BCM56620Rudy.Sun2008-08-231Outline„1.Deviceoverview„2.Systeminterface„3.Powersupplyandpowerconsumption„4.Clock„5.Layout21.Deviceoverview„1.1Features„1.2Rangeofapplications„1.3Functionalblockdiagram„1.4HiGigstackingports„1.5Stackingmode:stand-alone„1.6Stackingmode:linkcard31.1Features„24GbEportsarecapableofoperatingat10/100/1000Mbps.„410-GbE/HiGig2uplinkports(connecttootherstrataXGSdevices)„L3switchingfeatures„IPv6routingandtransition41.2Rangeofapplications„Enterpriseaggregation„Enterprisecorechassis„Enterpriseroutingswitch„Metroedge„WANaccess„WANedge51.3Functionalblockdiagram61.4HiGigstackingports„HiGig2mode:5Gbps*4/1.25=16Gbps„HiGig+mode:3.75Gbps*4/1.25=12Gbps„Whyweneeddivide1.25?„8/10*4*5Gbps/s=16G71.5Stackingmode:stand-alone81.6Stackingmode:linkcard92.Systeminterface„GbEdownlinkports(SGMII/SerDes10/100/1000BASE-Tand1000BASE-X)„HiGig2/XAUIFour10/12/13/16-Gbpsuplinkports„PCI2.2(32bitrunningat66MHz)„MIIM(communicationwithexternalphydevices)„JTAG(boundaryscanoperation)„BSC(asacorrespondingchannelbetweenMACandCPU)„LED(directaccesstoper-portspeed,duplexstate,flowcontrolstate,linkstate,transmitandreceivestate.)„RESET102.1Higig2/XAUIinterface„Four10/12/13/16-Gbpsuplinkports,full-duplexoperation„IntegratedSerDes,IEEE802.3ae-compliantXAUIinterface„Eachportcanbeindividuallyselectedforeither10-GbE802.3aeEthernet,12-GbpsHiGig+,or16-GbpsHiGig2112.210Gport-XAUI„Supportbothfiberopticandcoppermedium„CanbeconnectedtoXFP/XENPAKopticalmodules(support40metres)„Support10GBASE-CX4(supportC-wiretransmit10Gdata,support15metres)basedondualtwin-axialinfinibandcable.„3.125Gbps*4/1.25=10Gbps„(3.125Gbps8B/10BencodedspeedSerDesinterface)„Eachportcanbeconfiguredtooperatein2.5Gor1Gmode.122.2.1XAUIinterface-XFP132.2.2XAUIinterface-XENPAK142.2.4XAUI-XAUIinterface152.2.5XAUI:1/2.5Guplinkport16XAUIbasedportcansupport1GEand2.5GEoperation.HiGig2arenotsuppo