Spartan-3an User Manual Brandname: Xilinx Category: Controller Total Pages: 140 Table of contents RevisionHistory2TableOfContents3AboutThisGuide9Acknowledgments10AdditionalResources11IntroductionAndOverview13DesignTrade-Offs21RelatedResources24SlideSwitches25SuspendSwitch26Push-ButtonSwitches27RotaryPush-ButtonSwitch28DiscreteLeds30OptionalDiscreteLeds31ClockSources33ClockConnections34RelatedResources35FpgaConfigurationOptions37ConfigurationModeJumpers39ProgPush-ButtonSwitch40DonePinLed41CharacterLcdScreen43VoltageCompatibility44LcdController45Operation52RelatedResources55VgaDisplayPort57VgaSignalTiming60UcfLocationConstraints61Rs-232SerialPorts63UcfLocationConstraints64Ps2MousekeyboardPort65Keyboard66Mouse68VoltageSupply69UcfLocationConstraints70AnalogCaptureCircuit71ProgrammablePre-Amplifier73ConnectingAnalogInputs77