【正文】 t latency response, ability to service the high number of time and event driven integrated peripherals needed in real time applications, and a CPU with above average processing power in a single package. The financial and legal risk of having devices that operate unpredictably is very high. Once in the market, particularly in mission criticalapplications such as an autopilot or antilock braking system, mistakes are financiallyprohibitive. Redesign costs can run as high as a $500K, much more if the fix means 2 back annotating it across a product family that share the same core and/or peripheral design flaw. In addition, field replacements of ponents is extremely expensive, as the devices are typically sealed in modules with a total value several times that of the ponent. To mitigate these problems, it is essential that prehensive testing of the controllers be carried out at both the ponent level and system level under worst case environmental and voltage plete and thorough validation necessitates not only a welldefined process but also a proper environment and tools to facilitate and execute the mission Chandler Platform Engineering group provides post silicon system validation (SV) of various microcontrollers and processors. The system validation process can be broken into three major type of the device and its application requirements determine which types of testing are performed on the device. The AT89C51 provides the following standard features: 4Kbytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16bittimer/counters, a five vector twolevel interrupt architecture,a full duple ser ial port, onchip oscillator and clock addition, the AT89C51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters,serial port and interrupt sys tem to continue functioning. The Powerdown Mode saves the RAM contents but freezes the oscil –lator disabling all other chip functions until the next hardware reset.附錄Ⅲ中文翻譯單片機(jī)廣泛應(yīng)用于商業(yè)：諸如調(diào)制解調(diào)器，電動(dòng)機(jī)控制系統(tǒng)，空調(diào)控制系統(tǒng)，汽車(chē)發(fā)動(dòng)機(jī)和其他一些領(lǐng)域。Intel 平臺(tái)工程部門(mén)開(kāi)發(fā)了一種面向?qū)ο蟮挠糜隍?yàn)證它的AT89C51 汽車(chē)單片機(jī)多線(xiàn)性測(cè)試環(huán)境。8位AT89C51 CHMOS 工藝單片機(jī)被設(shè)計(jì)用于處理高速計(jì)算和快速輸入/輸出。AT89C51 尤其很好適用于得益于它的處理速度和增強(qiáng)型片上外圍功能集，諸如：汽車(chē)動(dòng)力控制，車(chē)輛動(dòng)態(tài)懸掛，反鎖制動(dòng)和穩(wěn)定性控制應(yīng)用。重新設(shè)計(jì)的費(fèi)用可以高達(dá)500K 美元，如果產(chǎn)品族享有同樣內(nèi)核或外圍設(shè)計(jì)缺陷的話(huà)，費(fèi)用會(huì)更高。這種系統(tǒng)的驗(yàn)證處理可以被分解為三個(gè)主要部分?？臻e方式體制CPU 的工作，但允許RAM，定時(shí)/計(jì)數(shù)器，串行通信口及中斷系統(tǒng)繼續(xù)工作。 要求：（1）、用鍵盤(pán)做出電子琴按鍵，每鍵代表一個(gè)音符；（2）、各音符按一定順序排列，符合電子琴的按鍵排列順序；（3）、可以彈奏出簡(jiǎn)單的樂(lè)曲；（4）、附加功能如自動(dòng)演奏簡(jiǎn)單節(jié)奏、樂(lè)曲。 2013年5月12日~2013年5月23日：做出系統(tǒng)設(shè)計(jì)方案，形成畢業(yè)設(shè)計(jì)論文的初稿，畢業(yè)設(shè)計(jì)中期檢查。 you don39。tFurther help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as aa damagesbased agreement, you should make sure you39。Employment tribunals.The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s about how he felt and I would like to speak to him first to find out what his experience was.Uefa hass 21 win.Michel Platini, president of European football39。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it.　　一字開(kāi)頭的年齡已經(jīng)到了尾聲。The end of our life, and can meet many things really do?　　而窮盡我們的一生，又能遇到多少事情是真正地非做不可？During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional?？傆X(jué)得自己自己似乎應(yīng)該去做點(diǎn)什么，或者寫(xiě)點(diǎn)什么。s actions.CSKA said they were surprised and disappointed by Toure39。for the racist behaviour of their fans durings 150th anniversary celebrations and will attend City39。To find your nearest CAB, including those that give advice by , click ont charge you more than 35% of your pensation against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed under your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, see2013年6月16日~2013年6月22日：對(duì)論文進(jìn)行細(xì)節(jié)修改，最終定稿并打印，等待答辯。進(jìn)度及完成日期2013年4月08日~2013年4月25日：搜索論文資料及查閱參考文獻(xiàn)，合理分析需求，學(xué)習(xí)單片機(jī)設(shè)計(jì)技術(shù)。畢業(yè)設(shè)計(jì)任務(wù)書(shū)專(zhuān)業(yè) 機(jī)械設(shè)計(jì)制造及其自動(dòng)化 班級(jí) 姓名 下發(fā)日期 20130301 題目基于單片機(jī)的電子琴系統(tǒng)設(shè)計(jì)專(zhuān)題單片機(jī)系統(tǒng)設(shè)計(jì)主要內(nèi)容及要求 內(nèi)容：使用51系列單片機(jī)作為核心控制器完成簡(jiǎn)單電子琴的制作。AT89C51提供以下標(biāo)準(zhǔn)功能：4k字節(jié)FLASH閃速存儲(chǔ)器，128 字節(jié)內(nèi)部RAM，32 個(gè)I/O 口線(xiàn)，2 個(gè)16 位定時(shí)/計(jì)數(shù)器，一個(gè)5 向量?jī)杉?jí)中斷結(jié)構(gòu)，一個(gè)全雙工串行通信口，片內(nèi)振蕩器及時(shí)鐘電路。為了緩和這些問(wèn)題，在最壞的環(huán)境和電壓條件下對(duì)這些單片機(jī)進(jìn)行無(wú)論在部件級(jí)別還是系統(tǒng)級(jí)別上的綜合測(cè)試是必需的。擁有操作不可預(yù)測(cè)的設(shè)備的經(jīng)濟(jì)和法律風(fēng)險(xiǎn)是很高的。商業(yè)應(yīng)用包括調(diào)制解調(diào)器，電動(dòng)機(jī)控制系統(tǒng)，打印機(jī)，影印機(jī)，空調(diào)控制系統(tǒng)，磁盤(pán)驅(qū)動(dòng)器和醫(yī)療設(shè)備。開(kāi)發(fā)的這種環(huán)境連接了AT89C51。然而，這些關(guān)鍵應(yīng)用領(lǐng)域也要求這些單片機(jī)高度可靠。Oxf0) !=Oxf0) //若有鍵按下{ delay( )； //延時(shí)去抖動(dòng)if ((P0amp。Oxf0)|Ox0f。while(ms——) for (t=0；t120；t++)；}/*鍵消抖延時(shí)函數(shù)*/void delay(void){uchar i；for (i=300；i0；i——)；}/*鍵掃描函數(shù)*/uchar getkey(void){uchar scancode，tmpcode；if ((P0amp。身邊的同學(xué)和朋友，有你們，我的大學(xué)才算完整。第三，感謝我的父母親，你們是我力量的源泉，只要有你們，不管面對(duì)什么 樣的困難，我都不會(huì)害怕，謝謝你們對(duì)我的支持與鼓勵(lì)！再次，感謝我的室友及其他好友，因?yàn)橛心銈兊膸椭?，我的論文得以順利?成。從開(kāi)始選題到中期修正，再到最終定稿，老師給我提供了許多寶貴建議。還可以做得更加娛樂(lè)一點(diǎn)，增加一些彩 燈使彩燈隨著音調(diào)變化而產(chǎn)生不同的樣式。這個(gè)設(shè)計(jì)題目并不是新的，但從中能體現(xiàn)到一個(gè)系統(tǒng)開(kāi)發(fā)設(shè)計(jì)的過(guò)程，足于讓我們受益。本課題通過(guò)制作電子琴，將幾個(gè)模塊很好的融合起來(lái)，對(duì)使用單片機(jī)設(shè)計(jì)簡(jiǎn)易電子琴進(jìn)行了分析，并介紹了基于單片機(jī)電子琴統(tǒng)硬件組成。 利用keil與Proteus進(jìn)行的調(diào)試用步驟：1. 打開(kāi)keil,建立工程，輸入程序。機(jī)器匯編是通過(guò)匯編軟件將源程序變?yōu)闄C(jī)器 碼，用于MCS51單片機(jī)的匯編軟件有早期的A51，隨著單片機(jī)開(kāi)發(fā)技術(shù)的不斷發(fā)展，從普遍使用匯編語(yǔ)言到逐漸使用高級(jí)語(yǔ)言開(kāi)發(fā)，單片機(jī)的開(kāi)發(fā)軟件也在不斷發(fā)展，Keil軟件是目前最流行開(kāi)發(fā)MCS51系列單片機(jī)的軟件，這從近年來(lái)各仿真機(jī)廠商