Computer Hardware User Manual

E‐14HardwareReferenceManual www.picocomputing.com PicoComputing,Inc.
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10
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Tri‐ModeEthernetInterface
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ThePicoE‐14featurestheMarvellAlaskaseries88E1111tri‐modeEthernettransceiver.OnEPseries
partstheMAC(Middleaccesscontroller)isimplementedontheFPGAdie.OnLOseriespartstheMAC
mustbeimplementedinfirmware.CommunicationbetweentheMACandPHYtakesplaceoveran
industry
standardMII/GMIIinterface.
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TheEthernettransceiverfeatures10/100/1000full/halfduplexoperation.Itwillautomatically
configurethephysicalinterfaceontheflyforcrossoverorstraightthroughoperation.ThePHYcan
evenautomaticallycorrectforcommonwiringmistakes.ThePHYhasabuiltinTimeDomain
Reflectometerthatcandiagnosecable
problemsandpinpointtheirdistanceawayfromthe
transceiver.
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IncontrasttothePicoE‐12,theEthernetinterfaceonthePicoE‐14ismagneticallyisolatedallowing
directconnectionstoanindustrystandardhuborswitch.
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TheMarvell88E1111istheonlychiponthePicoE‐14thatrequiresanNDAforaccesstothe
datasheets.Ifyouareinterestedinsomeoftheadvancedfeaturesnotsupportedbythenativedriver,
contactPicoComputingforassistanceinobtaininganNDAfromMarvell.Usersarewarnednotto
contactMarvelldirectly.
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EthernetResources:
Marvell88E1111Webpage http://www.marvell.com/products/transceivers/singleport/88e1111.jsp
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