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PCF8536AT1 Datasheet(PDF) 29 Page - NXP Semiconductors

Part # PCF8536AT1
Description  Universal LCD driver for low multiplex rates including a 6 channel PWM generator
PDF  74 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8536AT1 Datasheet(HTML) 29 Page - NXP Semiconductors

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PCF8536
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 21 February 2012
29 of 74
NXP Semiconductors
PCF8536
Universal LCD low multiplex driver with 6 channel PWM generator
8.5 LCD drive mode waveforms
8.5.1 1:4 Multiplex drive mode
When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies, as
shown in Figure 15. This drawing is also showing the case of line inversion (see
Section 8.1.4.2).
Vstate1(t) = VSn(t)  VBP0(t). Vstate2(t) = VSn(t)  VBP1(t).
Von(RMS)(t) = 0.577VLCD. Voff(RMS)(t) = 0.333VLCD.
Fig 15. Waveforms for the 1:4 multiplex drive mode with 1⁄3 bias and line inversion
013aaa211
state 1
BP0
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 1
state 2
BP2
(a) Waveforms at driver.
BP3
Sn
Sn+1
Sn+2
Sn+3
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
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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