70 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. applications personal computers, word processors, facsimiles, telephones, etc. features 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. 6) abundant instruction set including clear display, cur- sor 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. external dimensions (units: mm)
71 liquid crystal displays RCM2038R block diagram pin assignments power supply example absolute maximum ratings (ta = 25 c)
72 liquid crystal displays RCM2038R electrical characteristics (v dd = 5.0 v 0.25 v, ta = 25 c) optical characteristics (ta = 25 c, f = 0 )
73 liquid crystal displays RCM2038R timing chart (1) writing (2) reading
74 liquid crystal displays RCM2038R pin functions
75 liquid crystal displays RCM2038R instructions
76 liquid crystal displays RCM2038R character code and corresponding character pattern
77 liquid crystal displays RCM2038R reset function when you turn the power supply on using the internal re- set 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 follow- ing timing relationship. t off regulates the power supply breaks, or on and off times. note) when the above power supply conditions are not met, the internal re- set circuit will not operate properly.
|
