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HT67F5652 Datasheet(PDF) 31 Page - Holtek Semiconductor Inc

Part # HT67F5652
Description  24-Bit Delta Sigma A/D LCD Flash MCU
PDF  224 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT67F5652 Datasheet(HTML) 31 Page - Holtek Semiconductor Inc

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Rev. 1.00
30
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Rev. 1.00
31
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HT67F5652
24-Bit Delta Sigma A/D + LCD Flash MCU
HT67F5652
24-Bit Delta Sigma A/D + LCD Flash MCU
• FD3L Register
Bit
7
6
5
4
3
2
1
0
Na�e
D�
D�
D5
D4
D3
D�
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
Bit7~0
ThefourthFlashMemorydata[7:0]
• FD3H Register
Bit
7
6
5
4
3
2
1
0
Na�e
D15
D14
D13
D1�
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]
Flash Memory Write Function Enable Procedure
InordertoallowuserstochangetheFlashmemorydatathroughtheIAPcontrolregisters,users
mustfirstenabletheFlashmemorywriteoperationbythefollowingprocedure:
Step1.Write"110"intotheFMOD2~FMOD0bitstoselecttheFWENmode.
Step2.SettheFWPENbitto"1".Thestep1andstep2canbeexecutedsimultaneously.
Step3.Thepatterndatawithasequenceof00H,04H,0DH,09H,C3Hand40Hmustbewritten
intotheFD1L,FD1H,FD2L,FD2H,FD3LandFD3Hregistersrespectively.
Step4.Acounterwithatime-outperiodof300μswillbeactivatedtoallowuserswritingthecorrect
patterndataintotheFD1L/FD1H~FD3L/FD3Hregisterpairs.Thecounterclockisderived
fromLIRCoscillator.
Step5.Ifthecounteroverflowsorthepatterndataisincorrect,theFlashmemorywriteoperation
willnotbeenabledandusersmustagainrepeattheaboveprocedure.ThentheFWPENbit
willautomaticallybeclearedto0byhardware.
Step6.Ifthepatterndataiscorrectbeforethecounteroverflows,theFlashmemorywriteoperation
willbeenabledandtheFWPENbitwillautomaticallybeclearedto0byhardware.The
CFWENbitwillalsobesetto1byhardwaretoindicatethattheFlashmemorywrite
operationissuccessfullyenabled.
Step7.OncetheFlashmemorywriteoperationisenabled,theusercanchangetheFlashROMdata
throughtheFlashcontrolregister.
Step8.TodisabletheFlashmemorywriteoperation,theusercancleartheCFWENbitto0.



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