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E‐14HardwareReferenceManual www.picocomputing.com PicoComputing,Inc.
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CardBusInterface
ThePicoE‐14canrunasastandaloneproductorbeconnectedtoahostusingtheCardBusconnector.
Bydefault,thePicoE‐14shipswithfirmwarethatisreadyforuseasaCardBusslavedevice,butitalso
supportsbusmastering.Thatsamefirmwarealsoprovidesthemeanstoswitchintostandlonemode.
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CardBusisa32‐bitinterfacewithamaximumspeedof33MHz.ThePicoE‐14hardwareisdesignedto
supportstandardPCMCIAaswellasDMAmode.TheCardBusstandardspecifiesthatallCardBushosts
bebackwardcompatiblewithPCMCIA.
SinceCardBussystemscanonlybe3.3V,no
digitaltranslatingtransceiversarerequiredtoconnectwith
ahost.ThisallowsdirectconnectiontotheVirtex‐4FPGAforreducedpowerconsumption.Withthis
design,itiseasilypossibletoreversetheCardBusinterfaceandusethePicoE‐14asahostcontroller
forotherCardBusandPCMCIA
cards.
ThosewhoareinterestedinalternateinterfacesshouldcontactPicoComputing.ThePCMCIAdecoder
sourcecodeandsupportisavailable.
PCMCIAInterfaceResources:
CompactFlashAssociation www.compactflash.org
PCMCIAWebsite www.pcmcia.org
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For more information on standlone, reference the Standalone documentation located in the doc directory of where Pico
Utility is installed.