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PCA9620 Datasheet(PDF) 29 Page - NXP Semiconductors |
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PCA9620 Datasheet(HTML) 29 Page - NXP Semiconductors |
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29 / 71 page  PCA9620 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 1 — 9 December 2010 29 of 71 NXP Semiconductors PCA9620 Universal LCD driver for low multiplex rates 7.4.2.5 1:8 Multiplex drive mode Vstate1(t) = VSn(t) − VBP0(t). Vstate2(t) = VSn(t) − VBP1(t). Von(RMS)(t) = 0.424VLCD. Voff(RMS)(t) = 0.293VLCD. Fig 21. Waveforms for 1:8 multiplex drive mode with 1 ⁄ 4 bias (line inversion mode) 001aal398 BP0 BP1 BP2 BP3 BP4 BP5 BP6 BP7 Sn Sn + 1 state 1 state 2 VLCD 3VLCD / 4 state 1 Tfr state 2 LCD segments −VLCD VLCD / 2 VLCD / 4 VSS −VLCD / 4 −VLCD / 2 −3VLCD / 4 −VLCD −3VLCD / 4 −VLCD / 4 VSS VLCD / 4 3VLCD / 4 VLCD VSS VLCD / 2 VLCD VSS VLCD / 2 VLCD VSS VLCD / 4 3VLCD / 4 VLCD VSS VLCD / 4 3VLCD / 4 VLCD VSS VLCD / 4 3VLCD / 4 VLCD VSS 3LCD / 4 3VLCD / 4 VLCD VSS VLCD / 4 3VLCD / 4 VLCD VSS VLCD / 4 3VLCD / 4 VLCD VSS VLCD / 4 3VLCD / 4 VLCD VSS VLCD / 4 3VLCD / 4 VLCD |
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