Display Elektronik GmbH LCD MODULE DEM 20485 SYH-LY Product specification VERSION: 0 14.04.2003 GENERAL SPECIFICATION COB MODULE N0. : DEM 20485 SYH-LY CUSTOMER P / N : VERSION NO. CHANGE DESCRIPTION DATE 0 ORIGINAL VERSION 20001/01/11 PREPARED BY: ZDK DATE: 11.01.2001 APPROVED BY: MH DATE: 14.04.2003 DEM 20485 SYH-LY Product specification CONTENTS 1. FUNCTIONS & FEATURES --------------------------------------------------------------- 2 2 2. MECHANICAL SPECIFICATIONS ---------------------------------------------------------------------------3. BLOCK DIAGRAM ------------------------------------------------------------------------ 2 4. EXTERNAL DIMENSIONS ----------------------------------------------------------------- 3 5. PIN ASSIGNMENT ------------------------------------------------------------------------- 3 4 6.1 PCB DRAWING AND DESCRIPTION-----------------------------------------------------------------------5 6.2 EXAMPLE APPLICATION------------------------------------------------------------------------- 5 6.3 THE SILK TEXTS ARE ON THE PCB .---------------------------------------------------------------------6 7. BACKLIGHT & SWITCH -------------------------------------------------------------------------6 8. DISPLAY DATA RAM (DRAM)-------------------------------------------------------------------7 9. MAXIMUM ABSOLUTE POWER RATINGS---------------------------------------------------------7 10. ELECTRICAL CHARACTERISTICS -------------------------------------------------------- 7 10 -1 DC CHARACTERISTICS---------------------------------------------------------------------------------------- 8 10-2 AC CHARACTERISTICS----------------------------------------------------------------------------------------- 8 10-2-1 WRITE MODE------------------------------------------------------------------------------------------------- 9 10-2-2 READ MODE--------------------------------------------------------------------------------------------------10 11.CONTROL AND DISPLAY COMMAND-----------------------------------------------------------------12.STANDARD CHARACTER PATTERN --------------------------------------------------- 11 13.LCM INITIALIZING BY INSTRUCTION----------------------------------------------- 12 13-1 8 bit INTERFACE MODE------------------------------------------------------------------ 12 13-2 4 bit INTERFACE MODE------------------------------------------------------------------ 13 14 14. LCD MODULES HANDLING PRECAUTIONS----------------------------------------------15 15. OTHERS --------------------------------------------------------------------------------------------------- VERSION : 0 1 DEM 20485 SYH-LY Product specification 1. FUNCTIONS & FEATURES DEM 20485-Series LCD type: MODULE DEM 20485 SYH-LY Viewing Direction LCD MODEL LCD TYPE STN Yellow/Green : 6 O'clock Transflective Positive Mode Driving Scheme : 1/16 Duty Cycle, 1/5 Bias Power Supply Voltage : 2.7V to 5.5V (typ. 5V) Backlight color VLCD Adjustable for Best Contrast : Yellow Green (lightbox) Display Format : 20 x 4 Characters ( 5 x 8 dots, Format : 208 Kinds ) Internal Memory : CGROM ( 10,080 bits) : 4.5V (typ.) : CGRAM ( 64 x 8 bits ) : DDRAM ( 80 x 8 bits for Digits ) Interface : Easy Interface with a 4 - bit or 8 - bit MPU 2. MECHANICAL SPECIFICATIONS Character Pitch : 3.55(w) x 5.35(h) mm Character Size : 2.95(w) x 4.75(h) mm Character Font : 5 x 8 dots Dot Size : 0.55(w) x 0.55(h) mm Dot Gap : 0.05 mm 3. BLOCK Diagram LCD Controller LSI KS0066 SEG1~SEG40 SEGMENT DRIVER KS0063 SEG121~SEG200 V0 VDD VSS COM1~COM16 SEG41~SEG120 DB0~DB7 E R/W RS LCD PANEL 4line x 20characters SEGMENT DRIVER KS0063 Control signals A K BACKLIGHT Figure 1.0 VERSION : 0 2 DEM 20485 SYH-LY Product specification 4. External Dimensions Figure 2.0 5. PIN Assignment Pin No. 1 2 3 4 Symbol VSS VDD V0 RS 5 R/W 6 7 8 9 10 11 12 13 14 15 16 E DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 LED - ( K ) LED + ( A ) VERSION : 0 Function Ground terminal of module Supply terminal of module +5 V Power Supply for Liquid crystal Drive Register Select RS = 0 (Instruction Register) RS = 1 (Data Register) Read / Write R/W = 1 (Read) R/W = 0 (Write) Enable Bi-directional Data Bus, Data Transfer is performed once , thru DB0~DB7 , in the case of interface data . Length is 8-bits; and twice , thru DB4~DB7 in the case of interface data length is 4-bits . Upper four bits first then lower four bits . Please also refer to 6.1 PCB drawing and description . Please also refer to 6.1 PCB drawing and description . 3 DEM 20485 SYH-LY Product specification 6.1 PCB DRAWING AND DESCRIPTION J1 R1 R2 J4 R8 R7 J6 R3 R4 R5 J5 J3 J2 R6 1 - + 16 Figure 3.0 Description : 6-1-1.The polarity of the pin 15 and the pin 16 Symbol Symbol J3,J5 State J2,J4 Each Solder- Bridge Each Open J3,J5 Each Solder- Bridge J2,J4 LED Polarity 15 Pin 16 Pin Anode Cathode Each Open Cathode Anode 6-1-2. The metal-bezel should be on gronud when the J1 is Solder- Bridge . 6-1-3. The LED Resistor should be bridged when the J6 is Solder-Bridge . 6-1-4. The R7 and R8 are the LED Resistor. (R7=R8=10 Ohm). VERSION : 0 4 DEM 20485 SYH-LY Product specification 6.2 Example application 6-2-1 The LED resistor should be bridged as following . R8 R7 J6 6-2-2 The 15 pin is the Anode and the 16 pin is the cathode as following . J4 J3 J2 J5 6-2-3 The 15 pin is the cathode and the 16 pin is the Anode as following . J3 J4 J2 J5 6-2-4 The metal-bezel is on ground as following . J1 6.3 The module No. is printed on the PCB . 1 16 Figure 4.0 VERSION : 0 5 DEM 20485 SYH-LY Product specification 7. BACKLIGHT & SWITCH (Ta = -20 ~ +70°C) Item Symbol Standard Value Unit Backlight Voltage V 5 V Backlight Current I ~ 200 mA Applicable Terminal LED+ / LED- 28 x 2 dices A K Figure 5.0 8. DISPLAY DATA RAM ( DDRAM ) DISPLAY POSITION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 FIRST LINE 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 SECOND LINE 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 THIRD LINE 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 FOURTH LINE 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67 DD RAM ADDRESS VERSION : 0 6 DEM 20485 SYH-LY Product specification 9. MAXIMUM ABSOLUTE POWER RATINGS (Ta = 25°C) Item Power supply voltage(1) Power supply voltage(2) Symbol VDD V0 Standard value -0.3 ~ +7.0 VDD-15.0 ~ VDD+0.3 Unit V V VIN -0.3 ~ VDD+0.3 V VLED1 Topr Tstg 4 ~ 4.5 -20 ~ +70 -30 ~ +80 V °C °C Input voltage Volt. For BL Operating temperature Storage temperature 10. Electrical Characteristics 10-1. DC Characteristics (VDD = 4.5V ~ 5.5V, Ta = -20 ~ +70°C) Operating Voltage VDD Standard Value MIN TYP MAX 4,5 5 5,5 Supply Current IDD 0,35 Input Voltage(1) VIL1 -0,3 0,6 (except OSC1) VIH1 2,2 VDD Input Voltage(2) VIL2 ( OSC1) VIH2 -0,2 VDD-1.0 1.0 VDD Output Voltage (1) VOL1 (DB0 TO DB7) VOH1 Output Voltage (2) VOL2 Item (except DB0 TO DB7) Voltage Drop Symbol VOH2 0,6 0,4 2,4 Test Condition VDD=5V,fosc=270kHz V V IOL=1.2mA 0.1VDD 0.9VDD IOL=40uA VdSEG 1 IO=0.1±mA V 1 VIN=0 V to VDD uA uA IIKG -1 Input Low Current IIL -50 -125 -250 VIN=0V,VDD=5V(pull up) fOSC1 190 270 350 Rf = 91k ± 2% (VDD=5V) fOSC 125 45 270 50 410 55 0,2 LCD Driving Voltage VLCD VERSION : 0 3.0 V IOH=-40uA 1 duty tR,tF V IOH=-0.205mA VdCOM External Clock mA V Input Leakage Current Internal Clock (external Rf) Unit 13.0 kHz kHz % us VDD-V5(1/5,1/4 Bias) V 7 DEM 20485 SYH-LY Product specification 10-2 AC Characteristics (VDD = 4.5V ~ 5.5V, Ta = -20 ~ +70°C) 10-2-1. Write mode (writing data from MPU to DEM 20485-Series) Characteristic E Cycle Time Symbol tC Min 500 Typ Max Unit ns Test PIN E E Rise Time tR 20 ns E E Fall Time tF 20 ns E E Pulse width (High,Low) tW 230 ns E R/W and RS Set-up Time tSU1 40 ns R/W,RS R/W and RS Hold Time tH1 10 ns R/W,RS Data Set-up Time tSU2 80 ns DB0~DB7 Data Hold Time tH2 10 ns DB0~DB7 Figure 6.0 VERSION : 0 8 DEM 20485 SYH-LY Product specification 10-2-2.Read mode (Reading data from DEM 20485-Series to MPU) Characteristic E Cycle Time Symbol tC Min 500 Typ Max Unit ns Test PIN E E Rise Time tR 20 ns E E Fall Time tF 20 ns E E Pulse width (High , Low) tW 230 ns E R/W and RS Set-up Time tSU 40 ns R/W,RS R/W and RS Hold Time tH 10 ns R/W,RS Data output Delay Time tD ns DB0~DB7 ns DB0~DB7 Data Hold Time tDH 120 5 Figure7.0 VERSION : 0 9 DEM 20485 SYH-LY Product specification 11. CONTROL AND DISPLAY COMMAND Command Remark RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Execution time (fosc=270KHz) clear Display Return home Entry mode set L L L L L L L L L H 1.53ms L L L L L L L L H X 1.53ms L L L L L L L H I/D SH 39us I/D:set cursor move direction I/D H Increase l Decrease SH:Specifies shift of display SH H Display is shifted L Display is not shifted Display on/off control L L L L L L H D C 39us Display B Cursor move to first digit D H L Display on Display off C H L Cursor on Cursor off B H L Blinking on Blinking off SC H L H L Display shift Cursor move Right shift Left shift H L H L H L 8bits interface 4bits interface 2 line display 1 line display Display on Display off Cursor Blinking Cursor or L L L L L H S/C R/L X X 39us R/L Display Shift function Set L L L L H DL N F X X 39us DL N F Set CGRAM L address Set DDRAM L address Read busy L flag& address Write data to RAM Read data from RAM L L H AC5 AC4 AC3 AC2 AC1 AC0 39us L H AC6 AC5 AC4 AC3 AC2 AC1 AC0 39us H BF AC6 AC5 AC4 AC3 AC2 AC1 AC0 0us CGRAM data is sent and received after this setting DDRAM data is sent and received after this setting BF H L D7 D6 D5 D4 D3 D2 D1 D0 43us H H D7 D6 D5 D4 D3 D2 D1 D0 43us H Busy L Ready -Reads BF indication internal operating is being performed -Reads address counter contents Write data into DDRAM or CGRAM Read data from DDRAM or CGRAM *X:Don't care 10 VERSION : 0 DEM 20485 SYH-LY Product specification 12. 10. STANDARD CHARACTER PATTERN Upper(4bit) LLLL Lowerr(4bit) LLLH LLHL LLHH LHLL LHLH LHHL LHHH HLLL HLLH HLHL HLHH HHLL HHLH HHHL HHHH CG RAM LLLL (1) LLLH (2) LLHL (3) LLHH (4) LHLL (5) LHLH (6) LHHL (7) LHHH (8) HLLL (1) HLLH (2) HLHL (3) HLHH HHLL HHLH (4) (5) (6) HHHL (7) HHHH (8) VERSION: 0 11 DEM 20485 SYH-LY Product specification 13. LCM INITIALIZING BY INSTRUCTION 13-1 8-bit interface mode Power on Condition : fosc=270khz Wait for more than 30ms after VDD rises to 4.5v RS 0 Function set RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 1 1 N F X X N 0 1 1-line mode 2-line mode F 0 1 display off display on D 0 1 display off display on C 0 1 cursor off cursor on B 0 1 blink off blink on I/D 0 1 decrement mode increment mode SH 0 1 entire shift off entire shift on Wait for more than 39us RS 0 Display on/off control RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 1 D C B Wait for more than 39us RS 0 Display clear RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 0 0 1 Wait for more than 1.53ms RS 0 Entry mode set RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 1 I/D SH Initialization end VERSION : 0 12 DEM 20485 SYH-LY Product specification 13 -2 4-bit interface mode Power on Condition : fosc=270khz Wait for more than 30ms after VDD rises to 4.5v RS 0 0 0 RW 0 0 0 Function set DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 0 X X X X 0 0 1 0 X X X X N F X X X F X X Wait for more than 39us RS 0 0 RW 0 0 Display on/off control DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 X X X X 1 D C B X X X X N 0 1 1-line mode 2-line mode F 0 1 display off display on D 0 1 display off display on C 0 1 cursor off cursor on B 0 1 blink off blink on I/D 0 1 decrement mode increment mode SH 0 1 entire shift off entire shift on Wait for more than 39us RS 0 0 RW 0 0 Display clear DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 X X X X 0 0 0 1 X X X X Wait for more than 1.53ms RS 0 0 RW 0 0 Entry mode set DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 X X X X 0 1 I/D SH X X X X Initialization end VERSION : 0 13 DEM 20485 SYH-LY Product specification 14. LCD Modules Handling precautions The display panel is made of glass. Do not subject it to a mechanical shock by dropping it from a high place ,etc. If the display panel is damaged and the liquid crystal substance inside it leaks out , do not get any in your mouth . If the substance come into contact with your skin or clothes promptly wash it off using soap and water. Do not apply excessive force to the display surface or the adjoining areas since this may cause the color tone to vary. The polarizer covering the display surface of the LCD module is soft and easily scratched. handle this polarize carefully To prevent destruction of the elements by static electricity , be careful to maintain an optimum work environment. -Be sure to ground the body when handling the LCD Modules. -Tools required for assembly, such as soldering irons, must be properly grounded. -To reduce the amount of static electricity generated, do not conduct assembly and other work under dry conditions. -The LCD Module is coated with a film to protect the display surface. Exercise care when peeling off this protective film since static electricity may be generated. Storage Precautions When storing the LCD Modules, avoid exposure to direct sunlight or to the light of fluorescent lamps. Keep the modules in bags designed to prevent static electricity charging under low temperature / normal humidity conditions ( avoid high temperature / high humidity and low temperatures below 0°C).Whenever possible, the LCD Modules should be stored in the same conditions in which they were shipped from our company. VERSION : 0 14 DEM 20485 SYH-LY Product specification 15. Others Liquid crystals solidify at low temperature (below the storage temperature range) leading to defective orientation of liquid crystal or the generation of air bubbles (black or white). Air bubbles may also be generated if the module is subjected to a strong shock at a low temperature. If the LCD Modules have been operating for a long time showing the same display patterns the display patterns may remain on the screen as ghost images and a slight contrast irregularity may also appear. Abnormal operating status can be resumed to be normal condition by suspending use for some time. It should be noted that this phenomena does not adversely affect performance reliability. To minimize the performance degradation of the LCD Modules resulting from caused by static electricity , etc . Exercise care to avoid holding the following sections when handling the modules: -Exposed area of the printed circuit board -Terminal electrode sections VERSION : 0 15