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| P83C434 Datasheet, PDF (23/36 Pages) NXP Semiconductors – 8-bit microcontrollers with LCD-driver | |||
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Philips Semiconductors
8-bit microcontrollers with LCD-driver
Product speciï¬cation
P83C434; P83C834
6.7.4.3 1 : 3 multiplex drive mode
When three backplanes are provided in the LCD, the 1 : 3 multiplex mode applies, as shown in Fig.15.
book, full pagewidth
BP0
BP1
BP2/S23
Sn
Sn+1
Sn+2
VDD(P)
VSS+2Vop/3
VSS+Vop/3
VSS
VDD(P)
VSS+2Vop/3
VSS+Vop/3
VSS
VDD(P)
VSS+2Vop/3
VSS+Vop/3
VSS
VDD(P)
VSS+2Vop/3
VSS+Vop/3
VSS
VDD(P)
VSS+2Vop/3
VSS+Vop/3
VSS
VDD(P)
VSS+2Vop/3
VSS+Vop/3
VSS
Vop
2Vop/3
Vop/3
state 1
0
âVop/3
â2Vop/3
âVop
Vop
2Vop/3
Vop/3
state 2
0
âVop/3
â2Vop/3
âVop
Tframe
LCD elements
state 1
state 2
(a) waveforms at driver
(b) resultant waveforms
at LCD element
Vstate1(t) = VSn(t) â VBP0(t)
Von(rms) = 0.638Vop
Vstate2(t) = VSn(t) â VBP0(t)
Voff(rms) = 0.333Vop
MGG017
1997 Jul 03
Fig.15 Waveforms for the 1 : 3 multiplex drive mode (Vop = VDD(P) â VSS).
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