What is it?

• 16-bit Digital I/O card
• MCP23017 16-bit I2C I/O Expander
• Strong library support for all major microprocessors for MCP23017
• I2C Interface - Two Wire Interface
• Can run at 400 KHz (3.3V) or faster (5V)
• I/O Connector is inexpensive/standard DB-25
• Fuse protected power output on DB-25 with jumper bypass
• Large prototyping area
• Connections at edges to DB-25 and GPIO lines
• EEPROM for board ID and application specific information
• Write Enable jumper protects against accidental writes
• Open Data Acquisition System (ODAS) form factor (width is 95 mm)
• Host connectors
• Daisy-chain I2C connector
• Address select jumper
• Expandable I2C via I2C-RPT - I2C Repeater
• Interrupt out/Card Present
• Power connector (not required for minimal loads)
• Reversible pinout for safety
• I2C Termination jumpers for end of I2C chain
• Power can be 3.3V or 5V
• 95mm wide Open Data Acquisition System format
• 6-32 Mounting holes