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《电脑主板EMC设计指南》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、第一章認識電腦主機版之架構範例1Intel440GXAGPsetSystemBlockDiagramPentiumIIPentiumIIVideoorXeonorXeon-DVD-VMI-CameraSlot2Slot2-VideoCapture-VCRSystemBus800MBytes/secHostBusBandwidthGraphics2XAGPBusDevice528MBytes/secDisplayBandwidth82443GX100MHzPCISlotsHostBridge800MBytes/
2、secMainMemoryBandwidth3.3VSDRAMEncoderGraphicsPrimaryPCIBusTVLocalMemory132MBytes/secBandwidthSystemMGMT(SM)BusVideoBIOS2IDEPorts82371EBIO(UltraDMA/33)(PIIX4E)APICISASlots(PCItoISABridge)2USBPortsISABusSystemBIOSTechnologyRoadmap/Confidential12FIRSTINTERNAT
3、IONALCOMPUTER,INC.1998/12/21範例2Intel810ChipsetOverviewGMCH0:notmemorybufferCMCH:withmemorybufferICH:UDMA66+6PCIICH0:UDMA33+4PCISocket370HostBus100/66MHz800MBytes/secHostBusBandwidthDisplayI/FTVOutor800MBytes/secSDRAM100MHzFlatPanelGMCHBandwidthDeviceDigital
4、VideoOutPort421BGAHubInterfaceSMBus2ATA33IDEChannelsICHUSB241BGAPCI33MHz132MBytes/secBusBandwidth2USBPortsLowPinFWHCountLANISA4PCIREQ/GNTPairsInterfaceAC’97Riser2/4MbitAC‘972.1SIOTechnologyRoadmap/Confidential19FIRSTINTERNATIONALCOMPUTER,INC.1998/12/21第二章如何
5、Review線路圖λMotherBoard(1)認識各個重要元件,suchasclockgenerator,CPU,northbridge,southbridge,superI/Ocontroller,audio,video,Lancontrollerchip,VRM,LDCM.(2)蒐集各元件的datasheet,並詳加閱覽.(3)了解其blockdiagram,andarchitecture.λClockGenerator(1)了解各時脈訊號線(clocktrace)的出處腳位(pin),去處,定義及頻率
6、(2)每一條clock是否有預留RCfilter,以利日後方便Tunewaveform.(3)供給的Power是否有CLC丌型濾波.(3)一條clock供給兩個(或以上)device,不可以只給一組RC,必須分別預留,否則會因阻抗匹配問題,難以tunewaveform.(4)確定可SupportSSTfunction.λExternalI/Oport(1)所有Signal必須預留RCfilter.(2)Connector空Pin皆下地.(3)VccPin串L,並de-couplingcap.Power部分(1
7、)選擇LowESR之電容.其它重要Chip(1)Review供給電源是否有加De-coupling電容.Review完所有線路,做一張FrequencyList,標明Frequency,Tracename,O/P,I/P,Chip,及filter值.如下頁所示REQUENCYLISTFORBURTONKevinLin7/20/98FrequencTraceO/PI/PConnectoFilterPS.ynameIC/CHIPIC/CHIPr(MHz)CPUHCLCLKCPU15Ω/5PKGENBXHCLK44
8、0BX18Ω/5P66.8/100DCLKO440BXCKBF47Ω/5PDCLKICKBF440BX15Ω/?DCLK0~1CKBFDIMMx315Ω/5PDCLK0漏1畫4848M_PIXPIIX447Ω/3.9P48M_SIOSUPER33Ω/3.9PI/OBXPCLK440BX47Ω/5P33.4PIXOCLKCLKPIIX433Ω/5PGENPICCLK1~Gold47Ω/5P5Finge
