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UPD17015 Datasheet(PDF) 69 Page - NEC |
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UPD17015 Datasheet(HTML) 69 Page - NEC |
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69 / 120 page  69 µPD17015 13.3 LCD SEGMENT REGISTER The LCD segment register sets the data indicating the LCD segments to be turned on or off. Fig. 13-3 shows the configuration and position of the LCD segment register in data memory. The LCD segment register exists in data memory and can, therefore, be controlled by all data memory manipulation instructions. One nibble of the LCD segment register sets the display data (turn-on/off data) for four segments. When a bit of the segment register is set to 1, the corresponding LCD segment is lit. When the bit is set to 0, the segment is not lit. Fig. 13-4 indicates the relationship between the LCD segment register and LCD segments, together with display examples. Fig. 13-3 Configuration of LCD Segment Register in Data Memory 0123456789A B C D E F 0 1 2 3 4 5 6 7 61H 62H 63H 64H 65H 66H 67H 68H 69H LCDD8 LCDD8 LCDD7 LCDD6 LCDD5 LCDD4 LCDD3 LCDD2 LCDD1 LCDD0 b 3 b 2 b 1 b 0 Column address Data memory LCD segment register LCD segment register System register Address Symbol |
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