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由于USB接口广泛应用,现在众多SoC中都嵌入了USB IP核。但当前市场上的USB IP核一般仅仅针对某一种总线结构的SoC,可重用性不强。介绍了一款可配置的USB IP核设计,重点描述USB IP核的结构划分,详细阐述了各模块的设计思想。为了提高USB IP的可重用性,本USB IP核设计了总线适配器,经过简单配置可以用于AMBA ASB总线或WishBone总线结构的SoC中。此IP核进行了FPGA验证,验证结果表明他可作为一个独立的模块嵌入到SoC系统中。 相似文献
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高珮 《电信工程技术与标准化》2015,(3)
BSC A接口IP化后MGW与BSC之间通过IP承载网连接,不再设置TDM电路。因此,导致BSC A接口IP化后备选同步从MGW不可提取,时钟接入存在安全隐患。本文主要从时钟同步规范、时钟接入方案场景、时钟接入方案测试结果等方面进行论述,帮助设计人员在工程设计中合理的选择BSC时钟同步方案。 相似文献
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多IP核复用技术在SoC芯片设计中得到广泛应用,一方面带来设计效率的提高,另一方面由于各类IP核质量参差不齐也造成SoC芯片可靠性的降低,本文着重从微处理器可靠性、IP核通信可靠性、IP核状态检测等方面对多IP复用SoC的可靠性进行了研究。 相似文献
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本文根据SoC设计中对部分软核IP在布局布线上的特殊时序要求,提出一套有别于非独立的、基于特定SoC系统设计的软核IP快速硬核化和模型提取方法,有效地提高了SoC设计的效率和质量。 相似文献
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日立制作所中央研究所开发出一种可高速切换电路的动态可重构技术“FE—GA(flexible engine/genericALU array)”,并将其做成了IP核。该IP核的优势在于它能够集成到电视及DVD刻录机等对成本要求较高的SoC上,与以往的动态可重构技术相比,可大幅度缩小电路规模。 相似文献
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Elboim Y. Kolodny A. Ginosar R. 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2003,11(4):616-626
System-on-chip (SoC) design depends heavily on effective reuse of semiconductor intellectual property (IP). Clock distribution has become a problem for integrating IP cores into a single synchronous SoC, because of different clock delays in the IP cores. We propose an on-chip clock-tuning circuit, which enhances design flexibility. Programmable delays are inserted in the clock distribution network, such that clock alignment and synchronization are achieved. Design iterations are eliminated with the use of the tuning circuit, saving design effort, and cost. The method is also applicable to compensating for unbalanced clock trees. Hierarchical clock tuning can be implemented and can take advantage of the hierarchical structure of the SoC. Skew analysis has shown that the added programming unit outperforms other clock design options. The method was implemented in a commercial chip, and demonstrated good functionality with high productivity of the design flow. 相似文献
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随着半导体工艺的发展,片上系统(System-on-Chip, SoC)内部集成的不同功能IP(Intellectual Property)核越来越多。各IP核通过总线方式连接,多核同时抢占总线很大地制约了片上系统的性能。高效的总线仲裁器可以解决多核抢占总线引起的冲突和竞争问题,提升片上系统性能。该文提出一种改进的高速彩票总线仲裁器。使用4相双轨协议代替时钟实现彩票抽取机制以防止彩票丢弃,采用异步流水线交叉并行的工作方式以提升工作速度。在NINP(NonIdling and NonPreemptive)模型下通过65 nm CMOS工艺的Xilinx Virtex5板级验证,相比经典彩票仲裁器和动态自适应彩票仲裁器,具有更好的带宽分配功能,有效避免撑死和饿死现象,工作速度提高49.2%以上,具有一定的功耗优势,适用于有速度要求的多核片上系统。 相似文献
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Today’s SoC design demands efficient test access mechanism to develop and perform manufacturing test. Transparency based methods have their advantages for IP cores’ test reuse in SoC level. In this paper, an IP core transparency paths construction approach employing greedy search strategy based on gate-level heuristic information is proposed. With these transparency paths, IP cores can consecutively transfer one test per clock cycle from their inputs to outputs, and thus can be used in transparency-based test scheme to benefit at-speed testing and decrease the demand of parallel TAMs. The experimental results show lower extra overhead needed in our approach than conventional boundary scan and previous RT level approaches. 相似文献
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SoC(System-on-a-Chip)芯片设计中,由于芯片测试引脚数目的限制以及基于芯片性能的考虑,通常有一些端口不能进行测试复用的IP(Intellectual Property)核将不可避免地被集成在SoC芯片当中.对于端口非测试复用IP核,由于其端口不能被直接连接到ATE(Automatic Test Equipment)设备的测试通道上,由此,对端口非测试复用IP核的测试将是对SoC芯片进行测试的一个重要挑战.在本文当中,我们分别提出了一种基于V93000测试仪对端口非测试复用ADC(Analog-to-Digital Converter)以及DAC(Digital-to-Analog Converter)IP核的性能参数测试方法.对于端口非测试复用ADC和DAC IP核,首先分别为他们开发测试程序并利用V93000通过SoC芯片的EMIF(External Memory Interface)总线对其进行配置.在对ADC和DAC IP 核进行配置以后,就可以通过V93000捕获ADC IP 核采样得到的数字代码以及通过V93000 采样DAC IP 核转换得到的模拟电压值,并由此计算ADC以及DAC IP 核的性能参数.实验结果表明,本文分别提出的针对端口非测试复用ADC以及DAC IP 核测试方案非常有效. 相似文献
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The wide adoption of third-party hardware Intellectual Property (IP) cores including those from untrusted vendors have raised security concerns for system designers and end-users. Existing approaches to ensure the trustworthiness of individual IPs rarely consider the entire SoC design, especially the IP interactions through SoC bus. These methods can hardly identify malicious logic (or design flaws) distributed in multiple IPs whereas individual IPs fulfill security properties and can pass the security testing/verification. One possible solution is to treat the SoC as one IP core and try to verify security properties of the entire design. This method, however, suffers from scalability issues due to the large size of SoC designs with multiple IP cores integrated. In this paper, we present a scalable SoC bus verification framework trying to verify the security properties of SoC bus implementation where the bus protocol plays the role of the golden reference. More specifically, finite state machine (FSM) models will be constructed from the bus implementation and the trustworthiness will be verified based on the property set derived from the bus protocol and potential security threats. Along with IP level formal verification solutions, the proposed framework can help ensure the security of large-scale SoCs. Experimental results on ARM AMBA Bus demonstrate that our approach is applicable and scalable to prevent information leakage and denial-of-service (DoS) attack by verifying security properties. 相似文献
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一种基于嵌入式微处理器内核模块的测试 总被引:3,自引:1,他引:2
基于可复用的嵌入式IP内核模块的系统级芯片(SoC)设计方法使测试面临新的挑战。文章针对IP内核模块测试断面临的技术难点,介绍了IP核模块实现测试所需要构建的硬件环境和通用结构.并以嵌入ARM微处理器棱的SoC为例,提出了具体的测试解决方案。 相似文献
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文章设计了一款基于开源IP核的SoC视频解码平台,该平台中使用的IP均经过了CQIP系统的严格评测,并在Xilinx公司的FPGA上进行了验证,实验结果证明该系统具有良好的实时性和较低的功耗,非常适合于便携式设备。 相似文献