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| Liquid crystal displays 16 characters 4 lines reflective character module RCM2038R The RCM2038R is a reflective TN type liquid crystal module with a built-in controller / driver LSI and a display capacity of 16 characters 4 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 181 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. 70 Liquid crystal displays FBlock diagram RCM2038R FPin assignments FPower supply example FAbsolute maximum ratings (Ta = 25_C) 71 Liquid crystal displays FElectrical characteristics (VDD = 5.0 V 0.25 V, Ta = 25_C) RCM2038R FOptical characteristics (Ta = 25_C, = 0_) 72 Liquid crystal displays FTiming chart (1) Writing RCM2038R (2) Reading 73 Liquid crystal displays RCM2038R FPin functions 74 Liquid crystal displays FInstructions RCM2038R 75 Liquid crystal displays FCharacter code and corresponding character pattern RCM2038R 76 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. RCM2038R 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. 77 |
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