lcd module 4x20 - 3.75mm incl. controller ssd1803 issue 4.2013 zeppelinstr. 19 d-82205 gilching phone +49-(0)8105-77 80 90 fax +49-(0)8105-77 80 99 www.lcd-module.de info@lcd-module.de features * high contrast lcd supertwist display * controller ssd1803 (nearly 100% compa tible with hd44780) * interface for 4- and 8-bit data bus * serial spi interface (sid, sod, sclk) * power supply + 2.7 v ~ +3.45v / 1.5ma * led ba cklight y/g max. 150ma@+25c led backlight blue-white and bla ck-white max. 45ma@+25c * opera ting temperature range -20..+70c * built-in temperature compensation * some more modules with same size and same pinout: - dotmatrix 1x8, 2x16 - graphic 122x32 * no screws required: solder onto pcb only * detachable via 9-pin socket ea b200-9 (2 pcs required) ordering information lcd module 4x20 - 3.73mm with led ba cklight y/g ea dip203g-4nled blue-white ea dip203b-4nlw black-white ea dip203j-4nlw 9-pin socket, height 4.3mm (1 pc.) ea b200-9 ea dip203b-4nlw dimension 75 x 27 mm ea dip203g-4nled dimension 68 x 27 mm ea dip203j-4nlw
ea dip203-4 page 2 electronic assembly reserves the right to change specifications without prior notice. printing and typographical errors reserved. pinout tabel of command (ssd1803, ie=high) instruction c ode description execute time (270khz) re bit rs r/w db 7 db 6 db 5 db 4 db 3 db 2 db 1 db 0 clear display * 0 000 0 0 0 0 0 1 clears all display and returns the cursor to the home position (address 0). 1.53ms cursor at home 0 0 000 0 0 0 0 1 * returns the cursor to the home position (address 0). also returns the display being shifted to the original position. dd ram contents remain unchanged. 1.53ms power down mode 1 0 000 0 0 0 0 1 pd set power down mode bit. pd=0: powerdown mode disable pd=1: powerdown mode enable 39s entry mode set 0 0 0 0 0 0 0 0 1 i/d s cursor moving direction (i/d=0: dec; i/d=1: inc) shift enable bit (s=0: disable; s=1: enable shift) 39s 1 0 0 0 0 0 0 0 1 1 bid segment bidirectional function (bid=0: seg1->seg60; bid=1: seg60->seg1) 39s display on/off control 0 0 0 0 0 0 0 1 d c b d=0: display off; d=1: display on c=0: cursor off; c=1: cursor on b=0: blink off; b=1: blink on 39s extended function set 1 0 0 0 0 0 0 1 fw bw nw fw=0: 5-dot font width; fw=1: 6-dot font width bw=0: normal cursor; bw=1: inverting cursor nw=0: 1- or 2-line (see n); nw=1: 4-line display 39s cursor / display shift 0 0 0 0 0 0 1 s/c r/l * * moves the cursor or shifts the display s/c=0: cursor shift; s/c=1: display shift r/l=0: shift to left; r/l=1: shift to right 39s scroll enable 1 0 0 0 0 0 1 h4 h3 h2 h1 determine the line for horizontal scroll 39s function set 0 0 0 0 0 1 dl n re dh re sets interface data length (dl=0:4-bit; dl=1:8-bit) number of display lines (n=0: 1-line; n=1: 2-line) extension register (re= 0/1) scroll/shift (dh=0: dot scroll; dh=1: display shift) reverse bit (rev=0:normal; rev=1:inverse display) 39s 1 0 0 0 0 1 dl n re be lp cg-/seg-ram blink (be=0: disable; be=1: enable) lp=0: normal mode; lp=1: low power mode 39s cg ram address set 0 0 0 0 1 ac sets the cg ram address. cg ram data is sent and received after this setting. 39s seg ram address set 1 0 0 0 1 * * ac sets the seg ram address. seg ram data is sent and received after this setting. 39s dd ram address set 0 0 01 ac sets the dd ram address. dd ram data is sent and received after this setting. 39s set scroll quantity 1 0 01 * sq sets the quantity of horizontal dot scroll (dh=0) 39s busy flag / address read * 0 1bf ac reads busy flag (bf) indicating internal operation is being performed and reads address counter contents. - write data * 1 0 write data writes data into internal ram (dd ram / cg ram / segram) 43s read data * 1 1 read data reads data from internal ram (dd ram / cg ram / segram) 43s backlight using the led backlight requires a current source or external current-limiting resistor. forward voltage for yellow/green backlight is 3.9~4.2v and for white led backlight is 3.0~3.6v. please take care of derating for t a >+25c. note: do never connect backlight directly to 5v; this may destroy backlight immediately ! pin symbo level function pin symbo level function 1 vss l power supply 0v (gnd) 10 d3 h / l display data 2 vdd h power supply +3.3v 11 d4 (d0) h / l display data 3 vee - contrast adjustment, input 12 d5 (d1) h / l display data 4 rs (cs) h / l h=data, l=command 13 d6 (d2) h / l display data 5 r/w (sid) h / l h=read, l=write 14 d7 (d3) h / l display data, msb 6 e (sclk) h enable (falling edge) 15 - - nc (see ea dip122-5n) 7 d0 (sod) h / l display data, lsb 16 res l reset (internal pullup 10k) 8 d1 h / l display data 17 a - led b/l+ resistor required 9 d2 h / l display data 18 c - led b/l-
ea dip203-4 page 3 electronic assembly reserves the right to change specifications without prior notice. printing and typographical errors reserved. contrast adjustment pin 3 requires driving voltage for contrast vee. adjustment can be done by external potentiometer for example. the capacitor is for a better startup behaviour. note: in contrast to many other dotmatrix lcd modules input is supplied with vdd level here ! crea ting y our own characters all these character display modules got the feature to create 8 own characters (ascii codes 0..7) in addition to the 240 rom fixed codes. 1.) the command "cg ram address set" defines the ascii code (bit 3,4,5) and the dot line (bit 0,1,2) of the new character. example demonstrates creating ascii code $00. 2.) doing 8 times the write command "data write" defines line by line the new character. 8th. byte stands for the cursor line. 3.) the newly defined character can be used as a "normal" ascii code (0..7); use with "dd ram address set" and "data write". set cg ram address data adresse hex bit hex 7 6 5 4 3 2 1 0 01 000 000 $40 xxx 0 0 1 0 0 $04 001 $41 0 0 1 0 0 $04 010 $42 0 0 1 0 0 $04 011 $43 0 0 1 0 0 $04 100 $44 1 0 1 0 1 $15 101 $45 0 1 1 1 0 $0e 110 $46 0 0 1 0 0 $04 111 $47 0 0 0 0 0 $00 addressing: 1st. line $00..$13 2nd. lin e $20..$33 3rd. line $40..$53 4th. line $60..$73 character set a full character set is built-in already. additionally to that 8 more characters can be defined individually. initialisation example for 8 bit mode command rs r/w db7 db6 db5 db4 db3 db2 db1 db0 hex description function set 0 0 0 0 1 1 0 1 0 0 $34 8 bit data length, extension bit re=1 ext. function set 0 0 0 0 0 0 1 0 0 1 $09 4 line mode function set 0 0 0 0 1 1 0 0 0 0 $30 8 bit data length, extension bit re=0 display on/off 0 0 0 0 0 0 1 1 1 1 $0f display on, cursor on, cursor blink clear display 0 0 0 0 0 0 0 0 0 1 $01 clear display, cursor 1st. row, 1st. line entry mode set 0 0 0 0 0 0 0 1 1 0 $06 cursor will be automatically incremented all versions do have a built-in temperature compensation; so there's no more need for contrast adjustment during operation anymore. 2,5k 2,5k vee vdd + 10f
ea dip203-4 page 4 zeppelinstr. 19 d-82205 gilching phone +49-(0)8105-77 80 90 fax +49-(0)8105-77 80 99 www.lcd-module.de info@lcd-module.de electronic assembly reserves the right to change specifications without prior notice. printing and typographical errors reserved. serial mode factory setting for interface is parallel with 4 bit or 8 bit data bus. alternatively the module can be used with serial data stream. for that, solder link spi has to be closed. specification for serial operation mode is described in user manual for ssd1803: http://www.lcd-module.de/fileadmin/eng/pdf/zubehoer/ssd1803_2_0.pdf all dimensions are in mm driving with 5v-systems the supply voltage of the display is necessarily 3.3v. if a 5v-system is used, the level have to be adapted. for example you can use a bidirectional levelshifter (e.g. ps 74lvc4245a), like shown in the opposite figure. compa tibility with ea dip204-4 the displays of ea dip203 and ea dip204 series are electrically and mechanically identical to each other running with 3.3v supply mode. merely a 5v supply is not acceptable with the new ea dip203 series. note: lc-displays are generally not suited to wave or reflow soldering. temperatures of over 80c can cause lasting demage. ea dip203g-4nled ea dip203b-4nlw and ea dip203j-4nlw attention handling precautions!
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