GPIODM-KPLCD: 8/16-Bit GPIO Exp, 4x4 Keypad, LCD

The GPIO Expander Keypad and LCD Demo Board is designed to demonstrate using GPIO expanders in a keypad and LCD example. The MCP23X17 interfaces to a 2x16 LCD module and the MCP23X08 interfaces to a 4x4 keyed matrix.

Both the I2C and SPI versions are included on the board to demonstrate both serial interfaces.

The GPIO Expander Keypad and LCD Demo Board has the following features:

• Two (2) 8-bit GPIO Expanders

• MCP23008 with I2C interface

• MCP23S08 with SPI interface

• Two (2) 16-bit GPIO Expanders

• MCP23017 with I2C interface

• MCP23S17 with SPI interface

• 4X4 keypad layout (16 momentary buttons)

• Numbers 0 - 9

• Six special function buttons

• A 2X16 LCD module

• Headers for the MCP23X08 and MCP23X17 pins

• Header for programming the PIC18F4550