Gravity MCP23017 I2C 16 Digital IO Expansion Module

This is an IO expansion module based on the MCP23017 chip. The module can expand up to 16 IOs. It can set 8 different I2C addresses. This means that you can connect up to 8 of these modules to the microcontroller and thus expand to a maximum of 128 IOs. The module has 2 groups of IO pins, GPIOA and GPIOB. Each group has 8 independent IO interfaces, and each IO interface can be set as an input, output, pull-up input (100KΩ pull-up resistor), interrupt, etc. In addition, the module has 2 interrupt pins, IA and IB. IA is used to detect the interruption of the IO interfaces from GPIOA, and IB is used to detect the interruption of the IO interfaces from GPIOB. When a pin from GPIOA or GPIOB changes state, the corresponding IA or IB will produce a high-level signal.

Features:

• Up to 128 I/O expandable
  
• Compatible with both 3.3V and 5V
  
• Switchable I2C address through a selector
  
• Multiple VCC and GND pins

Documentation:

• DFRobot Wiki

Technical Details:

• Manufacturer: DFRobot
  
• Manufacturer SKU: DFR0626
  
• Operating Voltage: 3.3-5.5V
  
• I2C Address : 0x20-0x27
  
• Digital Input/Output : 20mA
  
• Interrupt Pin: IA, IB
  
• Dimensions: 44 x 32 x 11mm
  
• Weight: 18g

Scope of Delivery:

• 1x Gravity MCP23017 I2C 16 Digital IO Expansion Module
  
• 1x Gravity-4p I2C/UART Cable