ماژول رابط I2C با تراشه PCF8574

Function introduction
I / O expansion module based on I2C interface, can expand 8 I / O with 2 I / O (more than 8 PCF8574 can be used simultaneously, expand up to 64 I / O)
Features
Support two types of interface to access the target board: pin header or row seat
Support cascading I2C bus (through the connection method of pin headers and row connectors, multiple I2C modules can be used simultaneously)
Typical applications: I / O expansion for MCUs with a shortage of I / O resources
Main resources: PCF8574, I2C interface, 8-bit parallel port