I^2C SIave器件内部结构设计及VLSI实现

I^2C总线由于接口简单、协议完善，已经被广泛地应用在消费类电子产品、通信产品和工业电子产品中。成为国际标准。论文提出一种基于两级桥接口的I^2C SLAVE器件的内部结构。该结构一方面能够根据系统的需求灵活地集成和裁减各种功能的IP核模块，对于多功能的I^2CSLAVE器件的设计有一定的通用性；另一方面它支持各IP核模块工作于自己独立的时钟域，给多时钟域系统设计带来便利。以一款密码芯片为实例，对该结构进行了验证和实现，该芯片采用了华虹NEC0．35μm CMOS工艺。

Design of I^2C slave device structure and Its VLSI implementation.

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 proposes 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 0.35um CMOS technology.