Express Mode uses an 8-bit wide bus path for fast configuration of Xilinx FPGAs. Thisapplication note provides information on how to perform Express configuration specifically forthe Spartan™-XL family. The Express mode signals and their associated timing are defined.The steps of Express configuration are described in detail, followed by detailed instructions thatshow how to implement the configuration circui
標簽： Spartan-XL Express XAPP FPGA
上傳時間： 2015-01-02
上傳用戶：nanxia
This application note covers the design considerations of a system using the performance features of the LogiCORE™ IP Advanced eXtensible Interface (AXI) Interconnect core. The design focuses on high system throughput through the AXI Interconnect core with F MAX and area optimizations in certain portions of the design. The design uses five AXI video direct memory access (VDMA) engines to simultaneously move 10 streams (five transmit video streams and five receive video streams), each in 1920 x 1080p format, 60 Hz refresh rate, and up to 32 data bits per pixel. Each VDMA is driven from a video test pattern generator (TPG) with a video timing controller (VTC) block to set up the necessary video timing signals. Data read by each AXI VDMA is sent to a common on-screen display (OSD) core capable of multiplexing or overlaying multiple video streams to a single output video stream. The output of the OSD core drives the DVI video display interface on the board. Performance monitor blocks are added to capture performance data. All 10 video streams moved by the AXI VDMA blocks are buffered through a shared DDR3 SDRAM memory and are controlled by a MicroBlaze™ processor. The reference system is targeted for the Virtex-6 XC6VLX240TFF1156-1 FPGA on the Xilinx® ML605 Rev D evaluation board
上傳時間： 2013-11-23
上傳用戶：shen_dafa
隨著系統設計復雜性和集成度的大規模提高，電子系統設計師們正在從事100MHZ以上的電路設計，總線的工作頻率也已經達到或者超過50MHZ，有一大部分甚至超過100MHZ。目前約80% 的設計的時鐘頻率超過50MHz，將近50% 以上的設計主頻超過120MHz，有20%甚至超過500M。當系統工作在50MHz時，將產生傳輸線效應和信號的完整性問題；而當系統時鐘達到120MHz時，除非使用高速電路設計知識，否則基于傳統方法設計的PCB將無法工作。因此，高速電路信號質量仿真已經成為電子系統設計師必須采取的設計手段。只有通過高速電路仿真和先進的物理設計軟件，才能實現設計過程的可控性。傳輸線效應基于上述定義的傳輸線模型，歸納起來，傳輸線會對整個電路設計帶來以下效應。 · 反射信號Reflected signals · 延時和時序錯誤Delay & timing errors · 過沖(上沖/下沖)Overshoot/Undershoot · 串擾Induced Noise (or crosstalk) · 電磁輻射EMI radiation
上傳時間： 2013-11-05
上傳用戶：tzrdcaabb
This document provides practical, common guidelines for incorporating PCI Express interconnect layouts onto Printed Circuit Boards (PCB) ranging from 4-layer desktop baseboard designs to 10- layer or more server baseboard designs. Guidelines and constraints in this document are intended for use on both baseboard and add-in card PCB designs. This includes interconnects between PCI Express devices located on the same baseboard (chip-to-chip routing) and interconnects between a PCI Express device located “down” on the baseboard and a device located “up” on an add-in card attached through a connector. This document is intended to cover all major components of the physical interconnect including design guidelines for the PCB traces, vias and AC coupling capacitors, as well as add-in card edge-finger and connector considerations. The intent of the guidelines and examples is to help ensure that good high-speed signal design practices are used and that the timing/jitter and loss/attenuation budgets can also be met from end-to-end across the PCI Express interconnect. However, while general physical guidelines and suggestions are given, they may not necessarily guarantee adequate performance of the interconnect for all layouts and implementations. Therefore, designers should consider modeling and simulation of the interconnect in order to ensure compliance to all applicable specifications. The document is composed of two main sections. The first section provides an overview of general topology and interconnect guidelines. The second section concentrates on physical layout constraints where bulleted items at the beginning of a topic highlight important constraints, while the narrative that follows offers additional insight.
上傳時間： 2014-01-24
上傳用戶：s363994250
上傳時間： 2013-11-01
上傳用戶：ouyang426
One of the most important issues affecting the implementation of microcontroller software deals with the data-decision algorithm. Data-decision refers to decoding the DIO-pin from the CC400/CC900. Two main principles exist for decoding Manchester-coded data: Data decision based on timing the period between transitions, and data decision based on oversampling.
標簽： microcontroller implementation important affecting
上傳時間： 2013-12-18
上傳用戶：671145514
This project is created using the Keil ARM CA Compiler. The Logic Analyzer built into the simulator may be used to monitor and display any variable or peripheral I/O register. It is already configured to show the PWM output signal on PORT3.0 and PORT3.1 This ARM Example may be debugged using only the uVision Simulator and your PC--no additional hardware or evaluation boards are required. The Simulator provides cycle-accurate simulation of all on-chip peripherals of the ADuC7000 device series. You may create various input signals like digital pulses, sine waves, sawtooth waves, and square waves using signal functions which you write in C. Signal functions run in the background in the simulator within timing constraints you configure. In this example, several signal functions are defined in the included Startup_SIM.INI file.
標簽： the Analyzer Compiler project
上傳時間： 2013-12-19
上傳用戶：Yukiseop
Attributes, Constraints, and Carry Logic Overview Information for Mentor Customers Schematic Syntax UCF/NCF File Syntax Attributes/Logical Constraints Placement Constraints Relative Location (RLOC) Constraints timing Constraints Physical Constraints Relationally Placed Macros (RPM) Carry Logic in XC4000 FPGAs Carry Logic in XC5200 FPGAs
標簽： Constraints Information Attributes Customers
上傳時間： 2015-05-12
上傳用戶：cc1015285075
A new blind adaptive multiuser detection scheme based on a hybrid of Kalman filter and subspace estimation is proposed. It is shown that the detector can be expressed as an anchored signal in the signal subspace and the coefficients can be estimated by the Kalman filter using only the signature waveform and the timing of the desired user.
標簽： multiuser detection adaptive subspace
上傳時間： 2015-09-07
上傳用戶：xieguodong1234
各種video的標準，同時包含一些timing的解釋，是個簡單的介紹型文檔
上傳時間： 2013-12-08
上傳用戶：exxxds
