DFRobot

Gravity: MCP23017 IIC 16 Digital IO Expansion Module

Name: Gravity: MCP23017 IIC 16 Digital IO Expansion Module
Brand: DFRobot
SKU: DF-DFR0626
Price: 9.25 AUD
Availability: InStock

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This is an IO expansion module that based on the chip MCP23017. The module can expand additional 16 IOs. It can set 8 IIC addresses, which means with this mo...

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This is an IO expansion module that based on the chip MCP23017. The module can expand additional 16 IOs. It can set 8 IIC addresses, which means with this module, the microcontroller can connect 8 modules, and expand 128 IOs at most. The module solves insufficient IO ports problem in applications like robots and interactive medias.

This Gravity: MCP23017 IIC IO 16 digital IO expansion module has 2 groups of IO pins, GPIOA and GPIOB. Each group has 8 independent IO interfaces, and each IO interface can be set to input, output, pull-up input (connect to 100KΩ pull-up resistor), interrupt and so on.

Besides, the module has 2 interrupt signal pins: IA and IB. IA is used to detect the interruption in IO interfaces of GPIOA, and IB is used to detect the interruption in IO interfaces of GPIOB. When one pin of GPIOA or GPIOB interrupts, the corresponding IA or IB will produce a high-level signal.

FEATURES

Supporting to expand 128 IOs at most
Multiple IO mode
Changeable IIC address by dial switch
Multiple VCC and GND pins leaded
Compatible with both 3.3V and 5V

Scenarios

Robots
Interactive medias
Light cube

SPECIFICATION

Operating Voltage: 3.3V~5.5V
IIC Address: 0x20~0x27
Digital Input/Output: 20Ma
Signal Interrupt Pin: IA, IB
Dimension: 44x32mm / 1.73x1.26inch

DOCUMENTS

Product wiki

Jargon buster

Plain-language definitions for the technical terms used above.

GND: GND is the ground or reference connection (0 V) for a circuit. When connecting two devices together, their grounds must be joined so both agree on what counts as a low or high signal.
Gravity: Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
microcontroller: A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
VCC: VCC is the positive power-supply connection on a chip or module. Connecting it to the correct supply voltage is needed for the part to power on and helps avoid damaging the electronics.