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HT66F019 Datasheet(PDF) 22 Page - Holtek Semiconductor Inc |
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HT66F019 Datasheet(HTML) 22 Page - Holtek Semiconductor Inc |
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22 / 175 page  Rev. 1.00 �� De�e��e� 01� �01� Rev. 1.00 �3 De�e��e� 01� �01� HT66F019 A/D Flash MCU with EEPROM HT66F019 A/D Flash MCU with EEPROM Flash Program Memory TheProgramMemoryisthelocationwheretheusercodeorprogramisstored.Forthedevicethe ProgramMemoryisFlashtype,whichmeansitcanbeprogrammedandre-programmedalarge numberoftimes,allowingtheusertheconvenienceofcodemodificationonthesamedevice.By usingtheappropriateprogrammingtools,theFlashdevicesofferuserstheflexibilitytoconveniently debuganddeveloptheirapplicationswhilealsoofferingameansoffieldprogrammingand updating. Structure TheProgramMemoryhasacapacityof8K×16bits.TheProgramMemoryisaddressedbythe ProgramCounterandalsocontainsdata,tableinformationandinterruptentries.Tabledata,which canbesetupinanylocationwithintheProgramMemory,isaddressedbyaseparatetablepointer register. 0000H 0004H 1FFFH Initialisation Ve�to� Inte��upt Ve�to� 16 �its 00�CH Program Memory Structure Special Vectors WithintheProgramMemory,certainlocationsarereservedfortheresetandinterrupts.Thelocation 000Hisreservedforusebythedeviceresetforprograminitialisation.Afteradeviceresetis initiated,theprogramwilljumptothislocationandbeginexecution. Look-up Table AnylocationwithintheProgramMemorycanbedefinedasalook-uptablewhereprogrammerscan storefixeddata.Tousethelook-uptable,thetablepointermustfirstbesetupbyplacingtheaddress ofthelookupdatatoberetrievedinthetablepointerregister,TBLPandTBHP.Theseregisters definethetotaladdressofthelook-uptable. Aftersettingupthetablepointer,thetabledatacanberetrievedfromtheProgramMemoryusing the"TABRD[m]"or"TABRDL[m]"instructions,respectively.Whentheinstructionisexecuted, thelowerordertablebytefromtheProgramMemorywillbetransferredtotheuserdefinedData Memoryregister[m]asspecifiedintheinstruction.Thehigherordertabledatabytefromthe ProgramMemorywillbetransferredtotheTBLHspecialregister. Theaccompanyingdiagramillustratestheaddressingdataflowofthelook-uptable. |
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