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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCF8534H датащи(PDF) 13 Page - NXP Semiconductors |
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PCF8534H датащи(HTML) 13 Page - NXP Semiconductors |
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13 / 40 page  PCF8534_0 © NXP B.V. 2007. All rights reserved. Preliminary datasheet Rev. 00.05 — 20 February 2007 13 of 40 NXP Semiconductors PCF8534 Universal LCD driver for low multiplex rates 6.4.4 1:4 Multiplex drive mode When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies, as shown in Figure 8. Vstate1(t) = Vsn(t) − VBP0(t). VON(rms) = 0.577 VLCD. Vstate2(t) = V(sn)(t) − VBP1(t). VOFF(rms) = 0.333 VLCD. Fig 8. Waveforms for the 1:4 multiplex drive mode. mgl749 state 1 BP0 (b) Resultant waveforms at LCD segment. LCD segments state 2 BP1 state 1 state 2 BP2 (a) Waveforms at driver. BP3 Sn Sn+1 Sn+2 Sn+3 Tframe VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 0 V VLCD 2VLCD/3 −2VLCD/3 VLCD/3 −VLCD/3 −VLCD 0 V VLCD 2VLCD/3 −2VLCD/3 VLCD/3 −VLCD/3 −VLCD VSS VLCD 2VLCD/3 VLCD/3 |
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