PCA8534AH-Q900 NXP [NXP Semiconductors], PCA8534AH-Q900 Datasheet - Page 13
PCA8534AH-Q900
Manufacturer Part Number
PCA8534AH-Q900
Description
Universal LCD driver for low multiplex rates
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.PCA8534AH-Q900.pdf
(44 pages)
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NXP Semiconductors
PCA8534A_2
Product data sheet
7.4.4 1:4 Multiplex drive mode
When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies, as
shown in
Fig 8.
Sn+1
Sn+2
Sn+3
state 1
state 2
BP2
BP0
BP1
BP3
Sn
Figure
V
V
V
V
Waveforms for the 1:4 multiplex drive mode with
state1
on(RMS)
state2
off(RMS)
(t) = V
(t) = V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
−V
−2V
−V
V
2V
V
−V
−2V
−V
0 V
0 V
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
LCD
LCD
All information provided in this document is subject to legal disclaimers.
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
8.
= 0.577V
= 0.333V
LCD
LCD
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
Sn
Sn
/ 3
/ 3
(t) − V
(t) − V
Rev. 02 — 1 June 2010
LCD
LCD
BP0
BP1
.
.
(t).
(t).
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
Universal LCD driver for low multiplex rates
T
fr
1
⁄
3
bias
PCA8534A
state 1
state 2
mgl749
© NXP B.V. 2010. All rights reserved.
LCD segments
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