摘要：【中文】本发明公开了一种基于FPGA的功能模块，包括：顶层模块、DMUX选择模块、MUX32选择模块、从机Slave模块、逻辑模块、TestBench模块、下游从机模块和三态门模块。所有模块都在顶层模块中实现了连接，并且在顶层模块中也运用了很重要的时序逻辑，在I2C协议的实现中，其中的难点在于SCL/SDA数据和时序线上的双向传输，基于设计的时序逻辑使三态门逻辑可以实现数据的双向传输。本发明的优点是：充分利用FPGA的可定制、可重构、并行性，不仅仅用FPGA实现了PCA9547芯片基本功能的替代，同时还拓展了PCA9547的功能，使I2C总线资源被拓展，拓展更多路的通道，却更加节约电路设计的成本，节约电路设计时的面积与复杂度，提供了更加灵活使用I2C资源的方式。 【EN】The invention discloses a function module based on FPGA, comprising: the device comprises a top module, a DMUX selection module, a MUX32 selection module, a Slave module, a logic module, a Testbench module, a downstream Slave module and a tri-state gate module. All modules realize connection in the top module, and important sequential logic is also applied in the top module, in the implementation of the I2C protocol, the difficulty is that the SCL/SDA data and bidirectional transmission on the sequential line are difficult, and the sequential logic based on design enables the tri-state gate logic to realize bidirectional transmission of data. The invention has the advantages that: the customizable, reconfigurable and parallel performance of the FPGA is fully utilized, the FPGA is used for realizing the replacement of the basic functions of the PCA9547 chip, and the functions of the PCA9547 are expanded, so that the I2C bus resources are expanded, more multi-channel channels are expanded, the cost of circuit design is saved, the area and the complexity during circuit design are saved, and a mode of using the I2C resources more flexibly is provided.