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HT66F019 Datasheet(PDF) 24 Page - Holtek Semiconductor Inc

Part # HT66F019
Description  A/D Flash MCU with EEPROM
PDF  175 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT66F019 Datasheet(HTML) 24 Page - Holtek Semiconductor Inc

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Rev. 1.00
�4
De�e��e� 01� �01�
Rev. 1.00
�5
De�e��e� 01� �01�
HT66F019
A/D Flash MCU with EEPROM
HT66F019
A/D Flash MCU with EEPROM
In Circuit Programming – ICP
TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientand
easyupgradesandmodificationstotheirprogramsonthesamedevice.
Asanadditionalconvenience,Holtekhasprovidedameansofprogrammingthemicrocontrollerin-
circuitusinga4-pininterface.Thisprovidesmanufacturerswiththepossibilityofmanufacturing
theircircuitboardscompletewithaprogrammedorun-programmedmicrocontroller,andthen
programmingorupgradingtheprogramatalaterstage.Thisenablesproductmanufacturerstoeasily
keeptheirmanufacturedproductssuppliedwiththelatestprogramreleaseswithoutremovalandre-
insertionofthedevice.
TheHoltekFlashMCUtoWriterProgrammingPincorrespondencetableisasfollows:
Holtek Write Pins
MCU Programming Pins
Function
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
TheProgramMemoryandEEPROMDataMemorycanbeprogrammedseriallyin-circuitusingthis
4-wireinterface.Dataisdownloadedanduploadedseriallyonasinglepinwithanadditionalline
fortheclock.Twoadditionallinesarerequiredforthepowersupply.Thetechnicaldetailsregarding
thein-circuitprogrammingofthedevicearebeyondthescopeofthisdocumentandwillbesupplied
insupplementaryliterature.
Duringtheprogrammingprocess,theusermusttakecareoftheICPDAandICPCKpinsfordata
andclockprogrammingpurposestoensurethatnootheroutputsareconnectedtothesetwopins.
*
*
W�ite�_VDD
ICPDA
ICPCK
W�ite�_VSS
To othe� Ci��uit
VDD
PA0
PA�
VSS
W�ite� Conne�to�
Signals
MCU P�og�a��ing
Pins
Note:*mayberesistororcapacitor.Theresistanceof*mustbegreaterthan1kΩorthecapacitance
of*mustbelessthan1nF.



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