I/O (Input/Output) communication interface module

The utility model relates to an I/O (Input/Output) communication interface module which comprises an MCU (Microprogrammed Control Unit) chip, four data input circuits, a data output circuit and a time sequence control circuit, wherein communication data is input to the MCU chip through the four data input circuits, the time sequence control circuit is connected with the MCU chip, the MCU chip outputs the processed communication data through the data output circuit, and the data input circuits, the data output circuit and the time sequence control circuit are all photoelectrical coupling circuits. The I/O communication interface module can perform efficient and fast data transmission and communication by virtue of a limited number of I/O interfaces.