FT-XV抗辐射多核处理器物理设计中串扰的研究与优化

发布时间：2018-01-25 09:28

本文关键词： 集成电路串扰物理设计抗辐射　出处：《国防科学技术大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着特征尺寸的不断缩小和工作频率的不断提高，串扰已经成为集成电路设计中的关键问题。串扰对电路的影响主要表现在两个方面：一是会引起时序的变化，造成建立时间或者保持时间的违反；二是会引起毛刺噪声，严重的时候会造成电路功能的错误。 FT-XV是国防科技大学计算机学院研制的一款宇航用多核处理器。因该处理器的应用目标是各类卫星，为了能在太空复杂的电磁环境中稳定可靠的工作，FT-XV不仅要具备抗空间粒子的辐射能力，同时也应该有很强的抗串扰噪声能力。本文以FT-XV抗辐射处理器的研制工程为背景，就物理设计中遇到的串扰问题展开研究，完成的主要工作如下： 1）利用SPICE模拟器，，基于130nm工艺全面研究了串扰与耦合电容、信号跳变时间及方向、信号的驱动及负载能力、并行金属导线长度之间的关系，获得了以上因素对串扰影响的变化规律。这些研究成果对FT-XV处理器物理设计中串扰的预防和修复起到了理论指导作用。 2）总结出一套控制串扰的物理设计流程，包括串扰预防、串扰分析和串扰修复。其中，串扰预防是整个设计的核心。通过在逻辑综合中设置合理的信号跳变时间、驱动和负载大小等约束；在布局规划中控制布线拥塞；在时钟网络综合时控制耦合电容大小等手段，大大降低了串扰的影响。 3）使用sign-off级的串扰分析工具PrimeTimeSI进行了串扰的静态时序分析；对于详细布线后出现的时序违反，通过增强受扰线上单元的驱动能力和插入缓冲器等方法进行串扰的修复。 4）完成了FT-XV的后端物理设计，将串扰带来的不利影响控制在要求的范围内，在因加固设计引入很大延迟的情况下仍达到了120MHz的设计目标。
[Abstract]:With the constant reduction of feature size and the continuous improvement of working frequency, crosstalk has become a key problem in integrated circuit design. The influence of crosstalk on the circuit is mainly reflected in two aspects: first, it will cause the change of time sequence. A violation of the establishment or maintenance time; Second, it will cause burr noise, when serious will cause circuit function error. FT-XV is an aerospace multi-core processor developed by the computer School of National University of National Defense Science and Technology. Because the application of the processor is aimed at all kinds of satellites, in order to be able to work stably and reliably in the complex electromagnetic environment in space. FT-XV should not only have the ability to resist radiation of space particles, but also have strong ability to resist crosstalk noise. The background of this paper is the development of FT-XV anti-radiation processor. The crosstalk problem in physical design is studied. The main work accomplished is as follows: 1) based on the SPICE simulator, the crosstalk and coupling capacitors, the jump time and direction of the signal, the driving and load capacity of the signal are studied comprehensively based on the 130nm process. The relationship between the length of parallel metal conductors. The effects of the above factors on crosstalk are obtained, and these results provide theoretical guidance for the prevention and repair of crosstalk in the physical design of FT-XV processors. 2) summarize a set of physical design flow of crosstalk control, including crosstalk prevention, crosstalk analysis and crosstalk repair. Crosstalk prevention is the core of the whole design. Control routing congestion in layout planning; The influence of crosstalk is greatly reduced by controlling the coupling capacitance during clock network synthesis. 3) the static timing analysis of crosstalk is carried out by using sign-off level crosstalk analysis tool PrimeTimeSI. The crosstalk is repaired by enhancing the driving ability of the unit on the disturbed line and inserting buffer. 4) the back-end physical design of FT-XV is completed, and the adverse effects of crosstalk are controlled within the required range. The design goal of 120MHz has been achieved even though the reinforcement design is delayed.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP332

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