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HT66F005 Datasheet(PDF) 74 Page - Holtek Semiconductor Inc

Part # HT66F005
Description  Cost-Effective A/D Flash MCU with EEPROM
PDF  109 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT66F005 Datasheet(HTML) 74 Page - Holtek Semiconductor Inc

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Rev. 1.30
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Rev. 1.30
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HT66F005/HT66F006
Cost-Effective A/D Flash MCU with EEPROM
HT66F005/HT66F006
Cost-Effective A/D Flash MCU with EEPROM
ADCR1 Register
Bit
7
6
5
4
3
2
1
0
Name
�CS4
V1�5EN
—
VREFS
—
�DCK�
�DCK1
�DCK0
R/W
R/W
R/W
—
R/W
—
R/W
R/W
R/W
POR
0
0
—
0
—
0
0
0
Bit7
ACS4:SelectInternal1.25VbandgapvoltageasADCinput
0:Disable
1:Enable
Thisbitenablesthe1.25VbandgapvoltagetobeconnectedtotheA/Dconverter.The
V125ENbitmustfirsthavebeensettoenablethebandgapcircuit1.25Vvoltagetobe
usedbytheA/Dconverter.WhentheACS4bitissethigh,thebandgap1.25Vvoltage
willberoutedtotheA/DconverterandtheotherA/Dinputchannelsdisconnected.
Bit6
V125EN:Internal1.25VControl
0:Disable
1:Enable
ThisbitcontrolstheinternalBandgapcircuiton/offfunctiontotheA/Dconverter.
Whenthebitissethighthebandgapvoltage1.25VcanbeusedasanA/Dconverter
input.Ifthebandgapvoltage1.25VisnotusedbytheA/DconverterandtheLVR/LVD
functionisdisabledthenthebandgapreferencecircuitwillbeautomaticallyswitched
offtoconservepower.When1.25VisswitchedonforusebytheA/Dconverter,atime
tBGshouldbeallowedforthebandgapcircuittostabilisebeforeimplementinganA/D
conversion.
Bit5
Unimplemented,readas"0"
Bit4
VREFS:SelectADCreferencevoltage
0:InternalADCpower
1:VREFpin
ThisbitisusedtoselectthereferencevoltagefortheA/Dconverter.Ifthebitishigh,
thentheA/DconverterreferencevoltageissuppliedontheexternalVREFpin.Ifthe
pinislow,thentheinternalreferenceisusedwhichistakenfromthepowersupplypin
VDD.
Bit3
Unimplemented,readas"0"
Bit2~0
ADCK2, ADCK1, ADCK0:SelectADCclocksource
000:fSYS
001:fSYS/2
010:fSYS/4
011:fSYS/8
100:fSYS/16
101:fSYS/32
110:fSYS/64
111:Undefined
ThesethreebitsareusedtoselecttheclocksourcefortheA/Dconverter.



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