MCP23017 IO Expansion Board

From CQRobot-Wiki
Revision as of 06:44, 30 July 2020 by Chenqi (talk | contribs) (Connection Diagram)
Jump to: navigation, search

Introduction

The MCP23017 IO Expansion Board expands 2 signal pins as 16 I/O pins based on the I2C bus, up to 8 MCP23017 IO Expansion Board can be used at the same time, providing up to 128 I/O pins, it is compatible with both 3.3V and 5V levels.


Features

  • I2C controlled, expands 2 signal pins as 16 I/O pins
  • I2C address configurable by shorting the A0/A1/A2 jumpers
  • Up to 8 MCP23017 IO Expansion Board can be used at the same time, providing up to 128 I/O pins.
  • Onboard voltage translator, compatible with 3.3V/5V level
  • Comes with development resources and manual (examples for Raspberry Pi / micro:bit / Arduino / STM32)

Product Size

MCP23017 IO Expansion Board-72.jpg
MCP23017 IO Expansion Board-73.jpg

Pin Description

MCP23017 IO Expansion Board-71.jpg

Connection Diagram

Connect to Arduino:

  • Note: Do not connect the DuPont female single-head wire directly to the UNO R3 control board. You need to stack the sensor expansion board on the UNO R3 control board or connect the male-to-male Dupont wire on the Dupont female single-head wiring(bread wire).
  • We connected the 4Pin interface of the sensor to the UNO R3 control board in the experiment.
MCP23017 IO Expansion Board-74.jpg

Connect to Raspberry Pi:

  • We connected the 4pin interface of the sensor to the Raspberry Pi 4B control board in the experiment.
MCP23017 IO Expansion Board-75.jpg

Specifications

Sensor Specifications

  • Operating Voltage: 5V/3.3V
  • Interface: I2C (JST PA SMT 6-Pin interface to 2.54mm pitch pin header interface)
  • Interrupt Pins: INTA, INTB
  • Expansion I/Os: 16
  • Dimension: 45.24mm * 31.79mm
  • Mounting Hole Size: 3.0mm

Ocean Wire Specifications

  • Cable specifications: 22AWG
  • Material: Silicone
  • Withstand Voltage: Less Than 50V
  • Withstand Current: Less Than 1000MA
  • Length: 21cm
  • Line Sequence: Black-negative power supply, Red-positive power supply, Green-SDA, Blue-SDA, Yellow-INTA, Orange-INTB.