pcf8532 NXP Semiconductors, pcf8532 Datasheet - Page 12
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pcf8532
Manufacturer Part Number
pcf8532
Description
Universal Lcd Driver For Low Multiplex Rates
Manufacturer
NXP Semiconductors
Datasheet
1.PCF8532.pdf
(44 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
pcf8532U/2DA/1
Manufacturer:
NXP/恩智浦
Quantity:
20 000
NXP Semiconductors
PCF8532_1
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
0 V
0 V
V
2V
V
V
2V
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
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)
(t)
Rev. 1 — 10 February 2009
LCD
LCD
V
V
BP0
BP1
.
.
(t).
(t).
(b) Resultant waveforms
(a) Waveforms at driver.
at LCD segment.
Universal LCD driver for low multiplex rates
T
fr
1
3
bias
state 1
state 2
mgl749
PCF8532
© NXP B.V. 2009. All rights reserved.
LCD segments
12 of 44