Features

This card is a great way to experiment with I2C at a low cost.

• Land Boards Wiki Page for the I2CIO-8 cars
• 8 bits of Digital I/O MCP23008P
• 4 LEDs - outputs
• 4 Jumpers - inputs
• I2C interface
• Base address = 0x20
• Address offset jumpers (0-7)
• Interrupt LED
• 2.7V to 5.5V
• Daisy-chain connector
• 49x49mm form factor
• (4) #4-40 mounting holes
• Extensive Driver Support for Arduino, Raspberry Pi, MicroPython, ESP-32, Blue Pill Board, Cypress PSoC

Connectors

P1/P2 = I2C

Connectors are both wired the same which allows for daisy-chaining I2C devices

• GND
• +V
• SDA
• SCK

H1-H3 - I2C offset address

• In = 0

• Out = 1

• H1 = A0

• H2 = A1
• H3 = A2

H4-H7 Digital inputs

• In = 0
• Out = 1

H8-H9 = I2C Terminators

• Install jumpers for termination

Indicators

D0-D3

• LEDs that can be turned off/on

Programming

• GP0 - LED D0
• GP1 - LED D1
• GP2 - LED D2
• GP3 - LED D3
• GP4 - H4
• GP5 - H5
• GP6 - H6
• GP7 - H7