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PCF8534AHL/1 Scheda tecnica(PDF) 11 Page - NXP Semiconductors |
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PCF8534AHL/1 Scheda tecnica(HTML) 11 Page - NXP Semiconductors |
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11 / 47 page  PCF8534A_5 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 — 6 August 2009 11 of 47 NXP Semiconductors PCF8534A 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 6. Vstate1(t) = VSn(t) − VBP0(t). Von(RMS) = VLCD. Vstate2(t) = V(Sn + 1)(t) − VBP0(t). Voff(RMS) = 0 V. Fig 6. Static drive mode waveforms mgl745 VSS VLCD VSS VLCD VSS VLCD VLCD −VLCD −VLCD VLCD 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) Tfr |
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