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200 5/ 8/25 ampire co., ltd. 1 specifications for lcd module customer customer part no. ampire part no. ac - 204ayily - 7 0 - a(r) approved by date approved by checked by organized by a m p i r e
200 5/ 8/25 ampire co., ltd. 2 record of revision revision date contents editor 200 5/8/25 new release lorry
200 5/ 8/25 ampire co., ltd. 3 1 features (1) display format : 20 characters 4 lines (2) construction : lcd, bezel, zebra ,pcb and yellow - green +5v led back - light. (3) display type : stn yellow - green mode,transflective,6 o?clock. (4) +5v single power input. ( special request for 3.3v driving, built - in dc/dc converter.) (5) controller: st7066u - 0a (6) normal temperature type. (7) rohs compliant. 2 mechanical data parameter stand value unit dot size 0.55(w) 0.55(h) mm dot pitch 0.60(w) 0.60(h) mm character size 2.95( w) 4.75(h) mm viewing area 76.0(w) 25.2(h) mm module size (w/ led back - light) 98.0(w) 60.0(h) 14.5 max (t) mm 3 absolute maximum ratings parameter symbol min max unit logic circuit supply voltage vdd - vss - 0.3 7.0 v lcd driving voltage v dd - vo - 0.3 10.0 v input voltage v i - 0.3 vdd+0.3 v operating temp. t op 0 5 0 c normal temp. type storage temp. t stg - 2 0 7 0 c
200 5/ 8/25 ampire co., ltd. 4 4 electro - optical characteristics parameter symbol condition min typ max unit note ----- electronic characteristic s ----- logic circuit supply voltage vdd - vss -- 2.7 -- 5.5 v 0 c 4.75 5.0 5.25 25 c 4.75 5.0 5.25 lcd driving voltage vdd - vo 50 c 4.75 5.0 5.25 v 0 ~ 50 c for normal temp. type vih -- 0.7 vdd -- vdd v input voltage vil -- vss -- 0 .3 vdd v logic supply current idd vdd = 5v -- 1.5 2.0 ma ----- optical characteristics ----- contrast cr 25 j -- 5 -- note 1 rise time tr 25 c -- 80 120 ms fall time tf 25 c -- 150 300 ms note 2 q f -- 40 -- q b -- 35 -- q l -- 35 -- viewing angle range q r 25 c & cr 3 2 -- 35 -- deg. note 3 frame frequency ff 25 c -- 64 -- hz ----- led back - light characteristics ----- forward voltage vf -- -- 4.05 4.3 v supply voltage between a&k forward current if vf=4.05v -- 280 -- ma bare led luminous intensity vf=4.05v -- 100 -- cd/ t lcm luminous intensity vf=4.05v -- 30 -- cd/ t a k (note 1) contrast ratio : cr = (brightness in off state) / (brightness in on state) * led dice number = 2 28 =56
200 5/ 8/25 ampire co., ltd. 5 ( note 2 ) response time : (note 3) viewing angle
200 5/ 8/25 ampire co., ltd. 6 5 block diagram & interface e r/w rs db0~db7 vdd vss st7066u-0a lcd panel 20*4 chars com 1-16 seg 1-40 driver seg 41-200 d, m, cl1, cl2 no. symbol function 1 vss ground (0v) 2 vdd supply voltage for logic (+5v or +3.3v) 3 vo contrast adjustment 4 rs data/instruction select 5 r/w read/write select 6 e enable signal 7 db0 data bus 8 db1 data bus 9 db2 data bus 10 db3 data bus 11 db4 data bus 12 db5 data bus 13 db6 data bus 14 db7 data bus 15 led_a led power supply + (5v) 16 led_k led power supply - (5v)
200 5/ 8/25 ampire co., ltd. 7 6 power supply lcd module vo vdd(+5v) r1 r2 vr vss 5v power input lcd bias circuit led back-light lcm 3.4v led_a(pin 15) led_k(pin16) 5v using led back - light using led back - light
200 5/ 8/25 ampire co., ltd. 8 7 timing characteristics write operation vdd=5v item symbol min max unit enable cycle time t cyce 500 -- enable pulse width pw eh 230 -- enable rise/fall time t er ,t ef -- 20 address set - up time (rs, r/w to e) t as 40 -- addr ess hold time t ah 10 -- data set - up time t dsw 80 -- data hold time t h 10 -- ns
200 5/ 8/25 ampire co., ltd. 9 read operation vdd=5v item symbol min max unit enable cycle time t cyce 500 -- enable pulse width pw eh 230 -- enable rise/fall time t er ,t ef -- 20 address s et - up time (rs, r/w to e) t as 40 -- address hold time t ah 10 -- data delay time t ddr -- 160 data hold time t drh 5 -- ns
200 5/ 8/25 ampire co., ltd. 10 8 instruction set code instruction rs r/ w d7 d6 d5 d4 d3 d2 d1 d0 description e.t.(f osc =270 khz) clear display 0 0 0 0 0 0 0 0 0 1 write?20h? to ddram and set ddram address to ?00h? from ac 1.53 ms return home 0 0 0 0 0 0 0 0 1 -- sets dd ram address to ?00h? from ac and return cursor to its original position if shifted. the contents of ddram are not changed. 1.53 ms en try mode set 0 0 0 0 0 0 0 1 i/d sh assign cursor moving direction and enable the shift of entire display. 39 m s display on/off control 0 0 0 0 0 0 1 d c b set display (d), cursor (c), and blink of cursor (b) on/off control bit. 39 m s cursor or display s hift 0 0 0 0 0 1 s/ c r/ l -- -- set cursor moving and display shift control bit, and the direction, without changing of ddram data. 39 m s function set 0 0 0 0 1 dl n f -- -- sets interface data length (dl:8 - bit/4 - bit), number of display lines (n:2 - line/1 - l ine) and , display font type (f:5x11dots/5x8 dost). 39 m s set cg ram address 0 0 0 1 ac 5 ac 4 ac 3 ac 2 ac 1 ac 0 sets cg ram address in address counter. 39 m s set dd ram address 0 0 1 ac 6 ac 5 ac 4 ac 3 ac 2 ac 1 ac 0 sets dd ram address in address counter. 39 m s read busy flag and address 0 1 bf ac 6 ac 5 ac 4 ac 3 ac 2 ac 1 ac 0 whether during internal operation or not can be known by reading bf. the contents of address counter can also be read. 0 m s write data to ram 1 0 d7 d6 d5 d4 d3 d2 d1 d0 writes data into int ernal ram (dd ram /cg ram). 43 m s read data from ram 1 1 d7 d6 d5 d4 d3 d2 d1 d0 reads data from internal ram (dd ram /cg ram). 43 m s * ? -- ? : don?t care note : when an mpu program with checking the busy flag(db7) is made, it must be necesssary1/2fosc is necessary for executing the next instruction by the falling edge of the ?e? signal after the busy flag(db7) goes to ?low?.
200 5/ 8/25 ampire co., ltd. 11 9 initialization sequence 10 dd ram address char. 1 2 3 ? 18 19 20 line 1 00 01 02 ? 11 12 13 line 2 40 41 42 ? 51 52 53 line 3 1 4 15 16 ? 25 26 27 line 4 54 55 56 ? 65 66 67
200 5/ 8/25 ampire co., ltd. 12 11 font table
200 5/ 8/25 ampire co., ltd. 13 12 quality and reliability 12.1 test conditions tests should be conducted under the following conditions : ambient temperature : 25 5 c humidity : 60 25% rh. 12.2 sampling plan sampling method shall be in accordance with mil - std - 105e, inspection level ii, normal inspection, and single sampling plan tables for normal, tightened, and reduced inspection. 12.3 acceptable quality level a major defect is defined as one that cou ld cause failure to or materially reduce the usability of the unit for its intended purpose. a minor defect is one that does not materially reduce the usability of the unit for its intended purpose or is an infringement from established standards and has n o significant bearing on its effective use or operation. 12.4 appearance an appearance test should be conducted by human sight at approximately 30 cm distance from the lcd module under flourescent light. the inspection area of lcd panel shall be withi n the range of following limits.
200 5/ 8/25 ampire co., ltd. 14 12.5 inspection quality criteria item description of defects class of defects acceptable level (%) function short circuit or pattern cut major 0.65 dimension deviation from drawings major 1.5 ave . dia . d ar ea a area b d 0.2 disregard 0.2 0.5 for n = 1 minor 2.5 color uniformity rainbow color or newton ring. minor 2.5 glass scratches obvious visible damage. minor 2.5 contrast ratio see note 1 minor 2.5 response time see note 2 minor 2.5 viewing angle see note 3 minor 2.5 zone a active area zone b viewing area
200 5/ 8/25 ampire co., ltd. 15 12.6 reliability test conditions test item normal temp. type note high temperature operation 5 0 3 c , t= 96 hrs low temperature operation 0 3 c , t= 96 hrs high temperature storage 7 0 3 c , t= 96 hrs 1,2 low temperature storage - 2 0 3 c , t= 96 hrs 1,2 thermal shock test - 20 c ~ 25 c ~ 70 c 30 min. 5 min. 30 min. ( 1 cycle ) total 5 cycle 1,2 humidity test 40 c, humidity 90%, 96 hrs 1,2 vibration t est (packing) sweep frequency : 10 ~ 55 ~ 10 hz/1min amplitude : 0.75mm test direction : x.y.z/3 axis duration : 30 min/each axis 2 note 1 : condensation of water is not permitted on the module. note 2 : the module should be inspected after 1 hour storag e in normal conditions (15 - 35c , 45 - 65%rh). definitions of life end point : l current drain should be smaller than the specific value. l function of the module should be maintained. l appearance and display quality should not have degraded noticeably. l contrast ratio should be greater than 50% of the initial value.
200 5/ 8/25 ampire co., ltd. 16 13 handling precautions (1) an lcd module is a fragile item and should not be subjected to strong mechanical shocks. (2) avoid applying pressure to the module surface. this will distort the glass and cause a change in colour. (3) under no circumstances should the position of the bezel tabs or their shape be modified. (4) do not modify the display pcb in either shape or positioning of components. (5) do not modify or move location of the zebra or heat seal connecto rs. (6) the device should only be soldered to during interfacing. modification to other areas of the board should not be carried out. (7) in the event of lcd breakage and resultant leakage of fluid do not inhale, ingest or make contact with the skin. if contact is made rinse immediately. (8) when cleaning the module use a soft damp cloth with a mild solvent, such as isopropyl or ethyl alcohol. the use of water, ketone or aromatic is not permitted. (9) prior to initial power up input signals should not be applied. (10) protect the module against static electricity and observe appropriate anti - static precautions.
200 5/ 8/25 ampire co., ltd. 17 14 outline dimension ? t 1 a? 1q ?a ? ?~ ?1 ( ?a|aa?? ) ( ?a|aa?? ) ( ?a|aa?? ) ( ?a|aa?? ) ?a??~?1 ( ?a|aa?? )

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