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HT45R2K-C Folha de dados(PDF) 79 Page - Holtek Semiconductor Inc

Nome de Peças HT45R2K-C
Descrição Electrónicos  Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale
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Fabricante Electrônico  HOLTEK [Holtek Semiconductor Inc]
Página de início  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45R2K-C Folha de dados(HTML) 79 Page - Holtek Semiconductor Inc

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Rev. 1.40
78
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Rev. 1.40
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HT45R2K-C/-B/-A
Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale
HT45R2K-C/-B/-A
Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale
LCDOUT Register
Bit
7
6
5
4
3
2
1
0
Name
LCDS7
LCDS6
LCDS�
LCDS4
LCDS3
LCDS�
LCDS1
LCDS0
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
LCDS7:SelectSEG7orI/O
0:I/O
1:SEG7
Bit6
LCDS6:SelectSEG6orI/O
0:I/O
1:SEG6
Bit5
LCDS5:SelectSEG5orI/O
0:I/O
1:SEG5
Bit4
LCDS4:SelectSEG4orI/O
0:I/O
1:SEG4
Bit3
LCDS3:SelectSEG3orI/O
0:I/O
1:SEG3
Bit2
LCDS2:SelectSEG2orI/O
0:I/O
1:SEG2
Bit1
LCDS1:SelectSEG1orI/O
0:I/O
1:SEG1
Bit0
LCDS0:SelectSEG0orI/O
0:I/O
1:SEG0
LCD Clock
TheLCDclockisdrivenbythefSUBclock,whichthenpassesthroughadivider,thedivisionratioof
whichisselectedbytheLCDclockselectionbits,LCDCK1andLCDCK0,intheCTRL0register
toprovideaLCDclockfrequencyoffSUB/3,fSUB/4orfSUB/8.TheLCDclocksourcefSUBcanbe
derivedfromtheLIRCorLXToscillatorselectedbytheselectionbit,namedFSUBS.Notethatthe
fSUBclockcanbeenabledordisabledinthepowerdownmodebythefSUBclockcontrolbitFSUBC
intheCTRL0register.
LCD Driver Output
TheoutputstructureofthedeviceLCDdrivercanbe24×8to28×4.TheLCDdriverbiastypehas
RandCtype.TheC/RtypeandnumberofCOMandSEGisselectedbysoftwareoption.TheLCD
driverhasafixed1/3bias.
ThenatureofLiquidCrystalDisplaysrequirethatonlyACvoltagescanbeappliedtotheirpixels
astheapplicationofDCvoltagestoLCDpixelsmaycausepermanentdamage.Forthisreason
therelativecontrastofanLCDdisplayiscontrolledbytheactualRMSvoltageappliedtoeach
pixel,whichisequaltotheRMSvalueofthevoltageontheCOMpinminusthevoltageapplied
totheSEGpin.ThisdifferentialRMSvoltagemustbegreaterthantheLCDsaturationvoltage


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