an a g vision an a g vision a v2020 an a g vision mec hanical da ta item standar d v alue unit module siz e 116.0 x 37.0 mm v ie wing ar ea 85.0 x 18.6 mm dot siz e 0.6 x 0.65 mm char acter siz e 3.2 x 5.55 mm absolute maxim um r a ting standar d v alue item symbol min. typ . max. unit v -module vdd-vss -0.3 - - - 7.0 v v -input vi -0.3 - - - vdd v vss=0v , vdd=5.0v pin assignment no . symbol function 1 v ss gnd, 0v 2 v dd +5v 3 v 0 l cd driv e 4 rs function select 5 r/w r ead/w rite 6 e ena b le signal 7-14 db0-db7 da ta bus line 15 a* 16 k 4.2v f or led p ow er supply f or led 0v 5x7 dots with cur sor 1/16 duty +5v sing le supply built in contr oller (ks0066 or equiv alent) b/l driv en b y pin1 and 2, 15 and 16 or a,k 20x2 char acter v erf gbar stn: g elb-g r n g elb-g r n led b lau ne g a tiv g r au positv r ef lectiv positiv positiv led g elb led w ei ? led w ei ? conrad best.-nr : 183350 184748 181655 181669 electr onical char acteristics standard value item symbol condit. min. typ. max. unit input v olta g e vdd vdd=+5v 4.7 5.0 5.3 v supply cur ent idd vdd=+5v 1.6 2.5 ma 0 c 4.6 4.8 5.2 25 c 4.1 4.5 4.7 50 c 3.9 4.2 4.5 recommended lc driving voltage for standard temp. modules vdd-v0 v led f orw ar d v olta g e vf 25 c - - - 4.2 4.6 v led f orw ar d cur r ent if 25 c - - - 210 320 ma - - - iled 30 50 led wei ? voltage * 3.5 v 40 ma t his da ta sheet is f or r ef er ence only . t he color of the disply ma y v ary slightly de pending on dif f er ent pr oduction lots and ambient light. w e r eser v e the right to c hang es and impr o vments without prior notice . www.datasheet.in
an a g vision an a g vision this da t a sheet is for reference onl y . we reser ve the right t o changes and improvments without prior notice. tel.: +49 89 89979764 email: info@dst-gmbh.de fax: +49 89 89979765 internet: www.dst-gmbh.de toose iuni instr uctions a v chara cter modules instructions and font table engl./japanese for standard character modules. font t able character types (std. engl./jap .) llll lllh llhl llhh lhll lhlh lhhl lhhh hlll hllh hlhl hlhh hhll hhlh hhhl hhhh llll lllh llhl llhh lhll lhlh lhhl lhhh hlll hllh hlhl hlhh hhll hhlh hhhl hhhh ( 8 ) ( 7 ) ( 6 ) ( 5 ) ( 4 ) ( 3 ) ( 2 ) ( 1 ) cg ram ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 ) ( 7 ) ( 8 ) upper 4bit lo wer 4 bit chara cter module commands command code rs r/w db7 db6 db5 db4 db3 db2 db1 db0 description executing time clear displa y return home entr y mode set displa y on/off control cursor & displa y shift function set set cg ram address set dd ram address read busy flag & address write da t a t o cg ram or dd ram read da t a from cg or dd ram clear the displa y and return the cursor t o the home position (address 0) return the cursor t o the home position (address 0); also return a shifted displa y t o the home position. ddram contents remain unchanged. set the cursor`s move direction and enable/disable the displa y turn the displa y on/off(d), or the cursor on/off(c), and blink of the character a t the cursor position(b). move the cursor and shift the displa y without changing dd ram contents. set the da t a width(dl), the number of lines in displa y(l), and the character font(f). set the cg ram address. cg ram da t a can be read or al tered after making this setting. set dd ram address. da t a ma y be written or read after making this setting read the busy flag(bf) indica ting tha t an internal opera tion is being performed and read the address counter contents. write da t a int o dd ram or cg ram. read da t a from dd ram or cg ram. dd ram: displa y da t a ram cg ram: character genera t or ram acg: cg ram address add: dd ram address corresponds t o cursor address ac: address counter used for both dd and cg ram address. i/d=1: increment i/d=0 decrement s=1: accomp anies displa y shift s/c=1: displa y shift s/c=0 cursor move r/l=1 shift t o the right r/l=0: shift t o the left dl=1: 8 bits dl=0: 4 bits n=1: 5x10 dots n=0: 5x7 dots bf=1: busy bf=0: can accept da t a 82 s - 1.64ms 40 s - 1.64ms 40 s 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 i/d s 0 0 0 0 0 0 1 d c b 0 0 0 0 0 1 s/c r/l 0 0 0 0 1 dl n f 0 0 0 1 acg 0 0 1 add 0 1 bf ac 1 0 write da t a 1 1 read da t a 40 s 40 s 40 s 40 s 40 s 1 s 43 s 43 s " ": don`t care f osc : 27khz commands/codes/discription execution time changes with change in internal oscilla tion frequency (fosc). example: when fosc = 270khz 40 s x = 37 s 250 270 (fosc = 270khz) www.datasheet.in
an a g vision an a g vision this da t a sheet is for reference onl y . the color of the displa y ma y v ar y slightl y depending on different production lots and ambient light . we reser ve the right t o changes and improvments without prior notice. tel.: +49 89 89979764 email: info@dst-gmbh.de fax: +49 89 89979765 internet: www.dst-gmbh.de toose iuni connecting a v chara cter modules po wer suppl y / interf a ce t o mcu / infoma tion on chara cter ic and led b a cklight power suppl y for lcd module 1.single suppl y vol t age types (internal n.v .) 2. dual suppl y vol t age types +5v +5v vdd lcm v0 vss vdd lcm v0 vss vdd vdd gnd gnd vr vr vdd-v0 vee vdd-v0: lcd driving vol t age r: 10k - 20k vdd-v0: lcd driving vol t age r: 10k - 20k vdd-v0 d0-d7 r/w lcm rs e address la tch db4-db7 r/w rs lcm e 3. interf ace t o 4-bit mpu (hmcs43c) 1. interf ace t o z-80 mpu 2. interf ace t o 6800 mcu 4. interf ace t o 8051 mcu interf ace t o mcu ad a1-a7 m u x c d r q z80 d0-d7 irq rd wr rs e lcm r/w d0-d7 d0-d7 d0-d7 r/w r/w lcm 6800 mpu rs rs o 2 vma address decoder e a15 a14 a13 ad0-ad7 8051 mpu ale wr rd a15 a14 a13 hmcs43c d15 d14 d13 r10-r13 address decoder character block diagram and led backlight there are three possibilities t o use led backlight in anag vision character modules. driving the led through a current limiting resist ance (ra) which is already included in the lcm, by external 5v t o j1 and j2 between pin 1 and pin 2. providing 5v by pin 15 and 16 of the interf ace t o drive the led, j15 and j16 must be shortened and ra = 3~7 ohms in this case. providing 4.2v by direct connection t o the led through a current limiting resist ance. usage of led backlight character block ic diagram da t a register (dr) is regularl y used for temporar y st orage of da t a read/write from/int o dd ram and cg ram. instruction register (ir) is used for st oring instruction codes and address informa tion of the displa y da t a (dd) ram and character genera t or (cg) ram. busy flag (bf) is "1" when the lcm is in internal opera tion and cannot accept the next instruction or da t a. character genera t or (cg) rom genera tes character p a tterns from 8-bit code. the cg rom provides 192 character p a tterns. character genera t or (cg) ram allowes the user t o design and rewrite character p a tterns according the program. address counter (ac) is used t o give the address informa tion of the dd ram and cg ram. displa y da t a (dd) ram is used t o st ore the displa y da t a expressed by 8-bit character code. the cap acity is 80 x 8 bits and 80 characters can be st ored. cursor and blink control genera tes the cursor and blink. d0-d3 r/w rs lcm e d4-d7 vdd v0 vss i/o b u f f e r busy flag dr ir d e c o d e r ac dd ram cg ram p t o s register cursor and blink ckt com driving circuit timing control circuit cg ram drivin circuit power supply for lcd module/interface to mcu character block diagram and led backlight www.datasheet.in
an a g vision an a g vision this da t a sheet is for reference onl y . we reser ve the right t o changes and improvments without prior notice. tel.: +49 89 89979764 email: info@dst-gmbh.de fax: +49 89 89979765 internet: www.dst-gmbh.de toose iuni initializing a v chara cter modules initialization procedure on 8-bit and 4-bit interfaces of standard character modules. initializa tion procedure figure1: 8-bit interf ace bf cannot be checked before this instruction. function set interf ace is 8 bits long. bf cannot be checked before this instruction. function set interf ace is 8 bits long. bf cannot be checked before this instruction. function set interf ace is 8 bits long. bf can be checked after the following instructions. if the bf is not checked, the w aiting time between instructions is longer than the instruction execution time. function set [interf ace is 8 bits long. the number of displa y lines and characters is specified. neither cannot be changed after w ards]. displa y off displa y clear entr y mode set [cond.: fosc=270khz] power on w ait for more than 30ms after vcc rises t o 4.5v rs r/w db7 db6 db5 db4 0 0 0 0 1 1 w ait for more than 100 s w ait for more than 4.1 s rs r/w db7 db6 db5 db4 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 initializa tion ends rs r/w db7 db6 db5 db4 0 0 0 0 1 1 rs r/w db7 db6 db5 db4 0 0 0 0 1 1 0 0 n f 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 i/d s figure2: 4-bit interf ace power on w ait for more than 30ms after vcc rises t o 4.5v rs r/w db7 db6 db5 db4 db3 db2 db1 db0 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 w ait for more than 100 s w ait for more than 4.1 s rs r/w db7 db6 db5 db4 db3 db2 db1 db0 rs r/w db7 db6 db5 db4 db3 db2 db1 db0 rs r/w db7 db6 db5 db4 db3 db2 db1 db0 0 0 0 0 1 1 n f 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 i/d s initializa tion ends initializa tion by setting the softw are [character type lcm]. refere t o figures 1 and 2 for procedures on 8-bit and 4-bit initializa tion accordingl y . www.datasheet.in
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