Log in to myMicrochip to access tools and benefits. Sign up in just one minute.
Maximize Your Experience: Reap the Personalized Advantages by Completing Your Profile to Its Fullest. Update Here
Stay in the loop with the latest from Microchip. Update your profile while you are at it. Update Here
Complete your profile to access more resources. Update Here
Overview
The GPIO Expander Keypad and LCD Demo Board is designed to demonstrate the use of the MCP23S08/17 (SPI interface) and the MCP23008/17 (I2C interface) devices in a keypad and LCD example. The MCP23X17 (16-bit) devices interface to a 2x16 LCD module and the MCP23X08 (8-bit) devices interface to a 4x4 keyed matrix.
- Demonstrates the use of MCP23X08 and MCP23X17 devices for LCD and keypad applications
- Test points allow for easy monitoring of SPI and I2C buses, as well as the keypad and LCD interface to PIC
- ICSP header for the PIC® microcontroller allows users to customize firmware to further evaluate the MCP23X08/17 devices.
- Can be powered from a 3.0V to 5V DC power source (connected to the +5V and GND test points)
N/A
Cannot load image!
Documentation
Filter by Document Type
Search Documentation
|
Title
|
Document Category
|
|||
|---|---|---|---|---|
| MCP23008/MCP23S08 Data Sheet | Data Sheets | Download | ||
| MCP23017/MCP23S17 Data Sheet | Data Sheets | Download | ||
| PIC18F2455/2550/4455/4550 Data Sheet | Data Sheets | Download | ||
| GPIO Expander Keypad and LCD Demo Board User's Guide | User Guide | Download | ||
| GPIO Expander Keypad and LCD Demo Board Firmware | Software Libraries and Firmware | Download | ||
| Unique Features of the MCP23X08/17 GPIO Expanders | Application Notes | Link | Download | |
| I/O Expansion Using the MCP23X08 and PIC10F202 | Application Notes | Link | Download |