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HT45F5R Datasheet(PDF) 68 Page - Holtek Semiconductor Inc |
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HT45F5R Datasheet(HTML) 68 Page - Holtek Semiconductor Inc |
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68 / 138 page ![]() Rev. 1.10 �8 De�e��e� 1�� �01� Rev. 1.10 �9 De�e��e� 1�� �01� HT45F5R Charger ASSP Flash MCU HT45F5R Charger ASSP Flash MCU STMAL Register Bit 7 6 5 4 3 2 1 0 Na�e D7 D� D5 D4 D� D� D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~0 D7~D0:STMCCRAlowbyteregisterbit7~bit0 STM10-bitcounterbit7~bit0 STMAH Register Bit 7 6 5 4 3 2 1 0 Na�e — — — — — — D9 D8 R/W — — — — — — R R POR — — — — — — 0 0 Bit7~2 Unimplemented,readas"0" Bit1~0 D9~D8:STMCCRAhighbyteregisterbit1~bit0 STM10-bitcounterbit9~bit8 Standard Type TM Operating Modes TheStandardTypeTMcanoperateinoneoffiveoperatingmodes,CompareMatchOutputMode, PWMOutputMode,SinglePulseOutputMode,CaptureInputModeorTimer/CounterMode.The operatingmodeisselectedusingtheSTM1andSTM0bitsintheSTMC1register. Compare Output Mode Toselectthismode,bitsSTM1andSTM0intheSTMC1register,shouldbesetto00respectively. Inthismodeoncethecounterisenabledandrunningitcanbeclearedbythreemethods.Theseare acounteroverflow,acomparematchfromComparatorAandacomparematchfromComparatorP. WhentheSTCCLRbitislow,therearetwowaysinwhichthecountercanbecleared.Oneiswhen acomparematchfromComparatorP,theotheriswhentheCCRPbitsareallzerowhichallowsthe countertooverflow.HerebothSTMAFandSTMPFinterruptrequestflagsforComparatorAand ComparatorPrespectively,willbothbegenerated. IftheSTCCLRbitintheSTMC1registerishighthenthecounterwillbeclearedwhenacompare matchoccursfromComparatorA.However,hereonlytheSTMAFinterruptrequestflagwillbe generatedevenifthevalueoftheCCRPbitsislessthanthatoftheCCRAregisters.Thereforewhen STCCLRishighnoSTMPFinterruptrequestflagwillbegenerated.IntheCompareMatchOutput Mode,theCCRAcannotbesetto"0".IftheCCRAbitsareallzero,thecounterwilloverflowwhen itreachesitsmaximum10-bit,3FFHex,value,howeverheretheSTMAFinterruptrequestflagwill notbegenerated. Asthenameofthemodesuggests,afteracomparisonismade,theSTMoutputpin,willchange state.TheSTMoutputpinconditionhoweveronlychangesstatewhenanSTMAFinterruptrequest flagisgeneratedafteracomparematchoccursfromComparatorA.TheSTMPFinterruptrequest flag,generatedfromacomparematchoccursfromComparatorP,willhavenoeffectontheSTM outputpin.ThewayinwhichtheSTMoutputpinchangesstatearedeterminedbytheconditionof theSTIO1andSTIO0bitsintheSTMC1register.TheSTMoutputpincanbeselectedusingthe STIO1andSTIO0bitstogohigh,togolowortotogglefromitspresentconditionwhenacompare matchoccursfromComparatorA.TheinitialconditionoftheSTMoutputpin,whichissetupafter theSTONbitchangesfromlowtohigh,issetupusingtheSTOCbit.NotethatiftheSTIO1and STIO0bitsarezerothennopinchangewilltakeplace. |
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