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HT45R2K-C Folha de dados(PDF) 70 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) 70 Page - Holtek Semiconductor Inc

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Rev. 1.40
70
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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
bit4~2
IAD2~IAD1:ChopperClockSelect
IAchopperclockdefinedas:
000:clock=(fSYS/32)/1
001:clock=(fSYS/32)/2
010:clock=(fSYS/32)/4
011:clock=(fSYS/32)/8
100:clock=(fSYS/32)/16
101:clock=(fSYS/32)/32
110:clock=(fSYS/32)/64
111:clock=(fSYS/32)/128
Asuggestedclockspeedhasarangeofaround8-10kHz.NotethatCHOPENmustbe
enabled–heretheIAchopperclockisapproximate8k~10k.(7.8125k~11.71875k)
andtheADCchopperclockmustbe<8k.
bit1
Unimplemented,readas"0"
bit0
RSEN:OP5external/internalgainsetupcontrolbit
0:Openloopsetup–gaindefinedbyexternalreisistors.
1:Closedloopsetup–gaindefinedbyG10,G11andG12bitsintheIAC0register.
IADAC Register
Bit
7
6
5
4
3
2
1
0
Name
IADAEN
D�
D4
D3
D�
D1
D0
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
IADAEN:IADACenable/disable
0:disable
1:enable
bit6
Unimplemented,readas"0"
bit5~0
D5~D0:DACOutputVoltageSetupBits
Note:TheDACoutputrangeis0V~{VOREG-(VOREG/64)}
1LSB=1digitalcode=VOREG/64
OutputVoltage=VOREG/64*(D[5:0])
Interrupts
Interruptsareanimportantpartofanymicrocontrollersystem.Whenanexternaleventoraninternal
functionsuchasaTimer/EventCounteroranA/Dconverterrequiresmicrocontrollerattention,
theircorrespondinginterruptwillenforceatemporarysuspensionofthemainprogramallowingthe
microcontrollertodirectattentiontotheirrespectiveneeds.
Thedeviceprovidesanexternalinterruptandmultipleinternalinterrupts.Theexternalinterruptis
controlledbytheactionoftheexternalinterruptpin,whiletheinternalinterruptsarecontrolledby
theTimer/EventCounters,TouchKeyandA/Dconverter.
Interrupt Register
Overallinterruptcontrol,whichmeansinterruptenablingandrequestflagsetting,iscontrolledby
usingthreeregisters,INTC0,INTC1andMFIC.Bycontrollingtheappropriateenablebitsinthis
registerseachindividualinterruptcanbeenabledordisabled.Alsowhenaninterruptoccurs,the
correspondingrequestflagwillbesetbythemicrocontroller.Theglobalenableflagifclearedto
zerowilldisableallinterrupts.


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