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HT66F20 Datasheet(PDF) 44 Page - Holtek Semiconductor Inc |
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HT66F20 Datasheet(HTML) 44 Page - Holtek Semiconductor Inc |
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44 / 298 page  Rev. 1.90 44 �e���a�� 18� �01� Rev. 1.90 45 �e���a�� 18� �01� HT66F20/HT66F30/HT66F40/HT66F50/HT66F60 HT66FU30/HT66FU40/HT66FU50/HT66FU60 Enhanced A/D Flash Type 8-Bit MCU with EEPROM HT66F20/HT66F30/HT66F40/HT66F50/HT66F60 HT66FU30/HT66FU40/HT66FU50/HT66FU60 Enhanced A/D Flash Type 8-Bit MCU with EEPROM STATUS Register Bit 7 6 5 4 3 2 1 0 Name — — TO PD� OV Z AC C R/W — — R R R/W R/W R/W R/W POR — — 0 0 x x x x “x”: �nknown 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:Anoperationresultsinacarryduringanadditionoperationorifaborrowdoes nottakeplaceduringasubtractionoperation Cisalsoaffectedbyarotatethroughcarryinstruction. |
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