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PCF8566T/1,118

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48
PCF8566_7 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 07 — 25 February 2009 10 of 48
NXP Semiconductors
PCF8566
Universal LCD driver for low multiplex rates
7.4 LCD drive mode waveforms
7.4.1 Static drive mode
The static LCD drive mode is used when a single backplane is provided in the LCD.
Backplane and segment drive waveforms for this mode are shown in Figure 5.
V
state1
(t) = V
Sn
(t) − V
BP0
(t).
V
on(RMS)
= V
LCD
.
V
state2
(t) = V
Sn+1
(t) − V
BP0
(t).
V
off(RMS)
= 0 V.
Fig 5. Static drive mode waveforms
mgl745
V
SS
V
LCD
V
SS
V
LCD
V
SS
V
LCD
V
LCD
−V
LCD
−V
LCD
V
LCD
state 1 0 V
BP0
Sn
Sn+1
state 2 0 V
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
LCD segments
state 1
(on)
state 2
(off)
T
fr
PCF8566_7 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 07 — 25 February 2009 11 of 48
NXP Semiconductors
PCF8566
Universal LCD driver for low multiplex rates
7.4.2 1:2 Multiplex drive mode
When two backplanes are provided in the LCD, the 1:2 multiplex mode applies. The
PCF8566 allows the use of
1
⁄
2
bias or
1
⁄
3
bias (see Figure 6 and Figure 7).
V
state1
(t) = V
Sn
(t) − V
BP0
(t).
V
on(RMS)
= 0.791V
LCD
.
V
state2
(t) = V
Sn
(t) − V
BP1
(t).
V
off(RMS)
= 0.354V
LCD
Fig 6. Waveforms for the 1:2 multiplex drive mode with
1
⁄
2
bias
mgl746
state 1
BP0
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 2
state 1
V
SS
V
LCD
V
LCD
/ 2
V
SS
V
SS
V
LCD
V
LCD
V
SS
V
LCD
V
LCD
V
LCD
0 V
0 V
V
LCD
/ 2
V
LCD
/ 2
V
LCD
/ 2
−V
LCD
−V
LCD
−V
LCD
/ 2
−V
LCD
/ 2
S
n
Sn+1
T
fr
PCF8566_7 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 07 — 25 February 2009 12 of 48
NXP Semiconductors
PCF8566
Universal LCD driver for low multiplex rates
V
state1
(t) = V
Sn
(t) − V
BP0
(t).
V
on(RMS)
= 0.745V
LCD
V
state2
(t) = V
Sn
(t) − V
BP1
(t)
V
off(RMS)
= 0.333V
LCD.
Fig 7. Waveforms for the 1:2 multiplex drive mode with
1
⁄
3
bias
mgl747
state 1
BP0
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 1
state 2
V
SS
V
LCD
2V
LCD
/ 3
V
LCD
/ 3
V
SS
V
LCD
2V
LCD
/ 3
V
LCD
/ 3
V
SS
V
LCD
2V
LCD
/ 3
V
LCD
/ 3
0 V
V
LCD
2V
LCD
/ 3
−2V
LCD
/ 3
V
LCD
/ 3
−V
LCD
/ 3
−V
LCD
−V
LCD
0 V
V
LCD
2V
LCD
/ 3
−2V
LCD
/ 3
V
LCD
/ 3
−V
LCD
/ 3
S
n
Sn+1
T
fr
V
SS
V
LCD
2V
LCD
/ 3
V
LCD
/ 3
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PCF8566T/1,118

Mfr. #:
Buy PCF8566T/1,118
Manufacturer:
NXP Semiconductors
Description:
LCD Drivers LCD DVR UNVRSL LOW-MUX
Lifecycle:
New from this manufacturer.
Delivery:
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