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HT45F39 Datasheet(PDF) 69 Page - Holtek Semiconductor Inc

Part # HT45F39
Description  Ultrasonic Distance Measurement 8-bit Flash MCU
PDF  102 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F39 Datasheet(HTML) 69 Page - Holtek Semiconductor Inc

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Rev. 1.10
68
July 01, 2016
Rev. 1.10
69
July 01, 2016
HT45F39/HT45F391
Ultrasonic Distance Measurement 8-bit Flash MCU
HT45F39/HT45F391
Ultrasonic Distance Measurement 8-bit Flash MCU
Register
Name
Bit
7
6
5
4
3
2
1
0
DVCM
D7
D6
D5
D4
D3
D2
D1
D0
SUMCMP
D7
D6
D5
D4
D3
D2
D1
D0
ENVCMP
EADADJ1 EADADJ0
—
—
CMPOUT ENVEDGE1 ENVEDGE0
—
AVPCTRL
Dn
Kn
—
SUMSEL
—
AEVMOD
—
SAVP
FIFOOUT
D7
D6
D5
D4
D3
D2
D1
D0
FIFOIN
D7
D6
D5
D4
D3
D2
D1
D0
FIFOWR_
ADDR
—
—
—
FWR4
FWR3
FWR2
FWR1
FWR0
FIFORD_
ADDR
—
—
—
FRD4
FRD3
FRD2
FRD1
FRD0
FIFOCTRL
—
—
—
—
Empty
Full
FRESET
FSTART
DVCM Register
BIT
7
6
5
4
3
2
1
0
NAME
D7
D6
D5
D4
D3
D2
D1
D0
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
TheVCMvoltageisimplementedbyaninternalhardwarecircuitandwhosevalueisaround1/2
VDD,ItisusedtoprovidetheinternalOPAreferencevoltage.ThedesignerhastoconverttheVCM
voltageintoadigitalvalueusingtheADCconverterandplaceitintheDVCMregister.TheADC
channelhastobesetuptobetheACMinputusingtheACS3~ACS0bitsintheADCR0register.
WhentheACS3~ACS0bitsaresetto"1001’,theADCchannelwillselecttheVCMinput.The
DVCMregister,whichistheADCconvertedVCMdataisusedtoprovidetheinputsignalforthe
Rectifiertoimplementafullwaverectifiedfunction.
SUMCMP Register - SUM Compare value
BIT
7
6
5
4
3
2
1
0
NAME
D7
D6
D5
D4
D3
D2
D1
D0
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
TheSUMCMPregisterisusedtosetuptheComparatorValuefortheComparatorinputdata.When
theAEVMODbitintheAVPCTRLregisteris"0",thevalueintheSUMCMPregisterwillbe
selectedtobetheComparatorinput,namelytheComparatorValue.
ENVCMP register
TheENVCMPregisterisusedtoadjusttheAuto-EnvelopADCsamplephase,tosetupthe
ComparatortriggeredgeandtoindicatetheComparatoroutput.TheADCsampledelaytimeis
selectedbytheEADADJ1andEADADJ0bits.TherearefouroptionsfortheADCconversiondelay
timeaftertheSTARTsignal.TheCMPOUTbitisusedtoindicatetheComparatoroutput.Whenthe
inputdata,namelySUM,islessthantheComparatorValue,theCMPOUTbitwillbe"0",otherwise,
thisbitwillbesetto‘1".Theusercanselectthecomparatorinterrupttriggeredgetype,rising,
fallingordualedge,usingtheENVEDGE1andENVEDGE0bits.



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