应用于导航SoC的专用DMA的设计  

Design of dedicated DMA applied to navigation SoC

作　　者：秦爽 李健[1] 杨颖[1] 陈杰[1] Qin Shuang;Li Jian;Yang Ying;Chen Jie(Institute of Microelectronics of the Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院微电子研究所,北京100029 [2]中国科学院大学,北京100049

出　　处：《电子技术应用》2021年第3期27-30,共4页Application of Electronic Technique

基　　金：国家重点研发项目(2019YFB2204200)。

摘　　要：卫星导航技术以及社会的快速发展使得高精度定位的需求越来越大。随着导航系统和频点的增加,导航模块中需要处理的数据量越来越大。通用DMA(Direct Memory Access)控制器无法完成大量通道的传输,采用中央处理器(CPU)传输需要占用CPU大量的时间。应用于导航片上系统(SoC)的专用DMA支持全系统全频点的导航通道的数据搬移,经过测试验证,DMA搬移相同通道数的数据所需要的时钟周期为CPU的三分之一,有效提高了CPU的效率。在设计中采用了低功耗优化技术,优化后DMA模块动态功耗降低至原来的15%。The rapid development of satellite navigation technology and society has made the demand for high-precision positioning increasingly large.With the increase of navigation systems and frequency points,the amount of data that needs to be processed in the navigation module is increasing.The general DMA(Direct Memory Access)controller cannot complete the transmission of a large number of channels,and the transmission using the CPU requires a lot of CPU time.The dedicated DMA applied to the navigation system on chip(SoC)supports the data movement of the navigation channel of the whole system and the whole frequency point.After testing and verification,the clock cycle required by the DMA to move the same channel number of data is one-third of the CPU One,effectively improving the efficiency of the CPU.Low-power optimization technology is used in the design,after optimization,the dynamic power consumption of the DMA module is reduced to 15%of the original.

关 键 词：导航 SOC DMA 

分 类 号：TN492[电子电信—微电子学与固体电子学]