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I2CIO-8 X2-6000-640px.jpg


  • 8 bits of Digital I/O
  • I2C interface
  • MCP23008 - 8-Bit I/O Expander with I2C Interface
  • Base address = 0x20
  • Address offset jumpers (0-7)
  • Interrupt pin on I2C connectors
  • Interrupt LED
  • I2C Daisy-chain connectors
  • 4 input (or output) jumpers
  • 4 LEDs
  • 2.7V to 5.5V
  • 49x49mm form factor
  • (4) #4-40 mounting holes

Drivers/Example Code[edit]

Extensive Driver Support for Arduino, Raspberry Pi, MicroPython, ESP-32, Blue Pill Board, Cypress PSoC


X - Boards without EEPROMs
  • Select 1
Select the board type
1 - I2CIO8 board
  • Select C for Card Tests
C=Card Tests, D=Direct, E=EEPROM, I=access Internal DIGIO32
  • Menu presents
L/S=Loop/Single, T=Test, B=Bounce LEDs, I=Int'l Tests, X=eXit sub-menu
  • Select B for Bounce LEDs
  • Verify LEDs bounce back and forth cylon warrior style
  • Hit any key to exit bouncing
  • Select T for Test Card
  • Insert jumpers onto H5-H8 and verify on serial terminal

Assembly Sheet[edit]