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HT45F4830 Datasheet(PDF) 21 Page - Holtek Semiconductor Inc |
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HT45F4830 Datasheet(HTML) 21 Page - Holtek Semiconductor Inc |
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21 / 120 page  Rev. 1.12 20 April 11, 2017 Rev. 1.12 21 April 11, 2017 HT45F4830 Digital Servo Flash MCU with Driver HT45F4830 Digital Servo Flash MCU with Driver In Circuit Programming – ICP TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientandeasy upgradesandmodificationstotheirprogramsonthesamedevice.Asanadditionalconvenience, Holtekhasprovidedameansofprogrammingthemicrocontrollerin-circuitusinga4-pininterface. Thisprovidesmanufacturerswiththepossibilityofmanufacturingtheircircuitboardscompletewith aprogrammedorun-programmedmicrocontroller,andthenprogrammingorupgradingtheprogram atalaterstage.Thisenablesproductmanufacturerstoeasilykeeptheirmanufacturedproducts suppliedwiththelatestprogramreleaseswithoutremovalandre-insertionofthedevice. TheHoltekFlashMCUtoWriterProgrammingPincorrespondencetableisasfollows: Holtek Write Pins MCU Programming Pins Function ICPDA PA0 Programming Serial Data/Address ICPCK PA2 Programming Serial Clock VDD VDD Power Supply VSS VSS Ground TheProgramMemoryandEEPROMdatamemorycanbothbeprogrammedseriallyin-circuitusing this4-wireinterface.Dataisdownloadedanduploadedseriallyonasinglepinwithanadditional linefortheclock.Twoadditionallinesarerequiredforthepowersupplyandground.Thetechnical detailsregardingthein-circuitprogrammingofthedevicearebeyondthescopeofthisdocument andwillbesuppliedinsupplementaryliterature. Duringtheprogrammingprocess,takingcontroloftheICPDAandICPCKpinsfordataandclock programmingpurposes.Theusermusttheretakecaretoensurethatnootheroutputsareconnected tothesetwopins. * 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. |
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