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PCF8532 Datasheet(PDF) 8 Page - NXP Semiconductors |
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PCF8532 Datasheet(HTML) 8 Page - NXP Semiconductors |
8 / 44 page PCF8532_1 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 1 — 10 February 2009 8 of 44 NXP Semiconductors PCF8532 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 4. Vstate1(t) = VSn(t) − VBP0(t). Von(RMS) = VLCD. Vstate2(t) = V(Sn+1)(t) − VBP0(t). Voff(RMS) = 0 V. Fig 4. 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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