PCF8533 Просмотр технического описания (PDF) - Philips Electronics
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PCF8533 Datasheet PDF : 36 Pages
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Philips Semiconductors
Universal LCD driver for low multiplex rates
Product specification
PCF8533
handbook, full pagewidth
BP0
BP1
BP2
Sn
Sn + 1
Sn + 2
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
state 1
VLCD
2VLCD/3
VLCD/3
0V
−VLCD/3
−2VLCD/3
−VLCD
state 2
VLCD
2VLCD/3
VLCD/3
0V
−VLCD/3
−2VLCD/3
−VLCD
Tframe
LCD segments
state 1
state 2
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
MGL748
Vstate1(t) = Vsn(t) − VBP0(t).
Von(rms) = 0.638VLCD.
Vstate2(t) = Vsn(t) − VBP1(t).
Voff(rms) = 0.333VLCD.
Fig.6 Waveforms for the 1 : 3 multiplex drive mode.
6.4.4 1 : 4 MULTIPLEX DRIVE MODE
When four backplanes are provided in the LCD, the 1 : 4 multiplex drive mode applies, as shown in Fig.7.
1999 Jul 30
11
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