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PCF8566P 数据表(PDF) 13 Page - NXP Semiconductors

部件名 PCF8566P
功能描述  Universal LCD driver for low multiplex rates
PDF  48 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCF8566P 数据表(HTML) 13 Page - NXP Semiconductors

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PCF8566_7
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 07 — 25 February 2009
13 of 48
NXP Semiconductors
PCF8566
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 8.
Vstate1(t) = VSn(t) − VBP0(t).
Von(RMS) = 0.638VLCD.
Vstate2(t) = VSn(t) − VBP1(t).
Voff(RMS) = 0.333VLCD.
Fig 8.
Waveforms for the 1:3 multiplex drive mode with 1
⁄
3 bias
mgl748
state 1
BP0
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 1
state 2
(a) Waveforms at driver.
BP2
S
n
S
n+1
S
n+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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