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《CHAPTER 4 The Components of the System Unit1. The System Unit 課件》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、CHAPTER4TheComponentsoftheSystemUnittheSystemUnit2SystemUnitTypes（系統(tǒng)單元類型）SystemUnitHouseselectroniccomponentsBasiccomponentsSystemboardMicroprocessorMemoryExpansioncardsExpansionslotsTypesofSystemUnitsDesktopNotebookTabletPCPersonalDigitalAssistant3DesktopUnits（臺式機(jī)）Non-portable非移動(dòng)式Input/Outpu
2、tdeviceslocatedoutsidethesystemcabinet輸入輸出設(shè)備位于系統(tǒng)箱外4NotebookUnit（筆記本）PortableMonitorattachedbyhinges顯示器可開合Keyboardandpointingdevicesintegraltothesystemunit鍵盤和指示設(shè)備集成于系統(tǒng)單元5TabletPCsystemunit（平板電腦）Similartonotebook與筆記本相似Highlyportable高移動(dòng)性Supporttheuseofastylusorpen支持記錄筆6PDAUnits（掌上電腦）Smallestsyst
3、emunitAllinput/outputandsecondarystoragedevicesintegraltothesystemunit7ElectronicData&Instructions （電子數(shù)據(jù)和指令）BinarySystem0sand1sEach0or1isabit8bits=1byte8BinaryCodingScheme（二進(jìn)制編碼方案）AmericanStandardCodeforInformationInterchange(ASCII)ExtendedBinaryCodedDecimalInterchangeCode(EBCDIC)Unicode9ASCI
4、I（美國信息交換標(biāo)準(zhǔn)碼）Widelyusedinmicrocomputers1byte=1characterExamplesLetterRisrepresentedby01010010Number3isrepresentedby00110011Character%isrepresentedby0010010110EBCDIC（擴(kuò)充二進(jìn)制編碼的十進(jìn)制交換碼）DevelopedbyIBMUsedinmainframecomputers1byte=1characterExamplesLetterRisrepresentedby11011001Number3isrepresentedby
5、11110011Character%isrepresentedby0110110011Unicode（統(tǒng)一字符編碼標(biāo)準(zhǔn)）DevelopedbyUnicode,Inc.withsupportfromApple,IBM,andMicrosoftUsedtosupportinternationallanguagessuchasJapaneseandChinese2bytes=1character12SystemBoard（系統(tǒng)板）Connectsallcomponents連接所有部件Datapathbetweendevices設(shè)備間的數(shù)據(jù)通道Alsocalledthemainboard
6、ormotherboard也叫主板13SystemBoardComponents（組成）Sockets插孔Connectionpointsforsmallspecializedelectronicparts小電子部件的連接點(diǎn)Chips芯片Tinycircuitboardsetchedintosiliconwafer蝕刻成電路板后的硅晶片CarrierPackage芯片封裝后的集成電路塊Slotconnectionpointforspecializedcardsorcircuitboards14Microprocessor（微處理器）The“brains”ofthecomputer
7、systemLocationoftheCentralProcessingUnit(CPU)Chipcapacityexpressedinwordsize16bit,32bit,64bitLargerthewordsize fasterthecomputer15CPU（中央處理器）ControlunitDirectsthemovementofelectronicsignalsbetweenmemoryandtheALUArithmetic-logicunit(ALU)Arithme
