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HT66F4530 Datasheet(PDF) 76 Page - Holtek Semiconductor Inc

Part # HT66F4530
Description  A/D Flash MCU with Dual Operational Amplifiers
PDF  224 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT66F4530 Datasheet(HTML) 76 Page - Holtek Semiconductor Inc

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Rev. 1.00
7�
De�e��e� �1� �01�
Rev. 1.00
77
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HT66F4530/HT66F4540/HT66F4550
A/D Flash MCU with Dual Operational Amplifiers
HT66F4530/HT66F4540/HT66F4550
A/D Flash MCU with Dual Operational Amplifiers
Pull-high Resistors
Manyproductapplicationsrequirepull-highresistorsfortheirswitchinputsusuallyrequiringthe
useofanexternalresistor.Toeliminatetheneedfortheseexternalresistors,allI/Opins,when
configuredasaninputhavethecapabilityofbeingconnectedtoaninternalpull-highresistor.These
pull-highresistorsareselectedusingregistersPAPU~PDPU,andareimplementedusingweak
PMOStransistors.
Notethatthepull-highresistorcanbecontrolledbytherelevantpull-highcontrolregisteronly
whenthepin-sharedfunctionalpinisselectedasaninputorNMOSoutput.Otherwise,thepull-high
resistorscannotbeenabled.
PxPU Register
Bit
7
6
5
4
3
2
1
0
Na�e
PxPU7
PxPU�
PxPU5
PxPU4
PxPU3
PxPU�
PxPU1
PxPU0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
0
PxPUn:I/OPortxPinpull-highfunctioncontrol
0:Disable
1:Enable
ThePxPUnbitisusedtocontrolthepinpull-highfunction.Herethe"x"canbeA,B,CorD.However,
theactualavailablebitsforeachI/OPortmaybedifferent.
Port A Wake-up
TheHALTinstructionforcesthemicrocontrollerintotheSLEEPorIDLEModewhichpreserves
power,afeaturethatisimportantforbatteryandotherlow-powerapplications.Variousmethods
existtowake-upthemicrocontroller,oneofwhichistochangethelogicconditionononeofthePort
Apinsfromhightolow.Thisfunctionisespeciallysuitableforapplicationsthatcanbewokenup
viaexternalswitches.EachpinonPortAcanbeselectedindividuallytohavethiswake-upfeature
usingthePAWUregister.
Notethatthewake-upfunctioncanbecontrolledbythewake-upcontrolregistersonlywhenthe
pin-sharedfunctionalpinisselectedasgeneralpurposeinput/outputandtheMCUentersthePower
downmode.
PAWU Register
Bit
7
6
5
4
3
2
1
0
Na�e
PAWU7
PAWU�
PAWU5
PAWU4
PAWU3
PAWU�
PAWU1
PAWU0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
0
Bit7~0
PAWU7~PAWU0:PA7~PA0wake-upfunctioncontrol
0:Disable
1:Enable



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