pcf8534 NXP Semiconductors, pcf8534 Datasheet - Page 10

• Manufacturer Part Number: pcf8534
• Description: Universal Driver Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF8534_0
Preliminary datasheet
6.4.2 1:2 Multiplex drive mode
When two backplanes are provided in the LCD, the 1:2 multiplex mode applies. The
PCF8534 allows the use of
Figure
Fig 5. Waveforms for the 1:2 multiplex drive mode with
6.
V
V
V
V
state1
ON(rms)
state2
OFF(rms)
(t) = V
(t) = V
S
state 1
state 2
n+1
BP0
BP1
S
= 0.791 V
= 0.354 V
n
sn
(sn)
(t) − V
Rev. 00.05 — 20 February 2007
(t) − V
V
V
V
V
V
V
V
−V
−V
V
−V
−V
V
V
V
V
V
V
SS
SS
SS
SS
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
0 V
0 V
LCD
LCD
LCD
LCD
LCD
LCD
BP0
/2
/2
/2
/2
BP1
/2
/2
.
.
(t).
1
(t).
⁄
2
bias or
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.
T
frame
1
⁄
2
bias.
state 1
state 2
mgl746
LCD segments
PCF8534
© NXP B.V. 2007. All rights reserved.
Figure 5
and
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