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HT9B95 Datasheet(PDF) 17 Page - Holtek Semiconductor Inc

Part # HT9B95
Description  RAM Mapping 39횞8 / 43횞4 LCD Driver
PDF  32 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT9B95 Datasheet(HTML) 17 Page - Holtek Semiconductor Inc

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Rev. 1.10
17
November 25, 2015
HT9B95A/B/G
• Command Register Read Operation
Themasterreadsthecommandregisteraftersetting
theslaveaddress.FollowingtheR/Wbit(=”0”)isan
acknowledgebitandtheregisteraddressbytewhich
iswrittentotheinternaladdresspointer.Afterthestart
addressofthereadoperationhasbeenconfigured,
anotherSTARTconditionandtheslaveaddress
transferredonthebusfollowedbytheR/Wbit(=”1”).
ThentheMSBofthedatawhichwasaddressed
istransmittedfirstontheI2Cbus.TheCbitinthe
registeraddressbytecanbesetto“1”or“0”.
Allcommandsettingvaluesareputtogetherinto
twocommandregisterswiththeregisteraddresses
of 23H and 24H or 27H and 28H when the
CommandRegisterReadOperationisexecuted.
EachtimetheCommandRegisterReadOperation
isexecuted,onlyonecommandregistercanbe
read.Toreadallcommandregisters,executethe
CommandRegisterReadOperationtwicewiththe
registeraddressof23Hor27Hand24Hor28H
respectively.Thetwocommandregisterscontents
arearrangedinthefollowingtworegistersandthe
detaileddefinitionaredescribedinthe“Command
Summary”section.
Part No.
Command
Register 1 Address
Command
Register 2 Address
HT9B95A
23h
24h
HT9B95B
HT9B95G
27h
28h
Command Register Address
• Command Register 1
Bit
7
6
5
4
3
2
1
0
Name — DB SR LV4 LV3 LV2 LV1 LV0
Bit6
DB:DutyandBiassetting
Bit5
SR:SoftwareResetOperation
Bit4~0
LV4~LV0:LCDVoltageAdjustment
setting
• Command Register 2
Bit
7
6
5
4
3
2
1
0
Name FR1 FR0 PS1 PS0 W
D AP1 AP0
Bit7~6
FR1~FR0:FrameFrequencysetting
Bit5~4
PS1~PS0:PowerSaveModesetting
Bit3
W:LCDDriveWaveformsetting
Bit2
D:DisplayOn/Offsetting
Bit1~0
AP1~AP0:AllpixelsOn/Offsetting
ACK
P
Slave Address
S
0
1
1
1
1
1
0
0
Command Data byte
D7
D6
D5
D4
D3
D2
D1
D0
1st data
ACK
Device Address
S
0
1
1
1
1
1
0
1
ACK
Command Register Address
A0
A1
A2
A3
A4
A5
0
C
NACK
P
C bit
Write
W
R/
Read
W
R/
Command Register Read Operation



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