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PCF8534AHL/1 Folha de dados(PDF) 11 Page - NXP Semiconductors

Nome de Peças PCF8534AHL/1
Descrição Electrónicos  Universal LCD driver for low multiplex rates
PDF  47 Pages
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Fabricante Electrônico  NXP [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8534AHL/1 Folha de dados(HTML) 11 Page - NXP Semiconductors

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PCF8534A_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 6 August 2009
11 of 47
NXP Semiconductors
PCF8534A
Universal LCD driver for low multiplex rates
7.4 LCD drive mode waveforms
7.4.1 Static drive mode
The static LCD drive mode is used when a single backplane is provided in the LCD.
Backplane and segment drive waveforms for this mode are shown in Figure 6.
Vstate1(t) = VSn(t) − VBP0(t).
Von(RMS) = VLCD.
Vstate2(t) = V(Sn + 1)(t) − VBP0(t).
Voff(RMS) = 0 V.
Fig 6.
Static drive mode waveforms
mgl745
VSS
VLCD
VSS
VLCD
VSS
VLCD
VLCD
−VLCD
−VLCD
VLCD
state 1
0 V
BP0
Sn
Sn+1
state 2
0 V
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
LCD segments
state 1
(on)
state 2
(off)
Tfr



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