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PCF8532 数据表(PDF) 8 Page - NXP Semiconductors

部件名 PCF8532
功能描述  Universal LCD driver for low multiplex rates
PDF  44 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCF8532 数据表(HTML) 8 Page - NXP Semiconductors

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PCF8532_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 1 — 10 February 2009
8 of 44
NXP Semiconductors
PCF8532
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 4.
Vstate1(t) = VSn(t) − VBP0(t).
Von(RMS) = VLCD.
Vstate2(t) = V(Sn+1)(t) − VBP0(t).
Voff(RMS) = 0 V.
Fig 4.
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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