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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCF8576DT/2 датащи(PDF) 13 Page - NXP Semiconductors |
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PCF8576DT/2 датащи(HTML) 13 Page - NXP Semiconductors |
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13 / 57 page  PCF8576D All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. Product data sheet Rev. 14 — 10 June 2013 13 of 57 NXP Semiconductors PCF8576D Universal LCD driver for low multiplex rates 7.4.2 1:2 Multiplex drive mode The 1:2 multiplex drive mode is used when two backplanes are provided in the LCD. This mode allows fractional LCD bias voltages of 1⁄2 bias or 1⁄3 bias as shown in Figure 8 and Figure 9. (1) Vstate1(t) = VSn(t) VBP0(t). (2) Von(RMS) = 0.791VLCD. (3) Vstate2(t) = VSn+1(t) VBP1(t). (4) Voff(RMS) = 0.354VLCD. Fig 8. Waveforms for the 1:2 multiplex drive mode with 1⁄2 bias mgl746 state 1 BP0 (a) Waveforms at driver. (b) Resultant waveforms at LCD segment. LCD segments state 2 BP1 state 2 state 1 VSS VLCD VLCD / 2 VSS VSS VLCD VLCD VSS VLCD VLCD VLCD 0 V 0 V VLCD / 2 VLCD / 2 VLCD / 2 −VLCD −VLCD −VLCD / 2 −VLCD / 2 Sn Sn+1 Tfr |
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