USB 布线(中文版)

USB•零••Clock•XTL,OSC•D+/D-USBhostcontroller(IC)零度ClockD+/D-,Clock/,D+/D-PCBConnector量離(例I/Oconnector,,)D+/D-90,2451arc,D+/D-,Clock,IC不XTLOSCD+/D-路Stub量,,,不200mil.(SWITCHICPI3USB10D+/D-VCCorGNDPlanes,不,VCCorGNDPlanes路輻D+/D-USB離,狀流,濾•20,Trace離VCCGNDPlanes離20度(例度4.5milTrace離Planes90mil,,PCB輻HighSpeedUSBTermination*IC,離HSOutput200mil*DownstreamPorts15K拉USB連PIN.(拉IC裡)HighSpeedUSBTraceSpacing•D+/D-行,離90•度90•D+/D-Clock,行度,,EMIClock離50mil•料,USB20mil,D+/D-,不不200mil(5.08mm)不,路度,USB,ClockTracePlaneSplit25milUSB.(例USBTraceAGND,若不,D+/D-AGND不25mil)流(MP1527),離PCBConnector,流流度PCBTraceXTLOSCPCB,XTLOSCGNDFootprint更,ViaGND,輻END•Clock,XTLOSC離USBIC,USBTrace,I/Oport,PCB,Pinheader,Jack,(VCCGND).USBTracePCB輻量