HT66F319 datasheet(84/185 Pages) HOLTEK

84 / 185 page

Rev. 1.20

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Rev. 1.20

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HT66F319

Enhanced A/D Flash MCU with EEPROM and UART

HT66F319

Enhanced A/D Flash MCU with EEPROM and UART

Standard Type TM Operating Modes

TheStandardTypeTMcanoperateinoneoffiveoperatingmodes,CompareMatchOutputMode,

PWMOutputMode,SinglePulseOutputMode,CaptureInputModeorTimer/CounterMode.The

operatingmodeisselectedusingtheTnM1andTnM0bitsintheTMnC1register.

Compare Output Mode

Toselectthismode,bitsTnM1andTnM0intheTMnC1register,shouldbesetto00respectively.

Inthismodeoncethecounterisenabledandrunningitcanbeclearedbythreemethods.Theseare

acounteroverflow,acomparematchfromComparatorAandacomparematchfromComparatorP.

WhentheTnCCLRbitislow,therearetwowaysinwhichthecountercanbecleared.Oneiswhen

acomparematchfromComparatorP,theotheriswhentheCCRPbitsareallzerowhichallows

thecountertooverflow.HerebothTnAFandTnPFinterruptrequestflagsforComparatorAand

ComparatorPrespectively,willbothbegenerated.

IftheTnCCLRbitintheTMnC1registerishighthenthecounterwillbeclearedwhenacompare

matchoccursfromComparatorA.However,hereonlytheTnAFinterruptrequestflagwillbe

generatedevenifthevalueoftheCCRPbitsislessthanthatoftheCCRAregisters.Thereforewhen

TnCCLRishighnoTnPFinterruptrequestflagwillbegenerated.IntheCompareMatchOutput

Mode,theCCRAcannotbesetto"0".

Asthenameofthemodesuggests,afteracomparisonismade,theTMoutputpin,willchange

state.TheTMoutputpinconditionhoweveronlychangesstatewhenaTnAFinterruptrequestflag

isgeneratedafteracomparematchoccursfromComparatorA.TheTnPFinterruptrequestflag,

generatedfromacomparematchoccursfromComparatorP,willhavenoeffectontheTMoutput

pin.ThewayinwhichtheTMoutputpinchangesstatearedeterminedbytheconditionofthe

TnIO1andTnIO0bitsintheTMnC1register.TheTMoutputpincanbeselectedusingtheTnIO1

andTnIO0bitstogohigh,togolowortotogglefromitspresentconditionwhenacomparematch

occursfromComparatorA.TheinitialconditionoftheTMoutputpin,whichissetupafterthe

TnONbitchangesfromlowtohigh,issetupusingtheTnOCbit.NotethatiftheTnIO1andTnIO0

bitsarezerothennopinchangewilltakeplace.

HT66F319 Datasheet(PDF) 84 Page - Holtek Semiconductor Inc