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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT66F4530 데이터시트(PDF) 46 Page - Holtek Semiconductor Inc |
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HT66F4530 데이터시트(HTML) 46 Page - Holtek Semiconductor Inc |
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46 / 224 page  Rev. 1.00 4� De�e��e� �1� �01� Rev. 1.00 47 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers • PDFisclearedbyasystempower-uporexecutingthe"CLRWDT"instruction.PDFissetby executingthe"HALT"instruction. • TOisclearedbyasystempower-uporexecutingthe"CLRWDT"or"HALT"instruction.TOis setbyaWDTtime-out. • CZistheoperationalresultofdifferentflagsfordifferentinstructions.Refertoregister definitionsformoredetails. • SCistheresultofthe"XOR"operationwhichisperformedbytheOVflagandtheMSBofthe currentinstructionoperationresult. Inaddition,onenteringaninterruptsequenceorexecutingasubroutinecall,thestatusregisterwill notbepushedontothestackautomatically.Ifthecontentsofthestatusregistersareimportantand ifthesubroutinecancorruptthestatusregister,precautionsmustbetakentocorrectlysaveit.Note thatbits0~3oftheSTATUSregisterarebothreadableandwriteablebits. STATUS Register Bit 7 6 5 4 3 2 1 0 Na�e SC CZ TO PDF OV Z AC C R/W R R R R R/W R/W R/W R/W POR x x 0 0 x x x x "x" unknown Bit7 SC:Theresultofthe"XOR"operationwhichisperformedbytheOVflagandthe MSBoftheinstructionoperationresult. Bit6 CZ:Theoperationalresultofdifferentflagsfordifferentinstructions. ForSUB/SUBM/LSUB/LSUBMinstructions,theCZflagisequaltotheZflag. ForSBC/SBCM/LSBC/LSBCMinstructions,theCZflagisthe"AND"operation resultwhichisperformedbythepreviousoperationCZflagandcurrentoperationzero flag. Forotherinstructions,theCZflagwillnotbeaffected. 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:Anoperationresultsinacarryduringanadditionoperationorifaborrowdoes nottakeplaceduringasubtractionoperation The"C"flagisalsoaffectedbyarotatethroughcarryinstruction. |
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