NXP Semiconductors
PCF8536
Universal LCD low multiplex driver with 6 channel PWM generator
8.5.3 1:8 Multiplex drive mode
BP0
VLCD
3VLCD / 4
VLCD / 4
VSS
BP1
VLCD
3VLCD / 4
VLCD / 4
VSS
BP2
VLCD
3VLCD / 4
VLCD / 4
VSS
BP3
VLCD
3VLCD / 4
VLCD / 4
VSS
BP4
VLCD
3VLCD / 4
3LCD / 4
VSS
BP5
VLCD
3VLCD / 4
VLCD / 4
VSS
BP6
VLCD
3VLCD / 4
VLCD / 4
VSS
BP7
VLCD
3VLCD / 4
VLCD / 4
VSS
VLCD
Sn VLCD / 2
VSS
VLCD
Sn + 1 VLCD / 2
VSS
VLCD
3VLCD / 4
state 1
VLCD / 4
VSS
-VLCD / 4
-3VLCD / 4
-VLCD
state 2
VLCD
3VLCD / 4
VLCD / 2
VLCD / 4
VSS
-VLCD / 4
-VLCD / 2
-3VLCD / 4
-VLCD
Tfr
LCD segments
state 1
state 2
(a) Waveforms at driver
(b) Resultant waveforms at LCD segment
001aal398
Vstate1(t) = VSn(t) VBP0(t). Vstate2(t) = VSn + 1(t) VBP0(t). Von(RMS)(t) = 0.424VLCD. Voff(RMS)(t) = 0.293VLCD.
Fig 18. Waveforms for 1:8 multiplex drive mode with bias 1⁄4 and line inversion
PCF8536
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 6 October 2011
© NXP B.V. 2011. All rights reserved.
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