pcf8536 NXP Semiconductors, pcf8536 Datasheet - Page 29

• Manufacturer Part Number: pcf8536
• Description: Universal Lcd Driver For Low Multiplex Rates Including A 6 Channel Pwm Generator
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF8536
Product data sheet
8.5.1 1:4 Multiplex drive mode
8.5 LCD drive mode waveforms
When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies, as
shown in
Section
Fig 15. Waveforms for the 1:4 multiplex drive mode with
Sn+1
Sn+2
Sn+3
state 1
state 2
BP2
BP0
BP1
BP3
Sn
8.1.4.2).
Figure
V
V
state1
on(RMS)
(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
All information provided in this document is subject to legal disclaimers.
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
(t) = 0.577V
LCD
LCD
LCD
LCD
15. This drawing is also showing the case of line inversion (see
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Universal LCD low multiplex driver with 6 channel PWM generator
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
Sn
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
(t)  V
Rev. 1 — 6 October 2011
LCD
BP0
. V
(t). V
off(RMS)
state2
(t) = 0.333V
(t) = V
(b) Resultant waveforms
(a) Waveforms at driver.
at LCD segment.
Sn
(t)  V
T
fr
LCD
BP1
.
(t).
1
⁄
3
bias and line inversion
state 1
state 2
013aaa211
PCF8536
© NXP B.V. 2011. All rights reserved.
LCD segments
29 of 74