搜索结果
找到约 618 项符合
second-CLOCK 的查询结果
可编程逻辑 XAPP228 -Virtex器件内的四端口存储器
This application note describes how the existing dual-port block memories in the Spartan™-IIand Virtex™ families can be used as Quad-Port memories. This essentially involves a dataaccess time (halved) versus functionality (doubled) trade-off. The overall bandwidth of the blockmemory in ...
可编程逻辑 XAPP806 -决定DDR反馈时钟的最佳DCM相移
This application note describes how to build a system that can be used for determining theoptimal phase shift for a Double Data Rate (DDR) memory feedback clock. In this system, theDDR memory is controlled by a controller that attaches to either the OPB or PLB and is used inan embedded microproces ...
可编程逻辑 XAPP708 -133MHz PCI-X到128MB DDR小型DIMM存储器桥
 
The Virtex-4 features, such as the programmable IDELAY and built-in FIFO support, simplifythe bridging of a high-speed, PCI-X core to large amounts of DDR-SDRAM memory. Onechallenge is meeting the PCI-X target initial latency specification. PCI-X Protocol Addendum tothe PCI Local Bus Spec ...
可编程逻辑 数字与模拟电路设计技巧
数字与模拟电路设计技巧IC与LSI的功能大幅提升使得高压电路与电力电路除外，几乎所有的电路都是由半导体组件所构成，虽然半导体组件高速、高频化时会有EMI的困扰，不过为了充分发挥半导体组件应有的性能，电路板设计与封装技术仍具有决定性的影响。 模拟与数字技术的融合由于IC与LSI半导体本身的高速化，同时为了使机器达到 ...
可编程逻辑 基于Verilog HDL设计的多功能数字钟
本文利用Verilog HDL 语言自顶向下的设计方法设计多功能数字钟，突出了其作为硬件描述语言的良好的可读性、可移植性和易理解等优点，并通过Altera QuartusⅡ 4.1 和ModelSim SE 6.0 完成综合、仿真。此程序通过下载到FPGA 芯片后，可应用于实际的数字钟显示中。
关键词：Verilog HDL；硬件描述语言；FPGA
Abstract: In this ...
可编程逻辑 开关电源EMI设计(英文版)
Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic Institute and State Universityin partial fulfillment of the requirements for the degree of
Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This wor ...
可编程逻辑 pcb layout规则
LAYOUT REPORT .............. 1
 
目錄.................. 1
 
 
1. PCB LAYOUT 術語解釋(TERMS)......... 2
 
 
2. Test Point : ATE 測試點供工廠ICT 測試治具使用............ 2
 
 
3. 基準點 (光學點) -for SMD:........... 4
 
 
4. ...
可编程逻辑 pci e PCB设计规范
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 b ...
可编程逻辑 8259 VHDL代码
a8259 可编程中断控制 altera提供
The a8259 is designed to simplify the implementation of the interrupt interface  in 8088 and 8086  based microcomputer systems. The device is known as a programmable interrupt controller.  The a8259 receives and prioritizes up to 8 interrupts,  ...
测试测量 集合式直流电能表（小功率的）
集合式直流电能表（小功率的） 特点： 精确度0.05%满刻度±1位数 可同时量测与显示/直流电压/电流/瓦特（千瓦）/瓦特小时（千瓦小时） 电压输入（DC0-99.99V/0-600.0V）自动变档功能 显示范围0-9999(电流/瓦特/千瓦),0至99999999(八位數瓦特小时)可任意规划 数位RS-485 界面 (Optional) 主要规格： 辅助电源消耗功率 ...