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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCF8833U/2DA датащи(PDF) 33 Page - NXP Semiconductors |
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PCF8833U/2DA датащи(HTML) 33 Page - NXP Semiconductors |
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33 / 112 page  2003 Feb 14 33 Philips Semiconductors Objective specification STN RGB - 132 × 132 × 3 driver PCF8833 6.2.24 VERTICAL SCROLLING DEFINITION In the PCF8833 three different scrolling modes can be used. These scrolling modes differ from each other in the way the RAM to display mapping is done. The vertical scrolling is defined as follows: • Vertical scrolling definition (VSCRDEF) command • TF[7:0] defines the number of lines for the top fixed area on the display, there is no top fixed area when TF[7:0] = 0 • SA[7:0] defines the number of lines for the scrolling area on the display • BF[7:0] defines the number of lines for the bottom fixed area on the display, there is no bottom fixed area when BF[7:0] = 0. Figure 12 illustrates the 4 scrolling configurations that can be defined. Table 34 Vertical scrolling definition register bits There are 3 different scrolling modes, which are selected as follows: 1. TF + SA + BF = 130 rolling Scroll mode; see Section 6.2.24.1 2. TF + SA + BF = 131 non-rolling Scroll mode; see Section 6.2.24.2 3. TF + SA + BF = 132 non-rolling Scroll mode; see Section 6.2.24.3. The recommended sequence for setting up the scroll modes is illustrated in Fig.13. D/C 76543210 DEFAULT 000110011 33H 1TF7 TF6 TF5 TF4 TF3 TF2 TF1 TF0 00H 1SA7 SA6 SA5 SA4 SA3 SA2 SA1 SA0 82H 1BF7 BF6 BF5 BF4 BF3 BF2 BF1 BF0 00H handbook, full pagewidth MGU921 centre screen scroll bottom screen scroll top screen scroll whole screen scroll Fixed area (RAM content displayed) Scrolling area Fig.12 Scrolling modes on the display. |
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