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HT82B42R Folha de dados(PDF) 24 Page - Holtek Semiconductor Inc |
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HT82B42R Folha de dados(HTML) 24 Page - Holtek Semiconductor Inc |
24 / 84 page Rev. 1.10 �� �ove��e� 0�� �01� Rev. 1.10 �� �ove��e� 0�� �01� HT82B42R/HT82B42RE I/O MCU with USB Interface STATUS Register Bit 7 6 5 4 3 2 1 0 �a�e — — 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. Bank Pointer – BP TheSpecialPurposeDataMemoryisdividedintotwoBanks,Bank0andBank1.TheUSBcontrol registersarelocatedinBank1,whileallotherregistersarelocatedinBank0.TheBankPointer selectswhichbankdataistobeaccessedfrom.IfBank0istobeaccessedthenBPmustbesettoa valueof00H,whileifBank1istobeaccessedthenBPmustbesettoavalueof01H. Ba nk P oi nt er b7 b0 BP0 BP0 D at a Me mo ry 0 B an k 0 1 B an k 1 No t us ed , mu st b e re se t to " 0" Bank Pointer |
Nº de peça semelhante - HT82B42R_14 |
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Descrição semelhante - HT82B42R_14 |
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