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PCA85162 Datasheet(PDF) 13 Page - NXP Semiconductors

Part # PCA85162
Description  Universal LCD driver for low multiplex rates
PDF  46 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA85162 Datasheet(HTML) 13 Page - NXP Semiconductors

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PCA85162
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 16 June 2011
13 of 46
NXP Semiconductors
PCA85162
Universal LCD driver for low multiplex rates
7.4.3 1:3 Multiplex drive mode
When three backplanes are provided in the LCD, the 1:3 multiplex drive mode applies, as
shown in Figure 9.
Vstate1(t) = VSn(t)  VBP0(t).
Von(RMS) = 0.638VLCD.
Vstate2(t) = VSn(t)  VBP1(t).
Voff(RMS) = 0.333VLCD.
Fig 9.
Waveforms for the 1:3 multiplex drive mode with 1⁄3 bias
013aaa210
state 1
BP0
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 1
state 2
(a) Waveforms at driver.
BP2
Sn
Sn+1
Sn+2
Tfr
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
0 V
VLCD
2VLCD/3
−2VLCD/3
VLCD/3
−VLCD/3
−VLCD
0 V
VLCD
2VLCD/3
−2VLCD/3
VLCD/3
−VLCD/3
−VLCD
VSS
VLCD
2VLCD/3
VLCD/3



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