Nios II 软件开发人员手册中的缓存和紧耦合存储器部分 Nios® II embedded processor cores can contain instruction and data caches. This chapter discusses cache-related issues that you need to consider to guarantee that your program executes correctly on the Nios II processor. Fortunately, most software based on the Nios II hardware abstraction layer (HAL) works correctly without any special accommodations for caches. However, some software must manage the cache directly. For code that needs direct control over the cache, the Nios II architecture provides facilities to perform the following actions:
上传时间： 2013-10-25
上传用户：虫虫虫虫虫虫
This application note shows how to achieve low-cost, efficient serial configuration for Spartan FPGA designs. The approachrecommended here takes advantage of unused resources in a design, thereby reducing the cost, part count, memory size,and board space associated with the serial configuration circuitry. As a result, neither processor nor PROM needs to be fullydedicated to performing Spartan configuration.In particular, information is provided on how the idle processing time of an on-board controller can be used to loadconfiguration data from an off-board source. As a result, it is possible to upgrade a Spartan design in the field by sending thebitstream over a network.
上传时间： 2013-11-01
上传用户：wojiaohs
Today’s digital systems combine a myriad of chips with different voltage configurations.Designers must interface 2.5V processors with 3.3V memories—both RAM and ROM—as wellas 5V buses and multiple peripheral chips. Each chip has specific power supply needs. CPLDsare ideal for handling the multi-voltage interfacing, but do require forethought to ensure correctoperation.
上传时间： 2013-11-10
上传用户：yy_cn
Calculation of the Differential Impedance of Tracks on FR4 substrates There is a discrepancy between calculated and measured values of impedance for differential transmission lineson FR4. This is especially noticeable in the case of surface microstrip configurations. The anomaly is shown tobe due to the nature of the substrate material. This needs to be considered as a layered structure of epoxy resinand glass fibre. Calculations, using Boundary Element field methods, show that the distribution of the electricfield within this layered structure determines the apparent dielectric constant and therefore affects theimpedance. Thus FR4 cannot be considered to be uniform dielectric when calculating differential impedance.
上传时间： 2013-10-18
上传用户：masochism
Logger iButton devices have gained a lot of popularity with researchers. Although free evaluation software is easy to use and welldocumented, the choices and inputs that need to be made can sometimes be challenging. This application note explains technicalterms that are common with temperature logger iButtons and how they relate to each other. Additionally, it presents an algorithm tohelp users choose the necessary input parameters, including the sample rate based on a user's needs and the available memory tostore the data.
上传时间： 2013-11-16
上传用户：xywhw1
工具分类：攻击程序 运行平台：Windows 工具大小：7577 Bytes 文件MD5 ：28f6d5f4d818438522a3d0dc8a3fa46b 工具来源：securiteam.com // GDI+ buffer overrun exploit by FoToZ // NB: the headers here are only sample headers taken from a .JPG file, // with the FF FE 00 01 inserted in header1. // Sample shellcode is provided // You can put approx. 2500 bytes of shellcode...who needs that much anyway // Tested on an unpatched WinXP SP1
标签： 818438522a d818438522 securiteam 818438522
上传时间： 2015-01-20
上传用户：Late_Li
dances Act now and you ll be given a free membership to a top Internet firm who is changing people s lives for the better.Mary L. White of LA. stays at home with her children and works just 3 1/2 hours a day... she now earns twice as much money as she did before. Frank Herns Jr. of NY takes 2 vacations a year to the Caribbean and enjoys more time and freedom than ever before. Jane Kennedy of FL fired her boss after 5 months. She finally has the time and money she needs to complete her college education. Craig Garcia of CA tripled his income in just 90 days because took advantage of his free membership.
标签： membership Internet changing dances
上传时间： 2015-03-08
上传用户：xhz1993
This an adaptive receiver for a direct-sequence spread spectrum (DS-SS) system over an AWGN channel. The adaptive receiver block is modified from the LMS adaptive filter block in DSP Blockset. For DS-SS signal reception, the adaptive filter needs to have multi-rate operation. The input sample rate is equal to chip rate and the output is at symbol rate. Two rates are related by PG, processing gain
标签： direct-sequence adaptive receiver spectrum
上传时间： 2014-01-16
上传用户：D&L37
OXCC is a multipass, interpreting C compiler with several language extensions. It generates an Architecture Neutral Format (ANF) output and comes with a couple of example back ends. Programmers are expected to write additional back ends for their specific needs.
标签： interpreting extensions generates multipass
上传时间： 2015-04-12
上传用户：大三三
Beginning with an introduction to 802.11b in general, 802.11 Security gives you a broad basis in theory and practice of wireless security, dispelling some of the myths along the way. In doing so, they provide you with the technical grounding required to think about how the rest of the book applies to your specific needs and situations. If you are a network, security, or systems engineer, or anyone interested in deploying 802.11b--based systems, you ll want this book beside you every step of the way.
标签： 802.11 introduction Beginning Security
上传时间： 2013-12-04
上传用户：CHINA526
