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HT45F39 Datasheet(PDF) 23 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) 23 Page - Holtek Semiconductor Inc

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Rev. 1.10
22
July 01, 2016
Rev. 1.10
23
July 01, 2016
HT45F39/HT45F391
Ultrasonic Distance Measurement 8-bit Flash MCU
HT45F39/HT45F391
Ultrasonic Distance Measurement 8-bit Flash MCU
• FD3H Register
Bit
7
6
5
4
3
2
1
0
Name
D15
D14
D13
D12
D11
D10
D9
D8
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
Bit7~0
ThefourthFlashMemorydata[15:8]
• FC0 Register
Bit
7
6
5
4
3
2
1
0
Name
CFWEN
FMOD2
FMOD1
FMOD0
FWPEN
FWT
FRDEN
FRD
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
1
1
1
0
0
0
0
Bit7
CFWEN:FlashROMWritecontrolbit
0:Disable
1:Enable
Whenthisbitisclearedto0byapplicationprogram,theFlashmemorywritefunction
isdisabled.Notethatwritinga"1"intothisbitresultsinnoaction.Thisbitisused
toindicatethattheFlashmemorywritefunctionstatus.Whenthisbitissetto1by
hardware,itmeansthattheFlashmemorywritefunctionisenabledsuccessfully.
Otherwise,theFlashmemorywritefunctionisdisabledasthebitcontentiszero.
Bit6~4
FMOD2~FMOD0:FlashProgrammemoryoperatingmodecontrolbits
000:writememorymode
001:Pageerasemode
010:Reserved
011Readmemorymode
100:Reserved
101:Reserved
110:FWENmode-Flashmemorywritefunctionenablemode
111:Reserved
Bit3
FWPEN:FlashmemoryWriteprocedureenablecontrol
0:Disable
1:Enable
Whenthisbitissetto1andtheFMODfieldissetto"110",theIAPcontrollerwill
executethe"Flashmemorywritefunctionenable"procedure.OncetheFlashmemory
writefunctionissuccessfullyenabled,itisnotnecessarytosettheFWPENbitany
more.
Bit2
FWT:FlashmemoryWriteControl
0:Writecyclehasfinished
1:Activateawritecycle
ThisbitissetbysoftwaretoactivateawriteFlashmemorycycleandclearedby
hardwarewhentheFlashmemorywriteprocessiscompleted.
Bit1
FRDEN:FlashMemoryReadEnable
0:Disable
1:Enable
ThisisbitmustbesethighbeforeaFlashmemoryreadoperationiscarriedout.
ClearingthisbittozerowillinhibitFlashmemoryreadoperations.
Bit0
FRD:FlashmemoryReadControl
0:Readcyclehasfinished
1:Activateareadcycle
ThisbitissetbysoftwaretoactivateareadFlashmemorycycleandclearedby
hardwarewhentheFlashmemoryreadprocessiscompleted.
Note:TheFWT,FRDENandFRDregisterscannotbesetto"1"atthesametimewith
asingleinstruction.



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