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HT46R068B 데이터시트(PDF) 25 Page - Holtek Semiconductor Inc |
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HT46R068B 데이터시트(HTML) 25 Page - Holtek Semiconductor Inc |
25 / 135 page Rev. 1.50 �4 �e���a�� 05� �015 Rev. 1.50 �5 �e���a�� 05� �015 HT46R068B/HT46R069B Enhanced A/D 8-Bit OTP MCU HT46R068B/HT46R069B Enhanced A/D 8-Bit OTP MCU Special Function Registers Toensuresuccessfuloperationofthemicrocontroller,certaininternalregistersareimplementedin theDataMemoryarea.Theseregistersensurecorrectoperationofinternalfunctionssuchastimers, interrupts,etc.,aswellasexternalfunctionssuchasI/Odatacontrol.Thelocationoftheseregisters withintheDataMemorybeginsattheaddress"00H"andaremappedfromBank0toBank7.Any unusedDataMemorylocationsbetweenthesespecialfunctionregistersandthepointwherethe GeneralPurposeMemorybeginsisreservedandattemptingtoreaddatafromtheselocationswill returnavalueof"00H". Indirect Addressing Registers – IAR0, IAR1 TheIndirectAddressingRegisters,IAR0andIAR1,althoughhavingtheirlocationsinnormalRAM registerspace,donotactuallyphysicallyexistasnormalregisters.Themethodofindirectaddressing forRAMdatamanipulationusestheseIndirectAddressingRegistersandMemoryPointers,in contrasttodirectmemoryaddressing,wheretheactualmemoryaddressisspecified.Actionsonthe IAR0andIAR1registerswillresultinnoactualreadorwriteoperationtotheseregistersbutrather tothememorylocationspecifiedbytheircorrespondingMemoryPointer,MP0orMP1.Actingas apair,IAR0withMP0andIAR1withMP1cantogetheraccessdatafromtheDataMemory.As theIndirectAddressingRegistersarenotphysicallyimplemented,readingtheIndirectAddressing Registersindirectlywillreturnaresultof"00H"andwritingtotheregistersindirectlywillresultin nooperation. Memory Pointers – MP0, MP1 TwoMemoryPointers,knownasMP0andMP1areprovided.TheseMemoryPointersare physicallyimplementedintheDataMemoryandcanbemanipulatedinthesamewayasnormal registersprovidingaconvenientwaywithwhichtoindirectlyaddressandtrackdata.MP0canonly beusedtoindirectlyaddressdatainBank0whileMP1canbeusedtoaddressdatafromBank0 andBank7.WhenanyoperationtotherelevantIndirectAddressingRegistersiscarriedout,the actualaddressthatthemicrocontrollerisdirectedto,istheaddressspecifiedbytherelatedMemory Pointer.NotethatindirectaddressingusingMP1andIAR1mustbeusedtoaccessanydatainBank 1~Bank7.ThefollowingexampleshowshowtoclearasectionoffourDataMemorylocations alreadydefinedaslocationsadres1toadres4. HT46R068B HT46R069B 00H IAR0 IAR0 01H MP0 MP0 0�H IAR1 IAR1 03H MP1 MP1 04H BP BP 05H ACC ACC 06H PCL PCL 07H TBLP TBLP 08H TBLH TBLH 09H WDTS WDTS 0AH STATUS STATUS 0BH INTC0 INTC0 0CH TMR0 TMR0 0DH TMR0C TMR0C 0EH TMR1 TMR1 |
유사한 부품 번호 - HT46R068B_15 |
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유사한 설명 - HT46R068B_15 |
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