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Manufacturer Part #


GPIO Expander Keypad and LCD Demo Board

Mfr. Name: Microchip
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Technical Attributes
Attributes Table
Application Type: Interfacing Solutions
Core Supported: MCP23008
Features & Applications

Microchip Technology Inc. is a leading provider of microcontroller and analog semiconductors, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide.  Microchip’s product line is the solution for your embedded design needs. From cost-competitive Analog and Memory devices to performance PIC® Microcontrollers (MCUs) and dsPIC® Digital Signal Controllers (DSCs), their devices provide a custom fit in your cost sensitive design.

Summary Description:

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)

The GPIODM-KPLCD is a MCP23S08/17 and MCP23008/17 Evaluation Board

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