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HT16L21 Datasheet(PDF) 14 Page - Holtek Semiconductor Inc

Part # HT16L21
Description  RAM Mapping 32x4 LCD Driver
PDF  36 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT16L21 Datasheet(HTML) 14 Page - Holtek Semiconductor Inc

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Rev. 1.00
14
November 16, 2011
HT16L21
LCD Drive Mode Waveforms
• WhentheLCDdrivemodeisselectedas1/4dutyand1/2bias,thewaveformandLCDdisplayisshownas
follows:
SEG n+2
SEG n+2
VLCD
VLCD
VSS
VSS
SEG n
SEG n
COM0
COM0
COM1
COM1
COM2
COM2
SEG n+3
SEG n+3
COM3
COM3
SEG n+1
SEG n+1
(VLCD+VSS)/2
(VLCD+VSS)/2
VLCD
VLCD
VSS
VSS
(VLCD+VSS)/2
(VLCD+VSS)/2
VLCD
VLCD
VSS
VSS
(VLCD+VSS)/2
(VLCD+VSS)/2
VLCD
VLCD
VSS
VSS
(VLCD+VSS)/2
(VLCD+VSS)/2
VLCD
VLCD
VSS
VSS
(VLCD+VSS)/2
(VLCD+VSS)/2
VLCD
VLCD
VSS
VSS
(VLCD+VSS)/2
(VLCD+VSS)/2
VLCD
VLCD
VSS
VSS
(VLCD+VSS)/2
(VLCD+VSS)/2
VLCD
VLCD
VSS
VSS
(VLCD+VSS)/2
(VLCD+VSS)/2
State1
(on)
State1
(on)
State2
(off)
State2
(off)
LCD segment
LCD segment
tLCD
Waveforms for 1/4 duty drive mode with1/2 bias (VOP=VLCD−VSS)
Note:tLCD=1/fLCD



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