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HT45F4MA 데이터시트(PDF) 24 Page - Holtek Semiconductor Inc

부품명 HT45F4MA
상세설명  Power Bank Flash MCU
PDF  145 Pages
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제조업체  HOLTEK [Holtek Semiconductor Inc]
홈페이지  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F4MA 데이터시트(HTML) 24 Page - Holtek Semiconductor Inc

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Rev. 1.20
2�
De�e��e� 1�� 201�
Rev. 1.20
25
De�e��e� 1�� 201�
HT45F4MA/HT45FH4MA/HT45FH4MA-1
Power Bank Flash MCU
HT45F4MA/HT45FH4MA/HT45FH4MA-1
Power Bank Flash MCU
In Circuit Programming
TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientandeasy
upgradesandmodificationstotheirprogramsonthesamedevice.Asanadditionalconvenience,
Holtekhasprovidedameansofprogrammingthemicrocontrollerin-circuitusinga4-pininterface.
Thisprovidesmanufacturerswiththepossibilityofmanufacturingtheircircuitboardscompletewith
aprogrammedorun-programmedmicrocontroller,andthenprogrammingorupgradingtheprogram
atalaterstage.Thisenablesproductmanufacturerstoeasilykeeptheirmanufacturedproducts
suppliedwiththelatestprogramreleaseswithoutremovalandre-insertionofthedevice.
TheHoltekFlashMCUtoWriterProgrammingPincorrespondencetableisasfollows:
Holtek Writer Pins
MCU Programming Pins
Pin Description
ICPDA
PA�
P�og�a��ing Se�ial Data/Add�ess
ICPCK
PA7
P�og�a��ing Clo�k
VDD
VDD
Powe� Supply
VSS
VSS
G�ound
Duringtheprogrammingprocess,theusermusttakecaretoensurethatnootheroutputsare
connectedtothesetwopins.
TheProgramMemoryandEEPROMdatamemorycanbothbeprogrammedseriallyin-circuitusing
this4-wireinterface.Dataisdownloadedanduploadedseriallyonasinglepinwithanadditional
linefortheclock.Twoadditionallinesarerequiredforthepowersupply.Thetechnicaldetails
regardingthein-circuitprogrammingofthedevicearebeyondthescopeofthisdocumentandwill
besuppliedinsupplementaryliterature.
*
*
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 6
PA7
VS S
VD D
Wr it er C onne ct or
Si gnal s
MC U Pr og ra mm in g
Pi ns
Note:*mayberesistororcapacitor.Theresistanceof*mustbegreaterthan1korthecapacitance
of*mustbelessthan1nF.



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