异构多核系统中跨时钟域的解决方法

随着集成电路的集成度与性能的不断发展，芯片的功耗问题已经变的十分严重，功耗带来的挑战日益突出。异构多核动态调频架构是目前研究低功耗的主流方向。SOC系统当中同一时刻只有一个处理器能够控制总线，其它处理器则处理等待状态，异构多核动态调频架构能够通过降低不控制总线的处理器频率来达到降低功耗的目的。异构多核领域的处理器和总线跨时钟域解决方案，此方案在国内属于首次提出，可以运用在异构多核动态调频(DFS)架构当中。目前手持终端设备越来越强调功耗的重要性，因此异构多核领域的处理器和总线跨时钟域解决方案将有非常好的应用前景。该方案通过在处理器和AMBA总线之间添加FIFO以及一些复杂的算法，达到消除亚稳态和正常通信的目的。最终，通过仿真发现任意调节处理器的工作频率都能满足传输协议。证明该方案能在异构多核动态调频架构中运用。

A method to solve the frequency inconsistent between heterogeneous multi core processor and system bus

With the development of integration and performance of SOC, SOC has reached a hundred watt power consumption. Power consumption challenges increasingly prominent. The microelectronics technology has entered the times of limited power. Power consumption has become the bottleneck for the development of integrated circuit. High power will make the life and performance of products reduce. So the design of low power consumption is the main trend of the future. In the low power design, dynamic frequency scaling always is the focus of research. When the processor operating frequency and bus missing match, that will produce a communication error. In this paper, through the research of MV14 experiment platform, author introduce a solutions which can eliminate the metastable state and get the normal communication purpose by adding FIFO and some combinational logic between MV11 processor and AMBA bus. Finally through the simulation found that any adjust the work frequency of MV11 processor ,it also can meet the transmission protocol.