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ADVance informaTION
TMS470R1A64
16/32-bitriscflashmicrocontroller
SPNS099–NOVEMBER2004
thea64devicehasa10-位-resolutionsample-和-holdmibadc.themibadcchannelscanbeconverted
individuallyorcanbegroupedbysoftwareforsequentialconversionsequences.therearethreeseparate
groupings,twoofwhicharetriggerablebyanexternalevent.eachsequencecanbeconvertedoncewhen
triggeredorconfiguredforcontinuousconversionmode.formoredetailedfunctionalinformationonthemibadc,
seethe
tms470r1xmulti-bufferedanalog-至-digitalconverter(mibadc)referenceguide
(literaturenumber
spnu206).
thezero-pinphase-lockedloop(zpll)clockmodulecontainsaphase-lockedloop,aclock-monitorcircuit,一个
时钟-enablecircuit,andaprescaler(withprescalevaluesof1–8).thefunctionofthezpllistomultiplythe
externalfrequencyreferencetoahigherfrequencyforinternaluse.thezpllprovidesaclktothesystem
(sys)单元.thesysmodulesubsequentlyprovidesthesystemclock(sysclk),real-timeinterruptclock
(rticlk),cpuclock(mclk),andperipheralinterfaceclock(iclk)toallothera64devicemodules.formore
detailedfunctionalinformationonthezpll,seethe
tms470r1xzero-pinphase-lockedloop(zpll)时钟
ModuleReferenceGuide
(literaturenumberspnu212).
便条:
aclkshouldnotbeconfusedwiththemibadcinternalclock,adclk.aclkisthe
continuoussystemclockfromanexternalresonator/crystalreference.
thea64devicealsohasanexternalclockprescaler(ecp)modulethat,whenenabled,outputsacontinuous
externalclock(eclk)onaspecifiedgiopin.theeclkfrequencyisauser-programmableratioofthe
peripheralinterfaceclock(iclk)频率.formoredetailedfunctionalinformationontheecp,seethe
tms470r1xexternalclockprescaler(ecp)referenceguide
(literaturenumberspnu202).
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