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PCF8811U/2DA/1 数据表(PDF) 55 Page - NXP Semiconductors |
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PCF8811U/2DA/1 数据表(HTML) 55 Page - NXP Semiconductors |
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55 / 81 page  PCF8811_4 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 — 27 June 2008 55 of 81 NXP Semiconductors PCF8811 80 x 128 pixels matrix LCD driver You can calculate the VLCD at a specific temperature for both command sets. VLCD (atT= TCUT) is given by Equation 4 or Equation 5 depending on the command set which is used. (6) In the extended command set and basic command set 8 different temperature coefficients are available; see Figure 37. The typical values of the different temperature coefficients are given in Section 15. The coefficients are proportional to the programmed VLCD. The basic and extended command set differ in the way that the temperature coefficients can be accessed. In the basic command set only one temperature coefficient is available. However, the possibility exists to program the default temperature coefficient by means of OTP programming; see Section 18. In the extended command set the different temperature coefficients are selected by the interface with three bits TC[2:0]. Fig 37. Temperature coefficients V LCD T () V LCD T T CUT = () 1T T CUT – () TC × + [] × = mgw754 VLCD TCUT T |
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