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HT46R004 Fiches technique(PDF) 16 Page - Holtek Semiconductor Inc |
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HT46R004 Fiches technique(HTML) 16 Page - Holtek Semiconductor Inc |
16 / 84 page Rev. 1.30 1� �an�a�� ��� �01� Rev. 1.30 17 �an�a�� ��� �01� HT46R004 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.AllareimplementedinRAMandare8bitswide.Thestartaddress ofthedeviceDataMemoryistheaddress“00H”. Allmicrocontrollerprogramsrequireanareaofread/writememorywheretemporarydatacanbe storedandretrievedforuselater.ItisthisareaofRAMmemorythatisknownasGeneralPurpose DataMemory.ThisareaofDataMemoryisfullyaccessiblebytheuserprogramforbothreading andwritingoperations.Byusingthe“SET[m].i”and“CLR[m].i”instructionsindividualbitscan besetorresetunderprogramcontrolgivingtheuseralargerangeofflexibilityforbitmanipulation intheDataMemory. Data Memory Structure Note:MostoftheDataMemorybitscanbedirectlymanipulatedusingthe“SET[m].i”and“CLR [m].i”withtheexceptionofafewdedicatedbits.TheDataMemorycanalsobeaccessed viathememorypointerregisters. |
Numéro de pièce similaire - HT46R004 |
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Description similaire - HT46R004 |
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