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
SL811開發資料_包含源程序_電路圖_芯片資料: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.
上傳時間： 2013-12-22
上傳用戶：a82531317
PhpDig is a search engine written in PHP that uses a MySQL database backend. It features indexing of Both static and dynamic pages, spidering of almost all links in HTML content, in hrefs, areamaps, and frames, and full text indexing. The search results appearence is skin-able, using a very simple templates system. PhpDig是一個用PHP編寫的搜索引擎，它使用MySQL數據庫后臺。它的功能有靜態和動態頁面索引，在HTML內容中用hrefs, areamaps，和frames以及全文本索引構成所有的鏈接網。搜索結果的外觀是可定制外觀的，使用一個非常簡單的模板系統。
標簽： database features indexing backend
上傳時間： 2014-01-03
上傳用戶：haohaoxuexi
項目描述: slsnif is a serial port logging utility. It listens to the specified serial port and logs all data going through this port in Both directions. Serial line sniffer是一個串行端口記錄工具。它監聽指定的串行端口并記錄所有通過這個端口的兩個方向的數據。 來源：http://freshmeat.net slsnif是一個串行端口日志工具。它監聽特殊的串口，記錄所有通過這具串口的兩個方向的數據。 類別: Development Status: 5 - Production/StableEnvironment: Console (Text Based)Intended Audience: DevelopersLicense: GNU General Public License (GPL)Operating System: LinuxProgramming Language: CTopic: Communications, Debuggers
標簽： serial port specified logging
上傳時間： 2014-01-17
上傳用戶：許小華
項目描述: slsnif is a serial port logging utility. It listens to the specified serial port and logs all data going through this port in Both directions. Serial line sniffer是一個串行端口記錄工具。它監聽指定的串行端口并記錄所有通過這個端口的兩個方向的數據。 來源：http://freshmeat.net slsnif是一個串行端口日志工具。它監聽特殊的串口，記錄所有通過這具串口的兩個方向的數據。 類別: Development Status: 5 - Production/StableEnvironment: Console (Text Based)Intended Audience: DevelopersLicense: GNU General Public License (GPL)Operating System: LinuxProgramming Language: CTopic: Communications, Debuggers
標簽： serial port specified logging
上傳時間： 2013-12-12
上傳用戶：silenthink
ATmega8 taillight circuitA more complex C program that implements different flashing patterns under the control of Both the push buttons and potentiometer. Use your imagination to come up with some novel ideas here. Remember however that more marks are to be awarded for the quality of the code than for the novelness of the patterns.
標簽： implements taillight different circuitA
上傳時間： 2013-11-27
上傳用戶：zhuimenghuadie
Addfilter is a command-line application which adds and removes filter drivers for a given drive or volume. It is intended to demonstrate how to insert a filter driver into the driver stack of a device. The sample illustrates how to do this by using the SetupDi APIs. The sample works on Both x86 and Alpha platforms. It has only been tested in a 32-bit environment. Since Addfilter is not a driver, it does not deal with Plug and Play or Power Management.
標簽： command-line application Addfilter drivers
上傳時間： 2013-12-30
上傳用戶：天誠24
CBC下寫的串口編程，API函數實例 I wish this site had been around when I was trying to figure out how to make serial communications work in Windows95. I, like many programmers, was hit with the double-whammy of having to learn Windows programming and Win95 serial comm programming at the same time. I found Both tasks confusing at best. It was particularly frustrating because I had, over the years, written so much stuff (including lots of serial comm software) for the DOS environment and numerous embedded applications. Interrupt driven serial comm, DMA transfer serial comm, TSR serial comm, C, assembler, various processors... you name it, it had written it. Yet, everything I knew seemed upside-down in the message-driven-callback world of Windows.
上傳時間： 2014-06-20
上傳用戶：cccole0605
The following Philips LPC2k CAN examples in this directory were provided by ESAcademy. LPC2_CANAll_V110: Receives all CAN messages in a receive queue. LPC2_CANFull_V110: Uses Full-CAN-like reception filtering. LPC2_CANBlinky_V130: Minimal example of MicroCANopen, uses Full-CAN-like reception filtering and implements Both Rx and Tx Interrupt Service Routines.
標簽： ESAcademy following directory examples
上傳時間： 2015-04-25
上傳用戶：hasan2015
The following Philips LPC2k CAN examples in this directory were provided by ESAcademy. LPC2_CANAll_V110: Receives all CAN messages in a receive queue. LPC2_CANFull_V110: Uses Full-CAN-like reception filtering. LPC2_CANBlinky_V130: Minimal example of MicroCANopen, uses Full-CAN-like reception filtering and implements Both Rx and Tx Interrupt Service Routines.
標簽： ESAcademy following directory examples
上傳時間： 2013-12-13
上傳用戶：牛津鞋
