DigIO16-I2C

Features

• 16 bit GPIO
• MCP23017 I2C Parallel I/O
  • I2C host interface
  • 100/400 KHZ operation
  • 25mA sink/source capability per I/O
• Jumper selectable 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 Personality EEPROM
• 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-25 I/O connector

Schematic

• Schematic

Driver

• Driver code
• Example code