Universal Serial Bus (USB) is a communications architecture that gives a personal computer (PC) the ability to interconnect a variety of devices using a simple four- wire cable. The USB is actually a two-wire serial communication link that runs at either 1.5 or 12 megabits per second (mbs). USB protocols can configure devices at startup or when they are plugged in at run time. These devices are broken into various device classes. Each device class defines the common behavior and protocols for devices that serve similar functions. Some examples of USB device classes are shown in the following table
標(biāo)簽： communications architecture Universal computer
上傳時(shí)間： 2015-12-08
上傳用戶：stvnash
該軟件提供了編輯、編譯、運(yùn)行、調(diào)試匯編語言程序的集成環(huán)境。目前支持MASM、TASM、MCS51三種編譯器。第一次使用時(shí)，要現(xiàn)在選項(xiàng)菜單中選擇您所使用的編譯器類型及其目錄所在。 bin目錄里為本軟件 files目錄為匯編語言寫的用于測試的程序 source目錄為本軟件的源代碼 masm為MASM類型的編譯器，其中：masm.exe為編譯器，link.exe為連接器
上傳時(shí)間： 2013-12-19
上傳用戶：wqxstar
The Original USB 2.0 specification released on April 27, 2000 Errata to the USB 2.0 specification as of December 7, 2000 Mini-B connector Engineering Change Notice to the USB 2.0 specification. Pull-up/pull-down Resistors Engineering Change Notice to the USB 2.0 specification. Errata to the USB 2.0 specification as of May 28, 2002 Interface Association Descriptor Engineering Change Notice to the USB 2.0 specification. Rounded Chamfer Engineering Change Notice to the USB 2.0 specification as of October 8, 2003 Unicode Engineering Change Notice to the USB 2.0 specification as of February 21, 2005 Inter-Chip USB Supplement Revision 1.0 as of March 13, 2006 Revision 1.3 of the USB On-The-Go Supplement as of December 5, 2006 Revision 1.01 of the Micro-USB Cables and Connectors Specification as of April 4, 2007 USB 2.0 Link Power Management Addendum Engineering Change Notice to the USB 2.0 specification as of July 16, 2007.
標(biāo)簽： specification 2.0 USB Original
上傳時(shí)間： 2013-12-31
上傳用戶：familiarsmile
phpBook 是個(gè)建立於 PHP 及 MySQL 的留言板。 功能包括: -- 內(nèi)建多種語法 (包括中文) -- IP 封鎖及禁止存取 -- 可自訂表情符號 -- URL-Code，包括 URL-Link s, URL-Picture s -- 自訂禁止字句 -- 防止惡意灌水式攻擊
標(biāo)簽： URL-Code phpBook MySQL PHP
上傳時(shí)間： 2013-12-16
上傳用戶：dongbaobao
C語言進(jìn)階,包含以下的內(nèi)容:C語言進(jìn)階－第一講概述.pdf\C語言進(jìn)階－第二講C語言復(fù)習(xí).pdf\C語言進(jìn)階－第三講編譯匯編調(diào)試.pdf\C語言進(jìn)階－第四講存儲器與指針.pdf\C語言進(jìn)階－第五講 數(shù)據(jù)結(jié)構(gòu)與鏈表.pdf\C語言進(jìn)階－第六講中斷與驅(qū)動(dòng).pdf\C語言進(jìn)階－第七講編碼風(fēng)格.pdf\C語言進(jìn)階－第八講編寫安全無錯(cuò)的代碼.pdf\C語言進(jìn)階-lmalloc 第四講代碼.rar\C語言進(jìn)階－ASIX Win link list 第五講代碼.rar
上傳時(shí)間： 2016-01-16
上傳用戶：pinksun9
This m-file simulates MPSK (BPSK,QPSK,8PSK)with theoretical and simulated results using Gray coding. Numerical examples of a satellite link design are shown using QPSK and/or 8PSK when the bit rate(Rb)is greater than the channel bandwidth Wc (Band-limited channel).
標(biāo)簽： theoretical simulates simulated results
上傳時(shí)間： 2016-01-19
上傳用戶：pompey
Atmel AT91SAM7SE256的一些基本驅(qū)動(dòng)代碼， 包括Link Files, 中斷源配置， SDRAM, USART, Timer等外設(shè)的驅(qū)動(dòng)代碼。可用于AT91SAM7SE系列處理器。
上傳時(shí)間： 2013-12-20
上傳用戶：zjf3110
Introduction A shared library is a collection of functions that are available for use by one or more applications running on a system. On Windows operating systems, the library is compiled into a dynamic link library (.dll) file. At run-time, the library is loaded into memory and made accessible to all applications.
標(biāo)簽： Introduction collection available functions
上傳時(shí)間： 2014-01-26
上傳用戶：2467478207
This Microsoft(R) Macro Assembler Reference lists all MASM instructions, directives, statements, and operators. It also serves as a quick reference to the Programmer’s WorkBench commands, and the commands for Microsoft utilities such as LINK and LIB. This book documents features of MASM version 6.1, and is part of a complete MASM documentation set.
標(biāo)簽： instructions directives statements Microsoft
上傳時(shí)間： 2016-01-31
上傳用戶：asddsd
老外的超高效率壓縮，High efficient Data Compression Library for use with Delphi. Support Rank, ZIP, BZIP and PPM compression algorithms. Compression ratio more than 1.5-2 times better than ZIP/RAR archiver. Compression speed up to 8 Mb/sec (on PIII-600).
標(biāo)簽： 高效率
上傳時(shí)間： 2014-01-02
上傳用戶：athjac
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