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Pico Communications E-14 Computer Hardware User Manual

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E‐14HardwareReferenceManual www.picocomputing.com PicoComputing,Inc.

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DigitalBusInterface

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WhenthePicoE‐14isnotconnectedtoaCardBushost,thedigitalbuscanbereconfiguredtoconnect

withawidevarietyofhigh‐speeddigitalbussesandperipherals.Allsignalshaveuserselectablepull‐

up,pull‐down,keeperorHI‐Ztermination.Drivestrengthisalsouserselectablebetween2and24mA.

Allpinscanbeconfiguredforinput,outputandbi‐directionalmode.

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Withpropertermination,speedsofover200MHzarepossible.Theexternaldigitalbusissetto

transmitandreceiveat3.3Vonly.

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ElectricalSpecifications(DC) Minimum Nominal Maximum

PositiveSupplyInputVoltage(Vcc) 3.15V 3.3V 5.5V

LowLevelInputVoltage 0V 0V 0.7V

HighLevelInputVoltage 2V 3.0V 3.3V

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DriveStrength 2mA 24mA

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