DigIO16-I2C

Features

• 16 bit GPIO
  • MCP23017 Datasheet - Rev D
  • MCP23017... LOST TWO INPUTS
    • MCP23017 now a 14/16-bit expander, with two of the pins (GPA7 and GPB7) losing their input capabilities
    • The chips look the same, are called the same, and act mostly the same — if you don’t download the latest version of the datasheet (Revision D), you’d never know that there’s been a change
  • I2C host interface
  • 100/400 KHZ operation
  • 25mA sink/source capability per I/O
• Jumper selectable I2C terminators
• 3-bit address (Jumper selectable) - Up to 8 boards
• I2C Connector
  • Daisy-chained 4-pin host interface connector (Ground, Power, Clock, Data)
• Power Connector
• DB-25 Connector for GPIO lines
• 24LC024 ODAS Personality EEPROM
  • pid = 1
• 3.3V or 5V operation
• Compatible with Arduino, Raspberry Pi, BeagleBone Black
• 95x95mm form factor
• (4) 6-32 mounting holes - one on each corner

Connectors

J1 - Power Connector (Optional)

J2, J3 - Daisy-chained I2C Connectors

J4 - Address Base Jumpers

• Install for address bit = 0

J5 - Interrupt/Card Present

J6 - I2C Terminators

J7 - Write Enable Jumper

• Install to enable writes

J8 - DB-25F I/O connector

Schematic

• Schematic

Drivers

Arduino

• LandBoards_MCP23017 Driver code
• LandBoards_MCP23017 Example code

Raspberry Pi

• Example code

Raspberry Pi Pico

MMBASIC

• SWLEDX8-01.bas - Read 8x switches, write 8x LEDs
• MMBASIC Example Code - Bounce a bit across the 16-bits (not for use with SWLEDX8 card)