Black Version 16-Bit Remote Bidirectional I/O Port: - I/O pins default to input High-Speed I2C Interface (MCP23017): - 100kHz - 400kHz - 1.7MHz High-Speed SPI Interface (MCP23S17): - 10 MHz (maximum) Three Hardware Address Pins to Allow Up to Eight Devices On the Bus Configurable Interrupt Output Pins: - Configurable as active-high, active-low or open-drain INTA and INTB Can Be Configured to Operate Independently or Together Configurable Interrupt Source: - Interrupt-on-change from configured register defaults or pin changes Polarity Inversion Register to Configure the Polarity of the Input Port Data External Reset Input Low Standby Current: 1 A (max.) Operating Voltage: - 1.8V to 5.5V @ -40°C to +85°C - 2.7V to 5.5V @ -40°C to +85°C - 4.5V to 5.5V @ -40°C to +125°C Green Version 1. Description: This module is the 16 way IO extension module of the 12C interface, and built in the MCP23017 chip of MicroChip. The function of the chip is complete. Each IO can be arbitrarily configured as input or output, and a pull up resistor can be set, and the interrupt function can be enabled for the IO configured as input. The IO interface has a strong driving capacity, and the current and current can reach 25mA. MCP23017 is a high-speed IIC interface. It supports the IIC frequency of 100KHz, 400KHz and 1.7MHz. The chip has 3 address pins, which can be set up for 8 different addresses. So 8 modules can be connected through two IIC buses to achieve up to 128 IO extensions. This module is flexible in configuration and strong in driving ability. There are many parallel connections. 2. Parameters: No. Parameter Value 1 Operating voltage 3.0V-5.5V 2 Drive chip MCP23017 3 Number of IO 16 (input, output, interruption) 4 Drive power supply 25mA1 5 12C frequency 100KHz, 400KHz, 1..7MHz 6 working temperature -40 Celsius -125 Celsius 7 Chip level Industrial grade 8 Parallel multiple Up to 8 9 Driver 51 and Arduino 10 Module size 65mm*19mm 3. Pin description: No. Pin Function Remark 1 VCC Power source input 3.0V-5.5V 2 GND Power negative electrode 0V 3 SCL 12C clock line SCL connecting single chip IO pin or MCU 12C interface 4 SDA 12C data line SDA connecting single chip IO pin or MCU 12C interface 5 RST Chip reduction Low level effective, connecting MCU IO pin or unconnected 6 ITA GPIOA port interrupt output Connect MCU IO pin, without connection when interruption 7 ITB GPIOB port interrupt output Connect MCU IO pin, without connection when interruption _x000D_