




已閱讀5頁(yè),還剩3頁(yè)未讀, 繼續(xù)免費(fèi)閱讀
版權(quán)說(shuō)明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)
文檔簡(jiǎn)介
1TheworkprincipleoftheMemory1.ThestructureoftheMemoryTheMemoryisusedtodepositthedata.Itistomakeuseofhighandlowevenelectricitytodepositthedata,andthatistosay,itsdepositingdataisanelectricityevenandhighandlow,notthe1234suchasarithmeticfigure,then,ourriddleundone.Socomputerisnotmysterioustoo.AMemorylookslikesomesmalldrawers,thereareeightsmallblanksinasmalldrawer,everysmallblankisusedtodeposittheelectriccharge,theelectricchargespreadstocomeinorreleasepassingtheelectricwirethatconnectwitheachother,astotheelectricchargehowtoplaceinthesmallblank,weneednotworried.Youcanthinktheelectricwireaswaterpipe.Theelectricchargeintheblankiswater.Thatiseasytocomprehend.Thesmalldrawerinsavingeachoneinthemachineisaplacethatputsthedata,wecallitasaUnit.Wecanstartdepositingthedata.Ifyouwanttoputintoafigure12,thatis00001100,weaslongassaveNo.2andNo.3smallblankinfullelectriccharge,butothersmallelectricchargeintheblanktorelease.Buttheproblemcomesout,Memorycontainalotofunits,thelineistoparallel.Whenyouputtheelectricintoablank,youwillputtheelectricchargeintoallunits,andwhenyoureleasetheelectriccharge,youwillputallelectricchargeineveryunit.SohowmanyunitstheMemoryhave,youcanputthesamepiece,thisofcourseisnotwhatwehope,therefore,weneedmakesomevarietiesontheconstructionslightly.Everyunithasacontrolline,Iwanttoputthedataintowhichunit,thecontrollinethatgiveasignalinthisunit.Thiscontrollineopentheswitch,likethis,electricchargecanthenfluxfree,andtheotherunitcontrollineshavenothesignal,sotheswitchdonotopen,cantsufferfromtheinfluence,likethis,thecontrollinethatonlycontrolthedifferentunit,canwriteintoeachunitthedifferentdata.Thesameas,ifwanttotakethedatainacertainunit,andalsoaslongasopenthehomogeneouscontroltheswitchline.2.TheMemorytranslatesthecodeHowwecometocontroltheeveryunitcontrollingline?Acontrolforreturningremarkably,eachunitdollarlineleadstheoutsideoftheintegratedcircuitnotline?Affaircandontbesosimple,one27512have65536unitsinMemory,haveeachlinethederivationto,thisintegratedcircuitmustmorethan60,000feet?Notline,howdo?2Wantingtheviewpointreducesthelinearquantity.Wehaveakindofmethodtocallthisastotranslatethecode,thesimpleintroductionisonce:Canalinerepresent2kindsofappearances,can2linesrepresent4kindsofappearances,can3linesrepresenthowmanykinds,256kindsofappearancesneedagainhowmanylinesrepresent?8kinds?8lines?Soweneed16linestorepresent65536kindsofappearances.3.TheMemorysenablechipandtheconceptofthebusTothis,translatetheproblemofthecoderesolved,letuscomeagaintopayattentiontoanotherproblem.Sendingintoeightlinesofeachunitistousefromwhereof?Itisfromthecalculationonboardtoconnecttocomeover,generally,theseeightlinesbesidesconnectingtheMemory,stillconnectothermachinepiece,Likethisproblemcomeout,theseeightlinesisnotaMemoryandacomputerappropriatly,ifalwaysacertainunitconnectinghereeighton-line,notwell,forexamplethissavingmachinenumberintheunitisfirst0FFH,anothersavingmachineis00H,sothislineafterallistobeplacedinthehighelectricityeven,stilllowelectricityeven?Whowillbeharmful?Sowewanttoletthemseparate.Thewayiseasycertainly,thelinethatbetheoutsidereceivestheintegratedcircuitleadsthefeetaftercomingin,dontreceivedirectlyeachunitgoto,addingonemoresetofswitchinthecenterline.Usuallywestepasidethepassopens,iffacesreallythisissavingtowriteinthedatainthemachine,orwanttoreadadatafromtheMemory,thenstepasidethepassconnecttheline.Thisswitchfromthreefuseschoice:Readingthecontrolcarry,writesthecontrolcarriestochoosetocarrywiththeslice.Wanttowriteinthedataintoasliceofinside,pickoutfirstthatchip,thensendouttowritealetterthenumber,switchmatchthetop,combiningwillspreadtocomeoverofthedata(electriccharge)writesinaninside.Ifread,pickoutfirstthatsliceof,thensendouttoreadtheletterthenumber,theswitchmatchesthetop,datawassentouttogoto.Readdifferentfromwritingaletterthenumbertostillconnecttotheanothertosavethemachineatthesametime,butbecausetheslicechoosesdifferently,althoughreadorwritealetterthenumber,havenothechipenablesignal,soanotherMemorycantmisunderstandopenthedoor,resultintheclash.Sowouldthedifferenthourpickouttwochips?Aslongasistodesignthesystemcant,donotisourpersontocontrolbutbecontrolledbycomputer,ifreallytheemergenceappearstopickouttwochipscircumstancesatthesametime,thatistherowthatelectriccircuitbreakdown,thisisnot3inourdiscussion.Fromtheintroductionabovewehaveseen,theeightlinesusedtodeliverthedataandarenotspecial-used,butalotofcomponentsarepublic-used.Sowecallitasthedatatotalline,bynameBUSinEnglishintotalline,totalnamelybusway。Whocanwalk.And16addresseslineistobeconnectedtogether,callitastheaddresstotalline.4.Thesemi-conductorMemorysclassificationAccordingtoitsfunction,theMemorycanbedividedintoreadandreadrandomMemorytwomajortype.So-calledacontentsforreading,fromthetypefacecomprehensioniscanonlywithfrominsidereading,cantwritinginto,itsimilarlyinourbook,hairarrivingourreturningafter,ourcanreadinginside,mustnotchangethecontentsonthebookasonespleases.AnEnglishforreadingsavingmachineabbreviationisROM(READONLYMEMORY).Memoryso-calledrandomaccess,canrewriteatanytimenamely,thedatathatalsocanreadtheinside,itissimilarinourblackboard,Icanwriteatanytimethethinggoesup,alsocanwipetorewritewiththeblackboard.SavingtheEnglishabbreviationofthemachineaswiththemachineRAM(READRANDOMMEMORY)thesetwokindsofsavingmachinesEnglishabbreviationmustkeepinmind.Attention:theso-calledreadtopointwithrandomaccessallthetimeofnormalworkcircumstancedescendingandspeech,andalsoisatusingthethispieceofsavingthemachine,nottimetopointtomakethispieceofchip.Otherwise,readthesavingdatainthemachinetohowcomeof?Infact,thistruthisveryeasytocomprehend,thebookgetsholdofourhandistocantchange,canbeitstillwhitepaperinininoriginalmaterialoftime,wasprintedbyprintingpressupcertainly.5.ExplaintheotherafewandfamiliarconceptsbythewayPROM,callitastheprogrammableROM.Thisislikeourexercisebook,buyofthetimeisblank,canwritethethinggoup,canoncewriteup,wipedtodonotdrop,soitcanusetowriteonce,ifwritemistake,submitanexpenseaccount.EPROM,callitasthattheultravioletraywipestheprogrammablethatdividedbyreadsthesavingmachine.Itinsideofaftercontentswritegoup,iffeeldissatisfied,canrewriteafterthrowingawaywithakindofspecialmethod,thisistousestheultravioletrayirradiation,ultravioletrayelephantthewordofworksproperly,canthrowawaytheword,thenrewrite.Certainlythenumberoftimesaremany,andalsoineffectivelight,so4anumberoftimesforcanwipedividedbyisalsoalimitedseveral100times.FLASHROM,callitasthethingthatsavethemachinesoon,itissimilarwiththeEPROM,writingupcanalsowipeofftorewrite,butitwanttheconveniencethesome,donotneedthelightshoneon,aslongasusethescienceofelectricitymethodandthencanwipetodividedby,sotheconvenienceismany,andthelifeistooverylong.(Severaltenthousandarriveseveraldonotwait100,000times)Emphasizeagain,thethingsherewriteareallnotatthenormalworkterm.WhetheritisaPROM,EPROMorFLASHROM,theirwritingallhasspeciallimits.Generally,weuseakindofcalledasprogrammablecontrollertodothiswork.Oncepackedtotheworkposition,youwontrewriteliterally.6.Inaddition,todescribetheSingle-chipmicrocomputer8051sconfiguration8051filmshaveROM(Procedurememory,onlytime)andRam(datamemory,couldwritereadable)categories,whichareseparatememoryaddressspace,andgeneralcomputermemoryallocationmethodisthesame.Usuallyonlyonegeneralcomputeraddressspace,ROMandRamthatcanbearbitrarilyplacedinthecontextofadifferentaddressspace,ROMandRamaddressesinaleaguewithdifferentaddressesinthedistributionspace.CPUvisitstheROM,acorrespondenceaddressonlyMemorymodulecanbeROM,andcanalsobeRam,andasimilarvisitdirective.8051intheMemorystructureisdividedintophysicalprocessesmemoryspacean
溫馨提示
- 1. 本站所有資源如無(wú)特殊說(shuō)明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
- 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
- 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽,若沒(méi)有圖紙預(yù)覽就沒(méi)有圖紙。
- 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
- 5. 人人文庫(kù)網(wǎng)僅提供信息存儲(chǔ)空間,僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
- 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請(qǐng)與我們聯(lián)系,我們立即糾正。
- 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。
最新文檔
- 2025年云計(jì)算服務(wù)模式創(chuàng)新案例分析報(bào)告:市場(chǎng)競(jìng)爭(zhēng)格局與機(jī)遇
- 2025年醫(yī)院信息化建設(shè)醫(yī)院物資管理系統(tǒng)初步設(shè)計(jì)評(píng)估報(bào)告
- 九大文化娛樂(lè)產(chǎn)業(yè)人才培養(yǎng)與職業(yè)發(fā)展規(guī)劃研究報(bào)告
- 特色小鎮(zhèn)產(chǎn)業(yè)培育資金申請(qǐng)政策導(dǎo)向與產(chǎn)業(yè)集聚效應(yīng)報(bào)告
- 2025年房地產(chǎn)行業(yè)房地產(chǎn)企業(yè)數(shù)字化轉(zhuǎn)型戰(zhàn)略研究報(bào)告
- 2025新能源汽車制造產(chǎn)業(yè)布局下的汽車產(chǎn)業(yè)鏈整合報(bào)告
- 2025年數(shù)字貨幣對(duì)金融行業(yè)數(shù)字貨幣金融監(jiān)管的監(jiān)管政策與監(jiān)管實(shí)踐分析報(bào)告
- 2025年醫(yī)藥流通供應(yīng)鏈優(yōu)化與成本控制技術(shù)創(chuàng)新趨勢(shì)報(bào)告
- 2025年K2教育STEM課程實(shí)施與教育信息化融合研究報(bào)告
- 2025年廣播媒體融合發(fā)展中的跨界合作與生態(tài)構(gòu)建報(bào)告
- 近岸海域生態(tài)環(huán)境問(wèn)題分析
- 2025重慶水務(wù)環(huán)境集團(tuán)招聘8人筆試參考題庫(kù)附帶答案詳解
- 2025至2030中國(guó)大型啤酒廠產(chǎn)業(yè)運(yùn)行態(tài)勢(shì)與競(jìng)爭(zhēng)格局研究報(bào)告
- 陜投(贛州)信豐能源發(fā)展集團(tuán)有限公司招聘筆試題庫(kù)2025
- 頸部淋巴結(jié)清掃術(shù)后護(hù)理
- 河南大學(xué)語(yǔ)文試題及答案
- 雷達(dá)原理與系統(tǒng)教學(xué)省公開課一等獎(jiǎng)全國(guó)示范課微課金獎(jiǎng)?wù)n件
- 毛石混凝土換填施工方案
- 2025-2026年摩托車制造電動(dòng)化發(fā)展趨勢(shì)
- eDNA技術(shù)監(jiān)測(cè)陸地生物多樣性:技術(shù)要點(diǎn)、難點(diǎn)與進(jìn)展
- 海外項(xiàng)目廉潔風(fēng)險(xiǎn)的防控
評(píng)論
0/150
提交評(píng)論