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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT66F302 датащи(PDF) 21 Page - Holtek Semiconductor Inc |
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HT66F302 датащи(HTML) 21 Page - Holtek Semiconductor Inc |
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21 / 129 page  Rev. 1.11 20 April 11, 2017 Rev. 1.11 21 April 11, 2017 HT66F302/HT66F303 Cost-Effective Flash MCU with EEPROM HT66F302/HT66F303 Cost-Effective Flash MCU with EEPROM In Circuit Programming TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientandeasy upgradesandmodificationstotheirprogramsonthesamedevice.Asanadditionalconvenience, Holtekhasprovidedameansofprogrammingthemicrocontrollerin-circuitusinga4-pininterface. Thisprovidesmanufacturerswiththepossibilityofmanufacturingtheircircuitboardscompletewith aprogrammedorun-programmedmicrocontroller,andthenprogrammingorupgradingtheprogram atalaterstage.Thisenablesproductmanufacturerstoeasilykeeptheirmanufacturedproducts suppliedwiththelatestprogramreleaseswithoutremovalandre-insertionofthedevice. Holtek Writer Pins MCU Programming Pins Pin Description ICPDA PA0 Programming Serial Data/Address ICPCK PA2 Programming Clock VDD VDD Power Supply VSS VSS Ground TheProgramMemoryandEEPROMdatamemorycanbothbeprogrammedseriallyin-circuitusing this4-wireinterface.Dataisdownloadedanduploadedseriallyonasinglepinwithanadditional linefortheclock.Twoadditionallinesarerequiredforthepowersupplyandground.Thetechnical detailsregardingthein-circuitprogrammingofthedevicearebeyondthescopeofthisdocument andwillbesuppliedinsupplementaryliterature. * * Writer_VDD ICPDA ICPCK Writer_VSS To other Circuit VDD PA0 PA2 VSS Writer Connector Signals MCU Programming Pins Note:*mayberesistororcapacitor.Theresistanceof*mustbegreaterthan1kΩorthecapacitance of*mustbelessthan1nF. On-Chip Debug Support – OCDS ThereisanEVchipwhichisusedtoemulatetheHT66F302/HT66F303devices.ThisEVchip devicealsoprovidesan“On-ChipDebug”functiontodebugthedeviceduringthedevelopment process.TheEVchipandtheactualMCUdevicearealmostfunctionallycompatibleexceptfor the“On-ChipDebug”function.UserscanusetheEVchipdevicetoemulatetherealchipdevice behaviorbyconnectingtheOCDSDAandOCDSCKpinstotheHoltekHT-IDEdevelopmenttools. TheOCDSDApinistheOCDSData/Addressinput/outputpinwhiletheOCDSCKpinistheOCDS clockinputpin.WhenusersusetheEVchipfordebugging,otherfunctionswhicharesharedwith theOCDSDAandOCDSCKpinsintheactualMCUdevicewillhavenoeffectintheEVchip. However,thetwoOCDSpinswhicharepin-sharedwiththeICPprogrammingpinsarestillusedas theFlashMemoryprogrammingpinsforICP.ForamoredetailedOCDSdescription,refertothe correspondingdocumentnamed“Holteke-Linkfor8-bitMCUOCDSUser’sGuide”. Holtek e-Link Pins EV Chip Pins Pin Description OCDSDA OCDSDA On-chip Debug Support Data/Address input/output OCDSCK OCDSCK On-chip Debug Support Clock input VDD VDD Power Supply VSS VSS Ground |
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