Operation ......................................................................... 7

2.1 Introduction ..................................................................................................... 7

2.2 Features ......................................................................................................... 7

2.3 Getting Started ............................................................................................... 8

2.4 GPIO Expander Keypad and LCD Demo Board Description ......................... 9

2.5 Firmware Description ................................................................................... 10

Appendix A. Schematics and Board Layouts ........................................................... 15

A.1 Introduction .................................................................................................. 15

A.2 Board Schematic - Page 1 ......................................................................... 16

A.3 Board Schematic - Page 2 ......................................................................... 17

A.4 Board Schematic - Page 3 ......................................................................... 18

A.5 Board - Top Layer (with Silk screen) .......................................................... 19

A.6 Board - Bottom Layer ................................................................................. 19

Appendix B. Bill Of Materials (BOM) ......................................................................... 21

Worldwide Sales and Service .................................................................................... 24

GPIO Expander Keypad and LCD Demo Board User’s Guide

NOTES:

GPIO EXPANDER KEYPAD

AND LCD DEMO BOARD

USER’S GUIDE

Preface

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.

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.

GPIO Expander Keypad and LCD Demo Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

A menu path File>Save

A tab Click the Power tab

where N is the total number of digits, R is the radix and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

Choice of mutually exclusive arguments; an OR selection

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options] errorlevel {0|1}

IDE User’s Guide

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web site contains the following information:

• Product Support – Data sheets and errata, application notes and sample programs, design resources, user’s guides and hardware support documents, latest software releases and archived software

• General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online discussion groups, Microchip consultant program member listing

• Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

• Development Systems Information Line

Customers should contact their distributor, representative or field application engineer for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.

Technical support is available through the web site at: http://support.microchip.com

Preface

DOCUMENT REVISION HISTORY

Revision A (October 2006)

• Initial Release of this Document.

GPIO Expander Keypad and LCD Demo Board User’s Guide

NOTES:

GPIO EXPANDER KEYPAD

AND LCD DEMO BOARD

USER’S GUIDE

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the GPIO Expander Keypad and LCD Demo Board and covers the following topics:

• What is the GPIO Expander Keypad and LCD Demo Board?

• What the GPIO Expander Keypad and LCD Demo Board Kit includes

1.2 WHAT IS THE GPIO EXPANDER KEYPAD AND LCD DEMO BOARD?

The GPIO Expander Keypad and LCD Demo Board allows the system designer to evaluate the operation of the MCP23X17 and MCP23X08 General Purpose I/O (GPIO) Expanders. The board demonstrates the GPIO Expanders’ performance in a keypad and LCD example.

1.3 WHAT THE GPIO EXPANDER KEYPAD AND LCD DEMO BOARD KIT INCLUDES

This GPIO Expander Keypad and LCD Demo Board Kit includes:

• One GPIO Expander Keypad and LCD Demo Board (102-00116)

- MCP23008 GPIO Expander with I

- MCP23S08 GPIO Expander with SPI interface (installed)

- MCP23017 GPIO Expander with I

- MCP23S17 GPIO Expander with SPI interface (installed)

• Analog and Interface Products Demonstration Boards CD-ROM (DS21912)

- GPIO Expander Keypad and LCD Demo Board User’s Guide (DS51636)

-PIC

-PCB Gerber Files

Microcontroller Firmware

C™ interface (installed)

+ 19 hidden pages

Microchip Technology GPIODM-KPLCD User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

INTRODUCTION

DOCUMENT LAYOUT

CONVENTIONS USED IN THIS GUIDE

RECOMMENDED READING

THE MICROCHIP WEB SITE

CUSTOMER SUPPORT

DOCUMENT REVISION HISTORY

Chapter 1. Product Overview

1.1 INTRODUCTION

1.2 WHAT IS THE GPIO EXPANDER KEYPAD AND LCD DEMO BOARD?

1.3 WHAT THE GPIO EXPANDER KEYPAD AND LCD DEMO BOARD KIT INCLUDES