IP178Cx八口交换机芯片手册

IP178C/IP178CLF/IP178CH/IP178CHLFDatasheet1/94September25,2008Copyright©2004,ICPlusCorp.IP178Cx-DS-R138Port10/100EthernetIntegratedSwitchFeaturesGeneralDescriptionSupport1kMACaddress512kbitspacketbuffermemorySupportauto-polarityfor10MbpsSupportfilter/forwardspecialDAoptionSupportbroadcaststormprotectionAutoMDI-MDIXoptionSupportportsecurityoptiontolockthefirstMACaddressSupportoneMII/RMIIport,whichworksat100MbpsfullduplexforrouterapplicationSupportportbaseVLAN&tagVLANSupportCoSSupportSMARTMACfunctionSupportspanningtreeprotocolSupportmaxforwardingpacketlength1552/1536bytesoptionSupport8-levelbandwidthcontrolSupportSCASupporttwofiberportswithfarendfaultfunctionforIP178CHonlyBuiltinlinearregulatorcontrolcircuitSupportLeadFreepackage(PleaserefertotheOrderInformation)Note–somefeaturesneedCPUsupport,pleaserefertothedetaildescriptioninsidethisdatasheetIP178C/IP178CHintegratesa9-portswitchcontroller,SSRAM,and810/100Ethernettransceivers.EachofthetransceiverscomplieswiththeIEEE802.3,IEEE802.3u,andIEEE802.3xspecifications.ThetransceiversaredesignedinDSPapproachin0.18umtechnology;theyhavehighnoiseimmunityandrobustperformance.IP178C/IP178CHoperatesinstoreandforwardmode.Itsupportsflowcontrol,autoMDI/MDI-X,CoS,portbaseVLAN,bandwidthcontrol,DiffServ,SMARTMACandLEDfunctions,etc.Eachportcanbeconfiguredasauto-negotiationorforced10Mbps/100Mbps,full/halfduplexmode.UsinganEEPROMorpullup/downresistorsonspecificpinscanconfigurethedesiredoptions.Besidesan8-portswitchapplication,IP178C/IP178CHsupportsoneMII/RMIIportsforrouterapplication,whichsupports7LANportsandoneWANport.TheexternalMACcanmonitororconfigureIP178C/IP178CHbyaccessingMIIregistersthroughSMI.MII/RMIIportalsocanbeconfiguredtobeMACmode.ItisusedtointerfaceanexternalPHYtoworkasan8+1switch.IP178CHsupportstwofiberportswithfarendfaultfunction.IP178C/IP178CLF/IP178CH/IP178CHLFDatasheet2/94September25,2008Copyright©2004,ICPlusCorp.IP178Cx-DS-R13TableOfContentsFeatures...................................................................................................................................................1GeneralDescription..................................................................................................................................1TableOfContents.....................................................................................................................................2RevisionHistory........................................................................................................................................3Pindiagram(IP178C).............................................................................................................................101Pindescription.................................................................................................................................15Pindescription(continued).....................................................................................................................16Pindescription(continued).....................................................................................................................18Pindescription(continued).....................................................................................................................19Pindescription(continued).....................................................................................................................20Pindescription(continued).....................................................................................................................21Pindescription(continued).....................................................................................................................22Pindescription(continued).....................................................................................................................24Pindescription(continued).....................................................................................................................25Pindescription(continued).....................................................................................................................26Pindescription(continued).....................................................................................................................27Pindescription(continued).....................................................................................................................282FunctionalDescription.....................................................................................................................292.1Flowcontrol.........................................................................................................................322.2Broadcaststormprotection.................................................................................................332.3Portlocking.........................................................................................................................342.4PortbaseVLAN.............................................