a8259 可編程中斷控制 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, and in the cascade mode, this can be expanded up to 64 interrupts. An asynchronous reset and a clock input have been added to improve operation and reliability.
上傳時(shí)間： 2015-01-02
上傳用戶：panpanpan
Modern electronic systems solve so many difficult problems that they often seem like magic. Nonetheless, these systems all have thesame basic limitation: they need a source of electrical power! Most of the time this is a straightforward challenge for the electronicdesigner, because there are many power-delivery solutions. Yet sometimes a device has no direct power source, and running wiresor replacing batteries is impractical. Even when long-life batteries are usable, they eventually need to be replaced, which requires aservice call.
標(biāo)簽： 能量收集
上傳時(shí)間： 2015-01-03
上傳用戶：zukfu
The high defi nition multimedia interface (HDMI) is fastbecoming the de facto standard for passing digitalaudio and video data in home entertainment systems.This standard includes an I2C type bus called a displaydata channel (DDC) that is used to pass extended digitalinterface data (EDID) from the sinkdevice (such as adigital TV) to the source device (such as a digital A/Vreceiver). EDID includes vital information on the digitaldata formats that the sink device can accept. The HDMIspecifi cation requires that devices have less than 50pFof input capacitance on their DDC bus lines, which canbe very diffi cult to meet. The LTC®4300A’s capacitancebuffering feature allows devices to pass the HDMI DDCinput capacitance compliance test with ease.
上傳時(shí)間： 2013-11-21
上傳用戶：tian126vip
USB接口
上傳時(shí)間： 2013-10-18
上傳用戶：smallfish
A collection of interface applications between various microprocessors/ controllers and the LTC1090 family of data acquisition systems. The note is divided into sections specific to each interface.
上傳時(shí)間： 2013-11-08
上傳用戶：sssnaxie
利用EZ-USB接口芯片AN2131Q實(shí)現(xiàn)了基于TMS320C5409的水聲信號(hào)采集及混沌特性研究系統(tǒng)中的高速數(shù)據(jù)通信，提出了一種采用FIFO緩存芯片實(shí)現(xiàn)AN2131Q與TMS320C5409的連接方法，深入研究了EZ-USB序列接口芯片的固件、設(shè)備驅(qū)動(dòng)和用戶程序開(kāi)發(fā)過(guò)程。關(guān)鍵詞：AN2131Q; TMS320C5409; IDT72V02；數(shù)據(jù)通信ABSTRACT: Using AN2131Q as the control chip, the communication between DSP and PC in the underwater acoustic signal acquisition and chaotic characteristics study system is realized. The method is proposed that using FIFO to realize the connectivity between AN2131Q and TMS320C5409. The development of programming Firmware、device driver and user application are thoroughly researched.Key words: AN2131Q; TMS320C5409; IDT72V02; data communication
標(biāo)簽： EZ-USB 數(shù)據(jù)傳輸 接口設(shè)計(jì)
上傳時(shí)間： 2014-04-03
上傳用戶：hahayou
基本的編輯工具(GENERAL EDITING FACILITIES) 對(duì)象放置(Object Placement) ISIS支持多種類(lèi)型的對(duì)象，每一類(lèi)型對(duì)象的具體作用和功能將在下一章給出。雖然類(lèi)型不同，但放置對(duì)象的基本步驟都是一樣的。 放置對(duì)象的步驟如下(To place an object:) 1.根據(jù)對(duì)象的類(lèi)別在工具箱選擇相應(yīng)模式的圖標(biāo)(mode icon)。 2. Select the sub-mode icon for the specific type of object. 2、根據(jù)對(duì)象的具體類(lèi)型選擇子模式圖標(biāo)(sub-mode icon)。 3、如果對(duì)象類(lèi)型是元件、端點(diǎn)、管腳、圖形、符號(hào)或標(biāo)記，從選擇器里(selector)選擇你想要的對(duì)象的名字。對(duì)于元件、端點(diǎn)、管腳和符號(hào)，可能首先需要從庫(kù)中調(diào)出。 4、如果對(duì)象是有方向的，將會(huì)在預(yù)覽窗口顯示出來(lái)，你可以通過(guò)點(diǎn)擊旋轉(zhuǎn)和鏡象圖標(biāo)來(lái)調(diào)整對(duì)象的朝向。 5、最后，指向編輯窗口并點(diǎn)擊鼠標(biāo)左鍵放置對(duì)象。對(duì)于不同的對(duì)象，確切的步驟可能略有不同，但你會(huì)發(fā)現(xiàn)和其它的圖形編輯軟件是類(lèi)似的，而且很直觀。 選中對(duì)象(Tagging an Object) 用鼠標(biāo)指向?qū)ο蟛Ⅻc(diǎn)擊右鍵可以選中該對(duì)象。該操作選中對(duì)象并使其高亮顯示，然后可以進(jìn)行編輯。
上傳時(shí)間： 2013-11-09
上傳用戶：2525775
1. 簡(jiǎn)介 ISIS中的屬性有非常大的用處。一個(gè)特定的對(duì)象的屬性是由一些關(guān)鍵字組成，比如，在ISIS中，我們使用封裝的屬性與PCB的封裝關(guān)聯(lián)。 對(duì)象，管腳，電路圖都有自己的屬性，如果你想很把這個(gè)功能強(qiáng)大的軟件用好你必須很清楚他們之間的聯(lián)系，這個(gè)軟件和以前你所用過(guò)的畫(huà)電路的軟件有些不同。 2. 對(duì)象屬性 對(duì)象屬性有兩個(gè)類(lèi)型—系統(tǒng)屬性和使用屬性。在ISIS中的這些功能是由一些保留字所組成，不管是內(nèi)部的程序比如ARES和VSM，或者你自己所使用的軟件都是有關(guān)聯(lián)的。 (1)系統(tǒng)屬性 系統(tǒng)屬性在ISIS中是由一些特殊含義的關(guān)鍵字所夠成。比如，一個(gè)元件中的DEVICE屬性是根據(jù)元件庫(kù)在分配時(shí)候定義的。這些屬性一般是文本的—比如元件的REF和VALUE屬性可以直接從Edit Component對(duì)話框中訪問(wèn)，但是別的比如DEVICE屬性就是做為圖形操作所生成的結(jié)果。
上傳時(shí)間： 2014-03-27
上傳用戶：wangfei22
We intend to develop a wifi enabled p2p file sharing system on a linux platform using jxta and java. The purpose is to build a system that can be ported to an embedded device at a later stage and be used for p2p file sharing using the 802.11b standard. 我們旨在Linux平臺(tái)上使用jxta 和java來(lái)開(kāi)發(fā)一個(gè)支持wifi的p2p文件共享系統(tǒng)。其目的是建造一個(gè)以后可以移植到嵌入式設(shè)備的系統(tǒng)，使用802.11b標(biāo)準(zhǔn)進(jìn)行p2p文件共享。 來(lái)源: http://sourceforge.net/projects/linux-p2p-wifi/
標(biāo)簽： platform develop enabled sharing
上傳時(shí)間： 2015-01-20
上傳用戶：Shaikh
重寫(xiě)了微軟提供SQLHelper(共用的數(shù)據(jù)庫(kù)調(diào)用接口） 1把SqlHelper的connectionString做成一個(gè)全局量，統(tǒng)一設(shè)置數(shù)據(jù)庫(kù)連接字符串 2增加了返回特定表名的DataSet的各接口。 可在項(xiàng)目的config文件設(shè)置數(shù)據(jù)庫(kù)連接字符串 private static string connectionString = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"] <!-- application specific settings --> <appSettings> <add key="ConnectionString" value="packet size=4096 user id=sa data source=localhost persist security info=True initial catalog=NorthWind password= "/> </appSettings> 當(dāng)然可以把數(shù)據(jù)庫(kù)連接方法修改后直接用。
標(biāo)簽： connectionString SQLHelper SqlHelper 微軟
上傳時(shí)間： 2013-12-12
上傳用戶：釣鰲牧馬
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