PCA9620H NXP [NXP Semiconductors], PCA9620H Datasheet - Page 24

• Manufacturer Part Number: PCA9620H
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA9620
Product data sheet
7.4.2.2 1:2 Multiplex drive mode
When two backplanes are provided in the LCD, the 1:2 multiplex mode applies. The
PCA9620 allows the use of
Figure
Fig 16. Waveforms for the 1:2 multiplex drive mode with
17.
V
V
V
state1
state2
on(RMS)
state 1
state 2
Sn+1
(t) = V
(t) = V
BP0
BP1
All information provided in this document is subject to legal disclaimers.
Sn
(t) = 0.791V
Sn
Sn
(t) − V
(t) − V
Rev. 1 — 9 December 2010
V
V
V
V
V
V
V
V
V
V
V
V
− V
− V
V
V
− V
− V
0 V
0 V
LCD
LCD
SS
LCD
LCD
SS
LCD
SS
LCD
SS
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
BP0
BP1
/2
/2
/2
/2
/2
/2
1
. V
(t).
(t).
⁄
2
off(RMS)
bias or
(t) = 0.354V
1
⁄
3
(a) Waveforms at driver.
(b) Resultant waveforms
bias in this mode as shown in
Universal LCD driver for low multiplex rates
at LCD segment.
LCD
.
T
fr
1
⁄
2
bias (line inversion mode)
013aaa208
state 1
state 2
LCD segments
PCA9620
© NXP B.V. 2010. All rights reserved.
Figure 16
and
24 of 71