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HT66F319 Datasheet(PDF) 23 Page - Holtek Semiconductor Inc

Part # HT66F319
Description  Enhanced A/D Flash MCU with EEPROM and UART
PDF  185 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT66F319 Datasheet(HTML) 23 Page - Holtek Semiconductor Inc

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Rev. 1.20
22
De�e��e� 0�� 201�
Rev. 1.20
23
De�e��e� 0�� 201�
HT66F319
Enhanced A/D Flash MCU with EEPROM and UART
HT66F319
Enhanced A/D Flash MCU with EEPROM and UART
In Circuit Programming – ICP
TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientandeasy
upgradesandmodificationstotheirprogramsonthesamedevice.Asanadditionalconvenience,
Holtekhasprovidedameansofprogrammingthemicrocontrollerin-circuitusinga4-pininterface.
Thisprovidesmanufacturerswiththepossibilityofmanufacturingtheircircuitboardscompletewith
aprogrammedorun-programmedmicrocontroller,andthenprogrammingorupgradingtheprogram
atalaterstage.Thisenablesproductmanufacturerstoeasilykeeptheirmanufacturedproducts
suppliedwiththelatestprogramreleaseswithoutremovalandre-insertionofthedevice.
TheHoltekFlashMCUtoWriterProgrammingPincorrespondencetableisasfollows:
Holtek Writer Pins
MCU Programming Pins
Pin Description
ICPDA
PA0
P�og�a��ing Se�ial Data/Add�ess
ICPCK
PA2
P�og�a��ing Clo�k
VDD
VDD
Powe� Supply
VSS
VSS
G�ound
TheProgramMemoryandEEPROMdataMemorycanbothbeprogrammedseriallyin-circuitusing
this4-wireinterface.Dataisdownloadedanduploadedseriallyonasinglepinwithanadditional
linefortheclock.Twoadditionallinesarerequiredforthepowersupply.Thetechnicaldetails
regardingthein-circuitprogrammingofthedevicearebeyondthescopeofthisdocumentandwill
besuppliedinsupplementaryliterature.
Duringtheprogrammingprocess,takingcontroloftheICPDAandICPCKpinsfordataandclock
programmingpurposes.Theusermusttheretakecaretoensurethatnootheroutputsareconnected
tothesetwopins.
*
*
Wr it er _V DD
IC PD A
IC PC K
Wr it er _ VSS
To o th er C ir cu it
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
PA0
Note:*mayberesistororcapacitor.Theresistanceof*mustbegreaterthan1korthecapacitance
of*mustbelessthan1nF.



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