嵌入式系统对处理器功耗开销有严格的限制,异步电路技术可以作为设计低功耗处理器的有效方法之一.针对嵌入式多媒体应用,本文设计实现了一款低功耗异步微处理器——腾越-Ⅱ.处理器中包含一个异步TTA微处理器内核、一个同步TTA微处理器内核、两个存储控制器和多个外部通信接口.异步内核通过基于宏单元的异步电路设计方法实现,其它部分通过基于标准单元的半定制设计流程实现.处理器芯片采用UMC 0.18μm CMOS工艺实现,基片面积为4.89×4.89mm2,工作电压为1.8V.经测试,处理器工作主频达到200MHz,且异步内核的功耗开销低于同步内核的50％.%In embedded systems, the power consumption of processors is restricted to a low limit. A-synchronous circuit techniques can be effective methods to design low power processors. In order to meet the performance and power requirements of the multimedia applications in embedded systems, a low power asynchronous microprocessor named "TengYue-II " is designed and implemented. A 32-bit on-chip bus, two transport triggered architecture cores, two memory controllers and several communication interfaces form the processor. One processor core is based on asynchronous circuits and the other one is its synchronous counterpart. TengYue- II processor is implemented in the UMC 0. 18jam CMOS technology and the supply voltage is 1. 8V. The area of the chip is 4. 89mm X 4. 89mm. The experimental results show that both cores can run correctly at the frequency of 200MHz and the asynchronous core's power consumption is lower than 50% of the synchronous core.
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