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HT68F002 Datasheet(PDF) 19 Page - Holtek Semiconductor Inc |
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HT68F002 Datasheet(HTML) 19 Page - Holtek Semiconductor Inc |
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19 / 119 page  Rev. 1.41 18 April 11, 2017 Rev. 1.41 19 April 11, 2017 HT68F002/HT68F0025/HT68F003 Cost-Effective Flash MCU with EEPROM HT68F002/HT68F0025/HT68F003 Cost-Effective Flash MCU with EEPROM In Circuit Programming TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientandeasy upgradesandmodificationstotheirprogramsonthesamedevice.Asanadditionalconvenience, Holtekhasprovidedameansofprogrammingthemicrocontrollerin-circuitusinga4-pininterface. Thisprovidesmanufacturerswiththepossibilityofmanufacturingtheircircuitboardscompletewith aprogrammedorun-programmedmicrocontroller,andthenprogrammingorupgradingtheprogram atalaterstage.Thisenablesproductmanufacturerstoeasilykeeptheirmanufacturedproducts suppliedwiththelatestprogramreleaseswithoutremovalandre-insertionofthedevice. Holtek Write Pins MCU Programming Pins Function HT68F002/HT68F0025 HT68F003 ICPDA PA0 Programming Serial Data ICPCK PA7 PA2 Programming Serial Clock VDD VDD Power Supply VSS VSS Ground TheProgramMemoryandEEPROMdatamemorycanbothbeprogrammedseriallyin-circuitusing this4-wireinterface.Dataisdownloadedanduploadedseriallyonasinglepinwithanadditional linefortheclock.Twoadditionallinesarerequiredforthepowersupplyandground.Thetechnical detailsregardingthein-circuitprogrammingofthedevicearebeyondthescopeofthisdocument andwillbesuppliedinsupplementaryliterature. * * Wr it er _V DD IC PD A IC PC K Wr it er _V SS To o th er C ir cu it PA 0 PA 7 VS S VD D Wr it er C onne ct or Si gnal s MC U Pr og ra mm in g Pi ns * * Wr it er _V DD IC PD A IC PC K Wr it er _ VSS To o th er C ir cu it PA 0 PA 2 VSS VD D Wr it er C onne ct or Si gnal s MC U Pr og ra mm in g Pi ns HT68F002/HT68F0025 HT68F003 Note:*mayberesistororcapacitor.Theresistanceof*mustbegreaterthan1korthecapacitance of*mustbelessthan1nF. |
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