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HT45F5R Datasheet(PDF) 55 Page - Holtek Semiconductor Inc

Part # HT45F5R
Description  Charger ASSP Flash MCU
PDF  138 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F5R Datasheet(HTML) 55 Page - Holtek Semiconductor Inc

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Rev. 1.10
54
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Rev. 1.10
55
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HT45F5R
Charger ASSP Flash MCU
HT45F5R
Charger ASSP Flash MCU
Port A Wake-up
TheHALTinstructionforcesthemicrocontrollerintotheSLEEPorIDLEModewhichpreserves
power,afeaturethatisimportantforbatteryandotherlow-powerapplications.Variousmethods
existtowake-upthemicrocontroller,oneofwhichistochangethelogicconditionononeofthePort
Apinsfromhightolow.Thisfunctionisespeciallysuitableforapplicationsthatcanbewokenup
viaexternalswitches.EachpinonPortAcanbeselectedindividuallytohavethiswake-upfeature
usingthePAWUregister.Notethatthewake-upfunctioncanbecontrolledbythewake-upcontrol
registersonlywhenthepin-sharedfunctionalpinisselectedasgeneralpurposeinput/outputandthe
MCUentersthePowerdownmode.
PAWU Register
Bit
7
6
5
4
3
2
1
0
Na�e
PAWU7
PAWU�
PAWU5
PAWU4
PAWU�
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
PAWUn:PortAPinwake-upfunctioncontrol
0:Disable
1:Enable
I/O Port Control Registers
EachI/OporthasitsowncontrolregisterknownasPAC~PCC,tocontroltheinput/output
configuration.Withthesecontrolregisters,eachCMOSoutputorinputcanbereconfigured
dynamicallyundersoftwarecontrol.EachpinoftheI/Oportsisdirectlymappedtoabitinits
associatedportcontrolregister.FortheI/Opintofunctionasaninput,thecorrespondingbitofthe
controlregistermustbewrittenasa"1".Thiswillthenallowthelogicstateoftheinputpintobe
directlyreadbyinstructions.Whenthecorrespondingbitofthecontrolregisteriswrittenasa"0",
theI/OpinwillbesetupasaCMOSoutput.Ifthepiniscurrentlysetupasanoutput,instructions
canstillbeusedtoreadtheoutputregister.However,itshouldbenotedthattheprogramwillinfact
onlyreadthestatusoftheoutputdatalatchandnottheactuallogicstatusoftheoutputpin.
PxC Register
Bit
7
6
5
4
3
2
1
0
Na�e
PxC7
PxC�
PxC5
PxC4
PxC�
PxC�
PxC1
PxC0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
1
1
1
1
1
1
1
1
PxCn:I/OPortxPintypeselection
0:Output
1:Input
ThePxCnbitisusedtocontrolthepintypeselection.Herethe"x"canbeA,B,andC.However,the
actualavailablebitsforeachI/OPortmaybedifferent.



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