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| Liquid crystal displays 24 characters 2 lines reflective character module RCM2030R The RCM2030R is a reflective TN type liquid crystal module with a built-in controller / driver LSI and a display capacity of 24 characters 2 lines. FApplications Personal computers, word processors, facsimiles, telephones, etc. FFeatures 1) Wide viewing angle and high contrast. 2) 5 7 dot character matrix with cursor. 3) Interfaces with 4-bit or 8-bit MPUs. 4) Displays up to 226 characters and special symbols. 5) Custom character patterns are displayed with the character RAM. FExternal dimensions (Units: mm) 6) Abundant instruction set including clear display, cursor on / off, and character blinking. 7) Compact and light weight for easy assembly to the host instrument. 8) Operable on single 5 V power supply. 9) Low power consumption. 86 Liquid crystal displays FBlock diagram RCM2030R FPin assignments FPower supply example FAbsolute maximum ratings (Ta = 25_C) 87 Liquid crystal displays FElectrical characteristics (VDD = 5.0 V 0.25 V, Ta = 25_C) RCM2030R FOptical characteristics (Ta = 25_C, = 0_) 88 Liquid crystal displays FTiming chart (1) Writing RCM2030R (2) Reading 89 Liquid crystal displays RCM2030R FPin functions 90 Liquid crystal displays FInstructions RCM2030R 91 Liquid crystal displays FCharacter code and corresponding character pattern RCM2030R 92 Liquid crystal displays FReset function When you turn the power supply on using the internal reset circuit, the module automatically returns to its initial (reset) settings. At the initial settings, the following instructions are carried out. (1) Clear display The busy flag remains in the busy condition (BF = 1) until initialization is completed. This takes 15 ms. (2) Function set DL = 1: 8-bit interface data length N=1 F = 0: 5 7 dot matrix (3) Display on / off control D = 0: Display off C = 0: Cursor off B = 0: Blinking off (4) Entry mode set 1 / D = 1: +1 (increment) S = 0: No shift (5) Select DD RAM Depending on the power supply's rise and fall times when it is turned on, there may be times when the initialization cannot be completed. Therefore, be aware of the following timing relationship. RCM2030R tOFF regulates the power supply breaks, or on and off times. Note) When the above power supply conditions are not met, the internal reset circuit will not operate properly. 93 |
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