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url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 1 of 12 LM16032DFC-0B lcd module user manual shenzhen topway technology co., ltd. rev. descriptions release date 0.1 preliminary new release 2004-11-15
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 2 of 12 table of content 1. basic specifications........................................................................................................... ..... 3 1.1 display spec ificat ions ......................................................................................................... ................................... 3 1.2 mechanical sp ecificat ions...................................................................................................... ................................ 3 1.3 block di agram .................................................................................................................. ...................................... 3 1.4 terminal f uncti ons............................................................................................................. .................................... 4 2. absolute maximum ratings.................................................................................................... 5 3. electrical characteristics..................................................................................................... ... 5 3.1 dc characte ristics ............................................................................................................. .................................... 5 3.2 led backlight circuit characte ristics.......................................................................................... ........................... 5 3.3 ac characte ristics ............................................................................................................. .................................... 6 4. function specifications ........................................................................................................ .. 7 4.1 resetting the lcd mo dule ....................................................................................................... .............................. 7 4.2 the parallel interface ......................................................................................................... .................................... 7 4.3 adjusting the lcd display contrast ............................................................................................. ........................... 7 4.4 display memory map ............................................................................................................. ................................ 8 4.5 display control instruct ions ................................................................................................... .............................. 10 5. design and handling precaution ......................................................................................... 12
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 3 of 12 1. basic specifications 1.1 display specifications 1) lcd display mode : stn, negative, transflective 2) display color : display data = ?1? : light gray (*1) : display data = ?0? : deep blue (*2) 3) viewing angle : 6 h 4) driving method : 1/33 duty, 1/5bias 5) back light : white led backlight note: *1. color tone may slightly change by temperature and driving condition *2. the color is defined as the inactive / background color 1.2 mechanical specifications 1) outline dimension : 116.0 x 35.0 x 14.0max (see attached outline drawing for details) 1.3 block diagram rs, r/w, e st7920 or equivalent vdd db0 - db7 led bl circuit vss bl a seg1 | seg64 com32 | com1 st7921 or equivalent seg65 | seg160 lcd panel 160 x 32 pixels v0
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 4 of 12 1.4 terminal functions pin no. pin name i/o descriptions 1 vss power negative power supply, ground (0v) 2 vdd power positive power supply 3 v0 power power supply for lcd driving 4 rs input register select rs=h; data read or write rs=l; instruction data write or status busy flag read 5 r/w input read write control r/w=h; data or status read r/w=l; data or command write 6 e input e=enable trigger 7 db0 i/o : : : 14 db7 i/o three state i/o terminal for display data or instruction data in 4 bit mode, db3~db0 could leave open or pull-up 15 bla power positive power for led backlight 16 nc - no connection should leave open
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 5 of 12 2. absolute maximum ratings items symbol min. max. unit condition supply voltage v dd -0.3 5.5 v v ss = 0v input voltage v in -0.3 v dd +0.3 v v ss = 0v lcd driving voltage v ee -0.3 7.0 v v ss = 0v operating temperature t op 0 50 c no condensation storage temperature t st -10 60 c no condensation cautions: any stresses exceeding the absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not imp lied and prolonged exposure to extreme conditions may affect device reliability. 3. electrical characteristics 3.1 dc characteristics v ss =0v, v dd =5.0v, t op =25 c items symbol min. typ. max. unit applicable pin operating voltage v dd 4.8 5.0 5.2 v vdd lcd driving voltage v 0 - 4.5 - v v0 input high voltage v ih1 0.8v dd - v dd v input low voltage v il1 v ss - 0.4 v rs, r/w, e, db0-db7 output high voltage v oh1 0.7v dd - v dd v db0-db7 (i oh = -0.1ma) output low voltage v ol1 v ss - 0.6 v db0-db7 (i ol = 0.1ma) operating current i dd - 1.9 5.0 ma vdd, vss 3.2 led backlight circuit characteristics v ss =0v, if bla =60ma, t op =25 c items symbol min. typ. max. unit applicable pin forward voltage vf bla - 5.0 - v bla forward current if bla - - 75 ma bla cautions: exceeding the recommended driving current could cause subs tantial damage to the backli ght and shorten its lifetime. vss bla no. of led = 3 pcs
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 6 of 12 3.3 ac characteristics v ss =0v, v dd =5v, t op =25 c item symbol min. typ. max. unit e cycle time tc 1500 - - ns e high level width tpw 175 - - ns e rise time tr - - 20 ns e fall time tf - - 20 ns address set-up time tas 13 - - ns address hold time tah 25 - - ns data set-up time tdsw 50 - - ns data delay time tddr - - 125 ns data hold time th 25 - - ns host write timing diagram host read timing diagram
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 7 of 12 lcd module v0 vdd 4. function specifications 4.1 resetting the lcd module the lcd module will be initialized, reset, after the power on. it is suggested to check the busy flag to ensure the reset procedure finish. the initialized status is as follow: functions initialized status enter mode set i/d=1 cursor move to right s=0 ddram address counter (ac) plus 1 display status d=0 display = off c=0 cursor = off b=0 cursor position blink = off function set dl=1 8bit interface re=0 basic instruction set scroll or ram addr. select sr=0 cgram address access is enabled reverse r1=0, r0=0 first line normal extended function set g=0 graphic display off 4.2 the parallel interface the parallel interface, 8-bit or 4-bit bus interface, could be selected by function set instruction dl bit. in 4-bit bus interface, every 8-bit instruction/data is separated into two parts. first, transfer the higher 4-bit (d7~d4). then transfer the lower 4-bit (d3~d0). they are transferred via db7~db4 terminals, where db3~db0 are not in used (leave open or pull high). 4.3 adjusting the lcd display contrast a variable-resistor may be connected to the lcd module for providing lcd driving voltage, v0. adjusting the vr will result the change of lcd display contrast. the recommended value of vr is 5k ohm.
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 8 of 12 4.4 display memory map there are three main memory-areas in the lcd module for display. - character generator ram (cgram) - graphic display ram (gdram) - display data ram (ddram) 4.4.1 character generator ram (cgram) character generator ram is for storing the user-defined characters (a 16x16 dots font). there are only two characters could be defined. the user-defined character codes are 0000h and 0002h. they could be called into ddram as normal character. cgram data user-defined character code cgram address d15 ~ d8 d7 ~ d0 0000h 00h 01h : : : : 0eh 0fh 0002h 10h 11h : : : : 1eh 1fh cgram address map 4.4.2 graphics display ram (gdram) gdram is for full graphics display. it coul d be displayed when g=1 (set by extended function set in extended instruction set) horizontal address (x) 00h 01h ~ 08h 09h d15 ~ d0 d15 ~ d0 ~ d15 ~ d0 d15 ~ d0 00h 01h : : : : 1eh vertical address ( y ) 1fh gdram address map note: *1. the mapping is based on vertical scroll displacement address=0. *2. another 160x32 graphics display ram s pace is not showed. they could be displa yed by adjusting the vertical scroll displacement address value. 16 x 16 dot font 160x32 pixels 16 x 16 dot font
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 9 of 12 4.4.3 display data ram (ddram) gb character code (16bit, a1a0h~f7ffh) could write into ddram for displaying the simplified chinese character (16x16 dots font). user characters (16bit, 0000h or 0002h) defined by user that stored in cgram could also be used. the display character should be on grid only. ddram address (lower 4bit) 00h 01h 02h ~ 07h 08h 09h h l h l h l ~ h l h l h l 80h ddram address (upper 4bit) 90h ddram address map with 16x16 dots font note: *1. the mapping is based on vertical scroll displacement address=0. *2. another 10x2(characters) display data ram space is not s howed. they could be displayed by adjusting the vertical scroll displacement address value. standard ascii code (8bit, 00h~7fh) could write into ddram for displaying the half-width character (8x16 dots font). the display character should be on grid only, and two characters should be written in each write operation. ddram address (lower 4bit) 00h 01h 02h ~ 07h 08h 09h h l h l h l ~ h l h l h l 80h ddram address (upper 4bit) 90h ddram address map with 8x16 dots font note: *1. the mapping is based on vertical scroll displacement address=0. *2. another 20x2(characters) display data ram space is not s howed. they could be displayed by adjusting the vertical scroll displacement address value. 10 x 2 characters (16x16 dots font) 20 x 2 characters ( 8x16 dots font )
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 10 of 12 4.5 display control instructions 4.5.1 basic instruction set re=0, basic instruction set code instructions rs r/w db7 db6 db5 db4 db3 db2 db1 db0 function clear 0 0 0 0 0 0 0 0 0 1 fill ddram with ?20h?, and set ddram address counter (ac) to ?00h? home 0 0 0 0 0 0 0 0 1 x set ddram address counter (ac) to ?00h? and put cursor to origin. ddram content no changed. entry mode 0 0 0 0 0 0 0 1 i/d s set cursor position and display shift when doing write or read operation i/d=1, cursor move righ t ac increased by 1 i/d=0, cursor move left, ac decreased by 1 s=1, toggle the shift of the entire display (based on i/d defined direction) display on/off 0 0 0 0 0 0 1 d c b d=1, display on d=0, display off c=1, cursor on c=0, cursor off b=1, blink on b=0, blink off cursor display control 0 0 0 0 0 1 s/c r/l x x cursor position and display shift control. ddram content no changed. function set 0 0 0 0 1 dl x re x x dl=1, 8bit interface dl=0, 4bit interface re=1, extended instruction re=0; basic instruction set cgram addr 0 0 0 1 ac5 ac4 ac3 ac2 ac1 ac0 set cgram address to address counter (ac) make sure that in extended instruction sr=0 (scroll or ram address selected) set ddram addr 0 0 ac7 ac6 ac5 ac4 ac3 ac2 ac1 ac0 set ddram address to address counter (ac), where ac7 =1, ac6=0 read bf & addr 0 1 bf ac6 ac5 ac4 ac3 ac2 ac1 ac0 read busy flag (bf) for co mpletion of the internal operation, also read out the value of ac write ram 1 0 d7 d6 d5 d4 d3 d2 d1 d0 write data to internal ram (ddram, cgram,gdram) for 16bit data, write two byte consecutively, high byte first, then low byte read ram 1 1 d7 d6 d5 d4 d3 d2 d1 d0 read data from internal ram (ddram, cgram,gdram) note: *1. for the details of the display control instruct ions, please refer to sitr onix st7920 series datasheet. *2. re is the selection byte of basic and extended instruction set. each time altering the value of re, it will remain. thus, it is not necessary to set re every time when using the same group of instruction set
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 11 of 12 4.5.2 extended instruction set re=1, extended instruction set code instructions rs r/w db7 db6 db5 db4 db3 db2 db1 db0 function scroll or ram addr select 0 0 0 0 0 0 0 0 1 sr sr=1, enable vertical scroll position sr=0, enable cgram address (basic instruction) reverse 0 0 0 0 0 0 0 1 r1 r0 toggle 1 out of 4 line (in ddram) of the display to be reversed (initial value is r1 ,r0 = 0, 0 extended function set 0 0 0 0 1 dl x re g 0 dl=1, 8bit interface dl=0, 4bit interface re=1, extended instruction re=0; basic instruction g=1, graphics display on g=0, graphics display off set scroll addr 0 0 0 1 ac5 ac4 ac3 ac2 ac1 ac0 set the address of vertical scroll make sure extended instruction sr=1, enable vertical scroll position. 0 0 1 ac6 ac5 ac4 ac3 ac2 ac1 ac0 set graphics ram addr 0 0 1 0 0 0 ac3 ac2 ac1 ac0 set the gdram address to address counter (ac) dual byte command should write consecutively first byte set the vert ical address ac6~ac0 second byte set the horizontal address ac3~ac0 note: *1. for the details of the display control instruct ions, please refer to sitr onix st7920 series datasheet. *2. re is the selection byte of basic and extended instruction se t. each time altering the value of re, it will remain. thus, i t is not necessary to set re every time when using the same group of instruction set
topway lcd module user manual LM16032DFC-0B url: www.towpaydispaly.com www.topwaysz.com document name: LM16032DFC-0B-manual-rev0.1.doc page: 12 of 12 5. design and handling precaution 1. the lcd panel is made by glass. any mechanical shock (eg. dropping form high place) will damage the lcd module. 2. do not add excessive force on the surface of the display, which may cause the display color change abnormally. 3. the polarizer on the lcd is easily get scratched. if possible, do not remove the lcd protective film until the last step of installation. 4. never attempt to disassemble or rework the lcd module. 5. only clean the lcd with isopropyl alcohol or ethyl alcohol. other solvents (eg. water) may damage the lcd. 6. when mounting the lcd module, make sure that it is free form twisting, warping and distortion. 7. ensure to provide enough space (with cushion) between case and lcd panel to prevent external force adding on it, or it may cause damage to the lcd or degrade the display result. 8. only hold the lcd module by its side. never hold lcd module by add force on the heat seal or tab. 9. never add force to component of the lcd module. it may cause invisible damage or degrade of the reliability. 10. lcd module could be easily damaged by static electricity. be careful to maintain an optimum anti-static work environment to protect the lcd module. 11. when peeling off the protective film from lcd, static charge may cause abnormal display pattern. it is normal and will resume to normal in a short while. 12. take care and prevent get hurt by the lcd panel sharp edge. 13. never operate the lcd module exceed the absolute maximum ratings. 14. keep the signal line as short as possible to prevent noisy signal applying to lcd module. 15. never apply signal to the lcd module without power supply. 16. ic chip (eg. tab or cog) is sensitive to the light. strong lighting environment could possibly cause malfunction. light sealing structure casing is recommend. 17. lcd module reliability may be reduced by temperature shock. 18. when storing the lcd module, avoid exposure to the direct sunlight, high humidity, high temperature or low temperature. they may damage or degrade the lcd module

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