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4559 Datasheet(PDF) 47 Page - Renesas Technology Corp |
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4559 Datasheet(HTML) 47 Page - Renesas Technology Corp |
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47 / 148 page  Rev.1.04 Aug 23, 2007 Page 47 of 146 REJ03B0188-0104 4559 Group (6) LCD control register • LCD control register L1 Register L1 controls duty/bias selection, LCD operation, internal dividing resistor selection. Set the contents of this register through register A with the TL1A instruction. The TAL1 instruction can be used to transfer the contents of register L1. • LCD control register L2 Register L2 controls internal dividing resistor operation, selection of pin functions; SEG0/VLC3, SEG1/VLC2, SEG2/VLC1. Set the contents of this register through register A with the TL2A instruction. • LCD control register L3 Register L3 controls selection of pin functions; P20/SEG24 to P23/SEG27. Set the contents of this register through register A with the TL3A instruction. • LCD control register C1 Register C1 controls selection of pin functions; P00/SEG16 to P03/SEG19. Set the contents of this register through register A with the TC1A instruction. • LCD control register C2 Register C2 controls selection of pin functions; P10/SEG20 to P13/SEG23. Set the contents of this register through register A with the TC2A instruction. • LCD control register C3 Register C3 controls selection of pin functions; P30/SEG28 to P33/SEG31. The contents of this register through register A with the TC3A instruction. Note 1.“R” represents read enabled, and “W” represents write enabled. Note 2.“r (resistor) multiplied by 3” is used at 1/3 bias, and “r multiplied by 2” is used at 1/2 bias. Note 3.VLC3 is connected to VDD internally when SEG0 pin is selected. Note 4.Use internal dividing resistor when SEG1 and SEG2 pins are selected. Table 19 LCD control registers (1) LCD control register L1 at reset : 00002 at power down : state retained R/W TAL1/TL1A L13 Internal dividing resistor for LCD power supply selection bit (Note 2) 0 2r × 3, 2r × 2 1 r × 3, r × 2 L12 LCD control bit 0Stop (OFF) 1 Operating LCD duty and bias selection bits L11 L1 Duty Bias L11 0 0 Not available Not available 01 1/2 1/2 10 1/3 1/3 L10 11 1/4 1/3 LCD control register L2 at reset : 00002 at power down : state retained W TL2A L23 SEG0/VLC3 pin function switch bit (Note 3) 0 SEG0 1VLC3 L22 SEG1/VLC2 pin function switch bit (Note 4) 0 SEG1 1VLC2 L21 SEG2/VLC1 pin function switch bit (Note 4) 0 SEG2 1VLC1 L20 Internal dividing resistor for LCD power supply control bit 0 Internal dividing resistor valid 1 Internal dividing resistor invalid LCD control register L3 at reset : 11112 at power down : state retained W TL3A L33 P23/SEG27 pin function switch bit 0 SEG27 1P23 L32 P22/SEG26 pin function switch bit 0 SEG26 1P22 L31 P21/SEG25 pin function switch bit 0 SEG25 1P21 L30 P20/SEG24 pin function switch bit 0 SEG24 1P20 |
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