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 SpecificATion Revision 2.0a ([Ref 6]) dictates that when a target signals adata transfer, "the target must do so within 16 clocks of the assertion of FRAME#." PCItermination transactions, such as Split Response/Complete, are commonly used to meet thelatency SpecificATions. This method adds complexity to the design, as well as additional systemlatency. Another solution is to increase the ratio of the memory frequency to the PCI-X busfrequency. However, this solution increases the required power and clock resource usage.
上传时间： 2013-11-24
上传用户：18707733937
Xilinx is disclosing this user guide, manual, release note, and/or SpecificATion (the “Documentation”) to you solely for use in the development of designs to operate with Xilinx hardware devices. You may not reproduce, distribute, republish, download, display, post, or transmit the Documentation in any form or by any means including, but not limited to, electronic, mechanical, photocopying, recording, or otherwise, without the prior written consent of Xilinx. Xilinx expressly disclaims any liability arising out of your use of the Documentation. Xilinx reserves the right, at its sole discretion, to change the Documentation without notice at any time. Xilinx assumes no obligation to correct any errors contained in the Documentation, or to advise you of any corrections or updates. Xilinx expressly disclaims any liability in connection with technical support or assistance that may be provided to you in connection with the Information.
标签： CPLD
上传时间： 2014-12-05
上传用户：qazxsw
Silicon Motion, Inc. has made best efforts to ensure that the information contained in this document is accurate andreliable. However, the information is subject to change without notice. No responsibility is assumed by SiliconMotion, Inc. for the use of this information, nor for infringements of patents or other rights of third parties.Copyright NoticeCopyright 2002, Silicon Motion, Inc. All rights reserved. No part of this publication may be reproduced, photocopied,or transmitted in any form, without the prior written consent of Silicon Motion, Inc. Silicon Motion, Inc. reserves theright to make changes to the product SpecificATion without reservation and without notice to our users
标签： GUIDELINES LAYOUT 320 PCB
上传时间： 2013-10-10
上传用户：manga135
为了改进产品性能和兼容性，最新的HDMI compliance test SpecificATion (HDMI CTS) V.1.3增加了新的测试内容和定下了更严格的标准。大多数现在递交给HDMI授权测试中心(ATC) 的带有HDMI功能的电器都将按照HDMI CTS V.1.3 来测试。Analog Devices (ADI) 分别在美国的绿堡(Greensboro，NC), 东京, 台湾和北京设立了四家预测试中心为客户提供HDMI CT 测试以缩短客户产品上市的时间。在本文中我们将讨论HDMI CTS V.1.3新增加的一些重要内容。同时我们也将着重总结一些典型测试项目失败的原因和可能的修改方案。
上传时间： 2013-12-15
上传用户：古谷仁美
SL811开发资料_包含源程序_电路图_芯片资料:SL811HS Embedded USB Host/Slave Controller.The SL811HS is an Embedded USB Host/Slave Controller capable of communicate with either full-speed or low-speed USB peripherals. The SL811HS can interface to devices such as microprocessors, microcontrollers, DSPs, or directly to a variety of buses such as ISA, PCMCIA, and others. The SL811HS USB Host Controller conforms to USB SpecificATion 1.1.The SL811HS USB Host/Slave Controller incorporates USB Serial Interface functionality along with internal full-/low-speed transceivers.The SL811HS supports and operates in USB full-speed mode at 12 Mbps, or at low-speed 1.5-Mbps mode.The SL811HS data port and microprocessor interface provide an 8-bit data path I/O or DMA bidirectional, with interrupt support to allow easy interface to standard microprocessors or microcontrollers such as Motorola or Intel CPUs and many others. Internally,the SL811HS contains a 256-byte RAM data buffer which is used for control registers and data buffer.The available package types offered are a 28-pin PLCC (SL811HS) and a 48-pin TQFP package (SL811HST-AC). Both packages operate at 3.3 VDC. The I/O interface logic is 5V-tolerant.
上传时间： 2013-12-22
上传用户：a82531317
ECHNICAL COMMITTEE No. 65: INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL WORKING GROUP 6 VOTING DRAFT - PUBLICLY AVAILABLE SpecificATion - FUNCTION BLOCKS FOR INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL SYSTEMS
标签： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上传时间： 2014-10-28
上传用户：源弋弋
ECHNICAL COMMITTEE No. 65: INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL WORKING GROUP 6 VOTING DRAFT - PUBLICLY AVAILABLE SpecificATion - FUNCTION BLOCKS FOR INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL SYSTEMS
标签： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上传时间： 2015-02-11
上传用户：baiom
ECHNICAL COMMITTEE No. 65: INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL WORKING GROUP 6 VOTING DRAFT - PUBLICLY AVAILABLE SpecificATion - FUNCTION BLOCKS FOR INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL SYSTEMS
标签： INDUSTRIAL-PROCESS MEASUREMENT COMMITTEE ECHNICAL
上传时间： 2013-12-27
上传用户：frank1234
OSERL (Open SMPP Erlang Library) is an erlang implementation of the Short Message Peer to Peer protocol, covering the entire SpecificATion (version 5.0). Forward and backward compatibilities guidelines were adopted.
标签： Peer implementation Library Message
上传时间： 2013-12-29
上传用户：dengzb84
Pocket SIP Messenger is a SIP instant messaging client for small devices that use Windows CE (iPAQ Pocket PC, ...). The IM protocol is based on SIMPLE (IETF) working group s SpecificATion.
标签： Messenger SIP messaging instant
上传时间： 2015-03-13
上传用户：lyy1234
