MCP23017 16-bit I/O Expansion Modules - I2C interface

No matter how many ports an Arduino board has, they never seem to be enough for the cool new project you have in mind. Luckily there is a solution. The Arduino has both I2C and SPI pins, and there are a number of I2C and SPI GPIO chips, and modules built with those chips.

By using this you can connect multiple such modules on the same I2C channel.

Specifications

• Operating voltage：3.0V-5.5V
• Drive chip：MCP23017
• Number of IO: 16 (input, output, interruption)
• Drive power supply: 25mA1
• 12C frequency: 100KHz, 400KHz, 1..7MHz
• working temperature: -40 Celsius -125 Celsius
• Parallel multiple: Up to 8
• Driver: 51 and Arduino
• Module size: 65mm*19mm

Pin descriptions

• VCC: Power source input (3.0V-5.5V)
• GND: Power negative electrode (0V)
• SCL: 12C clock line (SCL connecting single chip IO pin or MCU 12C interface)
• SDA: 12C data line (SDA connecting single chip IO pin or MCU 12C interface)
• RST: Chip reduction (Low level effective, connecting MCU IO pin or unconnected)
• ITA: GPIOA port interrupt output (Connect MCU IO pin, without connection when interruption)
• ITB: GPIOB port interrupt output (Connect MCU IO pin, without connection when interruption)

Package list

• 1 x STC15W408AS MSP
• Double row straight pin 2*7
• Double row Bending pin 2*7
• Single row straight pin 1*20
• Single row Bending pin 1*20