关键词: I2C总线, 两级桥接电路, IP复用, 多功能芯片设计

Abstract: For its simple interface and integral protocol, I2C has become an international standard, which is widely used in consumer electronics, communication products and industrial products. This paper proposed a new structure of Slave device for I2C interface which is based on a two level bridge circuit. First,the structure has a flexibility to add or reduce IP core for different functions. So it can be widely used in the design of multi-function slave device for I2C interface.Second,the structure features that each IP core within the structure can work at its own clock frequency,and this is convenient to design of multi-clock domain system. The proposed structure has been demonstrated in a cipher IC, which is based on HHNEC 0.35µｍ CMOS technology.

Key words: I2C Bus, Two level Bridge Circuit, IP Reuse, Multi-functional Chip Design