rcm2122r-a/b liquid crystal displays 1/8 16 characters 1 lines cog module rcm2122r-a/b the rcm2122r-a/b is a reflective tn type liquid crystal module which a built-in controller / driver lsi and a display capacity of 16 characters 1 lines. ! applications printers, copiers, facsimiles, etc ! features (1) 5 7 dot character matrix with cursor. (2) interfaces with 8-bit mpus. (3) displays up to 190 characters and special symbols. (4) custom character patterns are displayed with the character ram. (5) abundant instruction set including clear display, cursor on/off, and character blinking. (6) compact and lightweight for easy assembly to the host instrument. (7) operable on single 5v power supply. (8) low power consumption. ! ! ! ! external dimensions (units : mm) 2.62 0.58 0.08 0.46 0.58 0.08 5.2 dot detail 0.50.5 7.50.5 1.5max. 0.50.5 0.50.5 1.10.1 1.10.1 2.750.3 0.30.05 terminal side 3max. (50.62) 57.2min. 60.20.3 4.790.3 0.3max. 1max. 0.35min. 3max. 6.140.3 (5.2) 13.7min. 3.35min. 13.35max. 16.35max. 4.30.3 (1.2) (9) (11) (16.7) 7.00.3 23.70.3 501.3 over-coating regin 1.5 1.2 (6.7) (8.55) (7.8) 36.61.3 150.3 (p1.0 13)130.1 (9.8) 1 14 14 ? 0.70.1 0.50.5 0.50.5 0.50.5 0.50.5
rcm2122r-a/b liquid crystal displays 2/8 ! ! ! ! block diagram e r / w rs v o v dd v ss 40 16 lcd db0 db7 8 ic1 ! ! ! ! pin assignments pin no. 1 2 3 4 5 6 7 symbol pin no. symbol db7 8 db0 db6 9 e db5 10 r / w db4 11 r s db3 12 v o db2 13 v dd db1 14 v ss ! ! ! ! power supply example lcd module v dd v dd ? v o v dd ? v o : lcd drive voltage v dd v r : 10k ? v o v ss fig.1 ! ! ! ! absolute maximum ratings (ta=25 c) parameter min. ? 0.3 ? 0.3 ? 0.3 0 symbol v dd -v ss v dd -v o v in topr tstg max. 6.0 6.0 v dd + 0.3 50 70 unit v v v c c ? 20 power voltage for logics power voltage for driving lcd input voltage operating temperature storage temperature
rcm2122r-a/b liquid crystal displays 3/8 ! ! ! ! electrical characteristics (v dd =5.0v, ta=25 c) parameter symbol v dd v dd ? v o v ih1 v il1 v ih2 v il2 v oh v ol fosc i dd min. 4.75 3.0 2.3 0 0.8v dd 0 2.4 typ. 5.0 1.4 max. 5.25 v dd v dd 0.8 v dd 0.2v dd 0.4 3.6 unit v v v v v v v v ma conditions ioh= ? 0.205ma iol=1.6ma v dd =5.0v, fosc=270khz check pattern rs, r/w, cs e ? ? ? ? ? ? ? ? ? 350 khz 270 190 ? logic power voltage lcd driving voltage "h" input voltage (1) "l" input voltage (1) "h" input voltage (2) "l" input voltage (2) "h" output voltage "l" output voltage clock frequency current consumption ! ! ! ! optical characteristics (ta=25 c) when viewing from below parameter symbol t r t d k 1 2 min. ? ? 1.4 ? 30 30 typ. 100 150 2.0 ? ? ? max. 200 250 ? 10 ? ? unit ms ms ? deg deg deg conditions =0 , =10 vlcd=5.0v k 1.4, =0 vlcd=4.8v k 1.4, =10 vlcd=4.8v =0 , =10 vlcd=5.0v =0 , =10 vlcd=5.0v response time response time contrast ratio viewing angle 90% 100% 10% t r t d 100 0 b 1 b 2 k=b 2 / b 1 1.4 1 2 viewing direction 12 o'clock viewing direction 6 o'clock x x' 2 2' 1 1' y ( = 180 ) y' ( =180 ) z ( =0 ) fig.2 fig.4 fig.3 fig.5 selected condition rise time fall time non-selected selected brightness (%) driving voltage viewing angle contrast ratio (1) definition and (3) definition of contrast ratio "k" (2) definition of viewing angles 1 and 2 (4) definition of optical response
rcm2122r-a/b liquid crystal displays 4/8 ! ! ! ! terminal function db7 db4 h / l input / output upper 4line of data-bus. db7 can be used as busy flag. db3 db0 h / l input / output lower 4line of data-bus. register selected signal l : instruction register (at write) l : busy flag / address counter (at read) h : data register (at write & read) lcd driving voltage input terminal 3.0 5.0v (v dd -v o ) r / w h / l input rs h / l input v o ?? v dd ?? v ss ?? read / write select signal l : write h : read v dd =+5v v ss =0v e h, h / l input data read / write enable signal (active h) symbol level i/o terminal function ! ! ! ! timing chart (1) writing v il v il v il v il v il v il v il v ih v ih v ih v ih v il v ih v il t dsw t h v ih t as t er t ah t ah t ef pw eh pw el rs r / w e db0 db7 t cyce fig.6 valid data parameter symbol t cyce pw eh pw el t er ,t ef t as t ah t dsw t h min. 500 220 280 ? 40 10 60 10 max. ? ? ? 20 ? ? ? ? unit ns ns ns ns ns ns ns ns conditions fig.6 fig.6 fig.6 fig.6 fig.6 fig.6 fig.6 fig.6 "e" cycle time "e" pulse width h level "e" pulse width l level "e" rise/fall time address hold time data setup time data hold time setup time "rs, r/w to e"
rcm2122r-a/b liquid crystal displays 5/8 (2) reading v il v il v il v il v il v ih v ih v ih v ih v ih v oh v ol v oh v ol t ddr t dhr v ih t as t er t ah t ah t ef pw eh pw el rs r / w e db0~db7 t cyce fig.7 valid data parameter symbol t cyce pw eh pw el t er ,t ef t as t ah t ddr t dhr min. 500 220 280 ? 40 10 ? 20 max. ? ? ? 20 ? ? 240 ? unit ns ns ns ns ns ns ns ns conditions fig.7 fig.7 fig.7 fig.7 fig.7 fig.7 fig.7 fig.7 "e" cycle time "e" pulse width h level "e" pulse width l level "e" rise/fall time address hold time data decay time data hold time setup time "rs, r/w to e"
rcm2122r-a/b liquid crystal displays 6/8 ! ! ! ! instruction instruction clear display 0 rs 0 rw 0 d7 0 d6 0 d5 0 d4 0 d3 0 d2 0 d1 1 d0 code description 4.4ms execution time(max.) cursor is returned to home position (address o) after entire display clear. cursor at home 000000001 ? 4.4ms cursor is returned to home position (address o). shifted display is also returned to the original position. contens of ddram are not changed. entry mode 00000001i / ds 106 s cursor advance direction and display shift are set. these operation are performed during data write and read modes. display on / off control 0000001dcb 106 s entire display on / off (d), cursor on / off (c), and character blink (b) at cursor position are set. cursor / display shift 000001s / cr / l ?? 160 s cursor and dispaly are shifted without changing the contents of ddram. function set 00001dla ??? 106 s interface data length (dl), addressing mode of ddram (a) are set. cg ram address set 0001 a cg 106 s cgram address is set. after this what is transmitted and received is the data of cgram. dd ram address set 0 0 1 a dd 106 s ddram address is set. after this what is transmitted and received is the data of ddram. busy flag / address read 01bf ac dd ac cg 0 s busy flag (bf) showing internal operation and contents of address counter are read. cg ram / dd ram data read 10 write data (dd ram) write data (cg ram) 106 s data are written in of ddram or cgram cg ram / dd ram data read 1 ??? ? ?? 1 read data (dd ram) read data (cg ram) 160 s data are read out of ddram or cgram dd ram : display data ram cg ram : character generator ram a cg : address of cgram a dd : address of ddram these correspond to cursor address. ac :address counter used for both ddram and cgram. i / d=1 : increment i / d=0 : decrement s=1 : with display shift s / c=1 : with display shift s / c=0 : cursor movement r / l=1 : shift to the right r / l=0 : shift to the left dl=1 : 8bits a=0 : addressing mode 1 a=1 : addressing mode 2 bf=1 : internal operation is being performed bf=0 : instruction acceptable ? don't care ?? ? ? dl=1
rcm2122r-a/b liquid crystal displays 7/8 ! ! ! ! character code and corresponding character pattern 0 0 1 2 3 4 5 6 7 8 9 a b c d e f 23 1 456789abcdef cgram (01) (02) ( 03 ) ( 04 ) ( 01 ) ( 02 ) ( 03 ) ( 04 ) ( 01 ) ( 02 ) ( 03 ) ( 04 ) ( 01 ) ( 02 ) ( 03 ) ( 04 ) upper 4bit (hex) lower 4bit (hex)
rcm2122r-a/b liquid crystal displays 8/8 ! ! ! ! operation note (1) handling precautions ? protect the module from strong shocks as they can cause damage or defective operation. ? the polarizing plate on the surface of the module is soft and can easily be scratched. wipe away dirt and dust using an alcohol-based cleanser. ? if the liquid crystal panel is damaged and the liquid crystal contacts your clothing or body, wash immediately with soap and water. ? if the module is to be used for long periods subjected to direct sunlight, employ a filter to block the ultravioletrays. ? do not use the module in areas of high temperature or high humidity. do not use the module locations exposed to direct sunlight or fluorescent light. ? a protective film (polyethylene) is pasted over rohm liquid crystal modules to protect the panel surfaces. when peeling this film off, be sure to peel as slow as possible in order to minimize the generation of static electricity. (2) precautions during operation ? do not connect or disconnect the module while the power supply is turned on. ? input the input signal after the module power supply is turned on. when turning if off, turn off the input signal first. otherwise the ic may be damaged by the latch-up phenomenon. (3) precautions during installation ? be sure to use a grounded soldering iron when performing any installation procedures. ? be careful to avoid damage from static electricity. a cmos-ic is used in the modules circuitry that can be easily damaged by static electricity. (4) precautions during unit assembly ? in order to protect the polarizing plate from dirt or scratches, it is recommended to use a protective cover on the front surface. (5) precautions for cog module ? do not subject the front and back surface of the ic to light. doing so may cause defective operation. ? when peeling off the protective film of the panel, use of an ion blower or other device to reduce the generation of static electricity is recommended. ? no special measures are taken to prevent the generation of static electricity on the module. therefore, be sure to take the appropriate measures to prevent the generation of electrical charge on the lcd module by the design of the product itself.
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