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HT83B60 Datasheet(PDF) 24 Page - Holtek Semiconductor Inc |
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HT83B60 Datasheet(HTML) 24 Page - Holtek Semiconductor Inc |
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24 / 84 page  Rev. 1.00 �4 De�e��e� 1�� �011 Rev. 1.00 �5 De�e��e� 1�� �011 HT83B60 Voice Mask MCU HT83B60 Voice Mask MCU STATUS Register Bit 7 6 5 4 3 2 1 0 Name — — TO PDF OV Z AC C R/W — — R R R/W R/W R/W R/W POR — — 0 0 x x x x “X” unknown Bit7,6 Unimplemented,readas"0" Bit5 TO:WatchdogTime-Outflag 0:Afterpoweruporexecutingthe"CLRWDT"or"HALT"instruction 1:Awatchdogtime-outoccurred. Bit4 PDF:Powerdownflag 0:Afterpoweruporexecutingthe"CLRWDT"instruction 1:Byexecutingthe"HALT"instruction Bit3 OV:Overflowflag 0:nooverflow 1:anoperationresultsinacarryintothehighest-orderbitbutnotacarryoutofthe highest-orderbitorviceversa. Bit2 Z:Zeroflag 0:Theresultofanarithmeticorlogicaloperationisnotzero 1:Theresultofanarithmeticorlogicaloperationiszero Bit1 AC:Auxiliaryflag 0:noauxiliarycarry 1:anoperationresultsinacarryoutofthelownibblesinaddition,ornoborrow fromthehighnibbleintothelownibbleinsubtraction Bit0 C:Carryflag 0:nocarry-out 1:anoperationresultsinacarryduringanadditionoperationorifaborrowdoesnot takeplaceduringasubtractionoperation Cisalsoaffectedbyarotatethroughcarryinstruction. Interrupt Control Register - INTC, INTCH Two8-bitregister,knownastheINTCandINTCHregisters,controlstheoperationofbothexternal andinternaltimerinterrupts.Bysettingvariousbitswithintheseregistersusingstandardbit manipulationinstructions,theenable/disablefunctionoftheexternalandtimerinterruptscanbe independentlycontrolled.Amasterinterruptbitwithinthisregister,theEMIbit,actslikeaglobal enable/disableandisusedtosetalloftheinterruptenablebitsonoroff.Thisbitisclearedwhenan interruptroutineisenteredtodisablefurtherinterruptandissetbyexecutingthe"RETI"instruction. Note:Insituationswhereotherinterruptsmayrequireservicingwithinpresentinterruptservice routines,theEMIbitcanbemanuallysetbytheprogramafterthepresentinterruptservice routinehasbeenentered. Timer Registers Alldevicescontaintwo8-bitTimerswhoseassociatedregistersareknownasTMR0andTMR1 whichisthelocationwheretheassociatedtimer's8-bitvalueislocated.Theirassociatedcontrol registers,knownasTMR0CandTMR1C,containthesetupinformationforthesetimers. Notethatalltimerregisterscanbedirectlywrittentoinordertopreloadtheircontentswithfixed datatoallowdifferenttimeintervalstobesetup. |
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