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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45F3W 데이터시트(PDF) 23 Page - Holtek Semiconductor Inc |
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HT45F3W 데이터시트(HTML) 23 Page - Holtek Semiconductor Inc |
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23 / 167 page  Rev. 1.50 �� De�e��e� 01� �01� Rev. 1.50 �3 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU Table Read Program Example rombank 1 code1 rombank 1 code1 ds .section ‘data’ tempreg1 db ? ; temporary register #1 tempreg2 db ? ; temporary register #2 : : code0 .section ‘code’ mov a,06h ; initialise table pointer - note that this address is referenced mov tblp,a ; to the last page or the page that tbhp pointed mov a,3fh ; initialise high table pointer mov tbhp,a ; it is not necessary to set tbhp if executing tabrdl : : tabrd tempreg1 tabrdl tempreg1 ; transfers value in table referred by table pointer to tempreg1 ; data at program memory address 3F06H transferred to ; tempreg1 and TBLH dec tblp ; reduce value of table pointer by one tabrd tempreg2 tabrdl tempreg2 ; transfers value in table referenced by table pointer to tempreg2 ; data at program memory address 3F05H transferred to tempreg2 ; and TBLH ; In this example the data “1AH” is transferred to tempreg1 ; and data “0FH” to tempreg2 ; the value “00H” will be transferred to the high byte register TBLH : : code1 .section ‘code’ org 1F00h ; sets initial address of last page dc 00Ah,00Bh,00Ch,00Dh,00Eh,00Fh,01Ah,01Bh : In Circuit Programming – ICP TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientandeasy upgradesandmodificationstotheirprogramsonthesamedevice.Asanadditionalconvenience, Holtekhasprovidedameansofprogrammingthemicrocontrollerin-circuitusinga4-pininterface. Thisprovidesmanufacturerswiththepossibilityofmanufacturingtheircircuitboardscompletewith aprogrammedorun-programmedmicrocontroller,andthenprogrammingorupgradingtheprogram atalaterstage.Thisenablesproductmanufacturerstoeasilykeeptheirmanufacturedproducts suppliedwiththelatestprogramreleaseswithoutremovalandre-insertionofthedevice. TheHoltekFlashMCUtoWriterProgrammingPincorrespondencetableisasfollows: Holtek Writer Pins MCU Programming Pins Pin Description ICPDA PA0 P�og�a��ing Se�ial Data/Add�ess ICPCK PA� P�og�a��ing Clo�k VDD VDD Powe� Supply VSS VSS G�ound TheProgramMemoryandEEPROMdataMemorycanbothbeprogrammedseriallyin-circuitusing this4-wireinterface.Dataisdownloadedanduploadedseriallyonasinglepinwithanadditional linefortheclock.Twoadditionallinesarerequiredforthepowersupply.Thetechnicaldetails |
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