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.
|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|
|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|
|2||Double row straight pin||2*7||Pin|
|3||Double row Bending pin||2*7||Pin|
|4||Single row straight pin||1*20||Pin|
|5||Single row Bending pin||1*20||Pin|
Tested by ICStation's Outstanding Partner arduinoLab:
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