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HT46R002 数据表(PDF) 50 Page - Holtek Semiconductor Inc

部件名 HT46R002
功能描述  Cost-Effective A/D 8-Bit OTP MCU
Download  83 Pages
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制造商  HOLTEK [Holtek Semiconductor Inc]
网页  http://www.holtek.com
标志 HOLTEK - Holtek Semiconductor Inc

HT46R002 数据表(HTML) 50 Page - Holtek Semiconductor Inc

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Rev. 1.21
50
April 11, 2017
Rev. 1.21
51
April 11, 2017
HT46R002/HT46R003
Cost-Effective A/D 8-Bit OTP MCU
HT46R002/HT46R003
Cost-Effective A/D 8-Bit OTP MCU
Analog to Digital Converter
Theneedtointerfacetorealworldanalogsignalsisacommonrequirementformanyelectronic
systems.However,toproperlyprocessthesesignalsbyamicrocontroller,theymustfirstbe
convertedintodigitalsignalsbyA/Dconverters.ByintegratingtheA/Dconversionelectronic
circuitryintothemicrocontroller,theneedforexternalcomponentsisreducedsignificantlywiththe
correspondingfollow-onbenefitsoflowercostsandreducedcomponentspacerequirements.
A/D Overview
Thedevicescontaina4-channelanalogtodigitalconverterwhichcandirectlyinterfacetoexternal
analogsignals,suchasthatfromsensorsorothercontrolsignalsandconvertthesesignalsdirectly
intoeithera12-bitdigitalvalue.
TheaccompanyingblockdiagramshowstheoverallinternalstructureoftheA/Dconverter,together
withitsassociatedregisters.
¸ 2
(n =0 ~5 )
AC SR R egi st er
AD C
AD RL
AD RH
A/ D Da ta
R egi st er s
PC R0 ~P CR 3
AC S0 ~A CS 1
ST AR T EO CB
AD CR
R egi st er
Pi n Co nf i gur at io n
Bi ts
C hannel S el ec t
Bi ts
St ar t Bi t E nd o f
Co nv er si on Bi t
AD ON B Bi t
A/ D En abl e
f SY S
PA 0/ AN 0
PA 1/ AN 1
PA 2/ AN 2
PA 5/ AN 3
V DD
AD ON B it
N
A/D Converter Structure
A/D Converter Data Registers – ADRL, ADRH
Thedevices,whichhaveaninternal12-bitA/Dconverter,requiretwodataregisters,ahighbyte
register,knownasADRH,andalowbyteregister,knownasADRL.Aftertheconversionprocess
takesplace,theseregisterscanbedirectlyreadbythemicrocontrollertoobtainthedigitised
conversionvalue.Onlythehighbyteregister,ADRH,utilisesitsfull8-bitcontents.Thelow
byteregisterutilisesonly4bitofits8-bitcontentsasitcontainsonlythelowestbitsofthe12-bit
convertedvalue.
Inthefollowingtable,D0~D11istheA/Dconversiondataresultbits.
ADRH, ADRL Register
Bit
ADRH
ADRL
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Name D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
R/W
R
R
R
R
R
R
R
R
R
R
R
R
POR
X
X
X
X
X
X
X
X
X
X
X
X
“x” unknown
Unimplemented,readas“0”
D11~D0:ADCconversiondata


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