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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45FM2C 데이터시트(PDF) 23 Page - Holtek Semiconductor Inc |
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HT45FM2C 데이터시트(HTML) 23 Page - Holtek Semiconductor Inc |
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23 / 171 page  Rev. 1.10 �� �a� �0� �01� Rev. 1.10 �� �a� �0� �01� HT45FM2C Brushless DC Motor Flash Type 8-Bit MCU HT45FM2C Brushless DC Motor Flash Type 8-Bit MCU Preliminar� In Circuit Programming TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientand easyupgradesandmodificationstotheirprogramsonthesamedevice. Asanadditionalconvenience,Holtekhasprovidedameansofprogrammingthemicrocontroller in-circuitusinga5-pininterface.Thisprovidesmanufacturerswiththepossibilityofmanufacturing theircircuitboardscompletewithaprogrammedorun-programmedmicrocontroller,andthen programmingorupgradingtheprogramatalaterstage.Thisenablesproductmanufacturerstoeasily keeptheirmanufacturedproductssuppliedwiththelatestprogramreleaseswithoutremovaland re-insertionofthedevice. MCU Programming Pins Function PA0 Serial Data Input/Output PA� Serial Clock PB0 In Circuit Programming �ode Set VDD Power Suppl� VSS Ground TheProgramMemoryandEEPROMdatamemorycanbothbeprogrammedseriallyin-circuitusing this5-wireinterface.Dataisdownloadedanduploadedseriallyonasinglepinwithanadditional linefortheclock.Twoadditionallinesarerequiredforthepowersupplyandincircuitprogramming Modeset.Thetechnicaldetailsregardingtheincircuitprogrammingofthedeviceisbeyondthe scopeofthisdocumentandwillbesuppliedinsupplementaryliterature. DuringtheprogrammingprocessthePB0pinwillbeusedtosettheincircuitprogramingModeand takingcontrolofthePA0andPA2I/Opinsfordataandclockprogrammingpurposes.Theusermust theretakecaretoensurethatnootheroutputsareconnectedtothesetwopins. * * * Wr it er _V DD IC PM S IC PD A IC PC K Wr it er _V SS To o t her C ir cu it PA 0 PA 2 VS S PB 0 VD D Wr it er C onnec to r Si g nal s MC U Pr og ra mm in g Pi ns Note:*mayberesistororcapacitor.Theresistanceof*mustbe greaterthan1kΩorthecapacitanceof*mustbelessthan1nF. Programmer Pin MCU Pins ICP�S PB0 ICPDA PA0 ICPCK PA� Programmer and MCU Pins |
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