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HT46R003B датащи(PDF) 15 Page - Holtek Semiconductor Inc |
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HT46R003B датащи(HTML) 15 Page - Holtek Semiconductor Inc |
15 / 76 page Rev. 1.00 1� ��ne 1�� �01� Rev. 1.00 15 ��ne 1�� �01� HT46R003B Cost-Effective A/D 8-bit OTP MCU HT46R003B Cost-Effective A/D 8-bit OTP MCU RAM Data Memory TheDataMemoryisavolatileareaof8-bitwideRAMinternalmemoryandisthelocationwhere temporaryinformationisstored. Structure Dividedintotwosections,thefirstoftheseisanareaofRAMwherespecialfunctionregistersare located.Theseregistershavefixedlocationsandarenecessaryforcorrectoperationofthedevice. Manyoftheseregisterscanbereadfromandwrittentodirectlyunderprogramcontrol,however, someremainprotectedfromusermanipulation.ThesecondareaofDataMemoryisreservedfor generalpurposeuse.Alllocationswithinthisareaarereadandwriteaccessibleunderprogram control. ThetwosectionsofDataMemory,theSpecialPurposeandGeneralPurposeDataMemoryare locatedatconsecutivelocations.AllareimplementedinRAMandare8bitswidebutthelengthof eachmemorysectionisdictatedbythetypeofmicrocontrollerchosen.ThestartaddressoftheData Memoryforthedeviceistheaddress“00H”. Allmicrocontrollerprogramsrequireanareaofread/writememorywheretemporarydatacanbe storedandretrievedforuselater.ItisthisareaofRAMmemorythatisknownasGeneralPurpose DataMemory.ThisareaofDataMemoryisfullyaccessiblebytheuserprogramforbothreading andwritingoperations.Byusingthe“SET[m].i”and“CLR[m].i”instructionsindividualbitscan besetorresetunderprogramcontrolgivingtheuseralargerangeofflexibilityforbitmanipulation intheDataMemory. G ener al Pu r pos e R egi st er s S pec ia l Pu r pos e R egi st er s 7F H IA R1 00 H MP 1 01 H 40 H 3F H 64 b yt es 02 H 03 H IA R0 MP 0 Data Memory Structure Note:MostoftheDataMemorybitscanbedirectlymanipulatedusingthe“SET[m].i”and“CLR [m].i”withtheexceptionofafewdedicatedbits.TheDataMemorycanalsobeaccessed viathememorypointerregisters. Special Purpose Data Memory This area of Data Memory is where registers, necessary for the correct operation of the microcontroller,arestored.Mostoftheregistersarebothreadableandwriteablebutsomeare protectedandarereadableonly,thedetailsofwhicharelocatedundertherelevantSpecialFunction Registersection.Notethatforlocationsthatareunused,anyreadinstructiontotheseaddresseswill returnthevalue“00H”. |
Аналогичный номер детали - HT46R003B |
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Аналогичное описание - HT46R003B |
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