TMS320VC5509DSPADCReferenceGuidespru586b精.docx

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TMS320VC5509DSPADCReferenceGuidespru586b精

TMS320VC5507/5509DSPAnalog-to-DigitalConverter（ADC）ReferenceGuide

LiteratureNumber:

SPRU586B

June2004

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Copyright2004,TexasInstrumentsI

PrefaceReadThisFirst

AboutThisManual

Thismanualdescribesthefeaturesandoperationoftheanalog-to-digitalcon-verterthatisontheTMS320VC5507andTMS320VC5509digitalsignalproc-essors（DSPs）intheTMS320C55x（C55x）DSPgeneration.

NotationalConventions

Thisdocumentusesthefollowingconventions:

-Inmostcases,hexadecimalnumbersareshownwiththesuffixh.For

example,thefollowingnumberisahexadecimal40（decimal64）:

40h

-Binarynumbersoftenareshownwiththesuffixb.Forexample,the

followingnumberisthedecimalnumber4showninbinaryform:

0100b

RelatedDocumentationFromTexasInstruments

ThefollowingdocumentsdescribetheC55xdevicesandrelatedsupporttools.CopiesofthesedocumentsareavailableontheInternetat.Tip:

Entertheliteraturenumberinthesearchboxprovidedat.TMS320VC5507Fixed-PointDigitalSignalProcessorDataManual（litera-

turenumberSPRS244）describesthefeaturesoftheTMS320VC5507fixed-pointDSPandprovidessignaldescriptions,pinouts,electricalspecifications,andtimingsforthedevice.

TMS320VC5509Fixed-PointDigitalSignalProcessorDataManual（litera-

turenumberSPRS163）describesthefeaturesoftheTMS320VC5509fixed-pointDSPandprovidessignaldescriptions,pinouts,electricalspecifications,andtimingsforthedevice.

TMS320VC5509AFixed-PointDigitalSignalProcessorDataManual（liter-

aturenumberSPRS205）describesthefeaturesoftheTMS320VC5509Afixed-pointDSPandprovidessignaldescriptions,pinouts,electricalspecifications,andtimingsforthedevice.

SPRU586BAnalog-to-DigitalConverter（ADC）3

RelatedDocumentationFromTexasInstrumentsRelatedDocumentationFromTexasInstruments/Trademarks

TMS320C55xTechnicalOverview（literaturenumberSPRU393）introduces

theTMS320C55xDSPs,thelatestgenerationoffixed-pointDSPsintheTMS320C5000DSPplatform.Likethepreviousgenerations,thisproc-essorisoptimizedforhighperformanceandlow-poweroperation.ThisbookdescribestheCPUarchitecture,low-powerenhancements,andembeddedemulationfeatures.

TMS320C55xDSPCPUReferenceGuide（literaturenumberSPRU371）

describesthearchitecture,registers,andoperationoftheCPUfortheTMS320C55xDSPs.

TMS320C55xDSPPeripheralsOverviewReferenceGuide（literature

numberSPRU317）introducestheperipherals,interfaces,andrelatedhardwarethatareavailableonTMS320C55xDSPs.

TMS320C55xDSPAlgebraicInstructionSetReferenceGuide（literature

numberSPRU375）describestheTMS320C55xDSPalgebraicinstruc-tionsindividually.Alsoincludesasummaryoftheinstructionset,alistoftheinstructionopcodes,andacross-referencetothemnemonicinstruc-tionset.

TMS320C55xDSPMnemonicInstructionSetReferenceGuide（literature

numberSPRU374）describestheTMS320C55xDSPmnemonicinstruc-tionsindividually.Alsoincludesasummaryoftheinstructionset,alistoftheinstructionopcodes,andacross-referencetothealgebraicinstruc-tionset.

TMS320C55xOptimizingC/C++CompilerUser’sGuide（literaturenumber

SPRU281）describestheTMS320C55xC/C++Compiler.ThisC/C++compileracceptsISOstandardCandC++sourcecodeandproducesassemblylanguagesourcecodeforTMS320C55xdevices.

TMS320C55xAssemblyLanguageToolsUser’sGuide（literaturenumber

SPRU280）describestheassemblylanguagetools（assembler,linker,andothertoolsusedtodevelopassemblylanguagecode）,assemblerdirectives,macros,commonobjectfileformat,andsymbolicdebuggingdirectivesforTMS320C55xdevices.

TMS320C55xDSPProgrammer’sGuide（literaturenumberSPRU376）

describeswaystooptimizeCandassemblycodefortheTMS320C55xDSPsandexplainshowtowritecodethatusesspecialfeaturesandinstructionsoftheDSPs.

Trademarks

TMS320,TMS320C5000,TMS320C55x,andC55xaretrademarksofTexasInstruments.

Trademarksarethepropertyoftheirrespectiveowners.

4Analog-to-DigitalConverter（ADC）SPRU586B

ContentsContents12

3

4

5IntroductiontotheADC............................................................7TotalConversionTime.............................................................8InitiatingandMonitoringaConversionCycle........................................9ConservingPower.................................................................9ADCRegisters...................................................................10

5.1ADCControlRegister（ADCCTL）..............................................10

5.2ADCDataRegister（ADCDATA）...............................................11

5.3ADCClockDividerRegister（ADCCLKDIV）.....................................13

5.4ADCClockControlRegister（ADCCLKCTL）.....................................15ConversionExample..............................................................166

RevisionHistory.....................................................................18SPRU586BAnalog-to-DigitalConverter（ADC）5

Figures

Figures

12

3

4

5

7ADCBlockDiagram.............................................................7ADCTotalConversionTime......................................................8ADCControlRegister（ADCCTL）.................................................10ADCDataRegister（ADCDATA）..................................................12ADCClockDividerRegister（ADCCLKDIV）........................................13ADCClockControlRegister（ADCCLKCTL）.......................................15TotalConversionTimefortheConversionExample.................................17Tables

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