User manual

GPIO EXPANDER KEYPAD
AND LCD DEMO BOARD
USER’S GUIDE
© 2006 Microchip Technology Inc. DS51636A-page 5
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
2
C™ interface (installed)
- MCP23S08 GPIO Expander with SPI interface (installed)
- MCP23017 GPIO Expander with I
2
C™ interface (installed)
- 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
®
Microcontroller Firmware
-PCB Gerber Files