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HT68F005 Datasheet(PDF) 50 Page - Holtek Semiconductor Inc

Part # HT68F005
Description  Enhanced I/O Flash Type MCU
PDF  93 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT68F005 Datasheet(HTML) 50 Page - Holtek Semiconductor Inc

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Rev. 1.00
50
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HT68F005/HT68F006
Enhanced I/O Flash Type MCU
HT68F005/HT68F006
Enhanced I/O Flash Type MCU
Port A Wake-up
TheHALTinstructionforcesthemicrocontrollerintotheSLEEPorIDLEModewhichpreserves
power,afeaturethatisimportantforbatteryandotherlow-powerapplications.Variousmethods
existtowake-upthemicrocontroller,oneofwhichistochangethelogicconditionononeofthe
PortApinsfromhightolow.Thisfunctionisespeciallysuitableforapplicationsthatcanbewoken
upviaexternalswitches.EachpinonPortAcanbeselectedindividuallytohavethiswake-up
featureusingthePAWUregister.
PAWU Register
Bit
7
6
5
4
3
2
1
0
Name
D7
D6
D5
D4
D3
D�
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
P�R
0
0
0
0
0
0
0
0
Bit7~0
PAWU:PortAbit7~bit0Wake-upControl
0:Disable
1:Enable
I/O Port Control Registers
EachI/OporthasitsowncontrolregisterknownasPAC,tocontroltheinput/outputconfiguration.
Withthiscontrolregister,eachCMOSoutputorinputcanbereconfigureddynamicallyunder
softwarecontrol.EachpinoftheI/Oportsisdirectlymappedtoabitinitsassociatedportcontrol
register.FortheI/Opintofunctionasaninput,thecorrespondingbitofthecontrolregistermust
bewrittenasa“1”.Thiswillthenallowthelogicstateoftheinputpintobedirectlyreadby
instructions.Whenthecorrespondingbitofthecontrolregisteriswrittenasa“0”,theI/Opinwill
besetupasaCMOSoutput.Ifthepiniscurrentlysetupasanoutput,instructionscanstillbeused
toreadtheoutputregister.However,itshouldbenotedthattheprogramwillinfactonlyreadthe
statusoftheoutputdatalatchandnottheactuallogicstatusoftheoutputpin.
PAC Register
Bit
7
6
5
4
3
2
1
0
Name
D7
D6
D5
D4
D3
D�
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
P�R
1
1
1
1
1
1
1
1
Bit7~0
I/OPortAbit7~bit0Input/OutputControl
0:Output
1:Input



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