LCD Module Specification Model: LG128642-BMDWH6V Table of Contents ● ● ● ● ● ● ● ● ● ● ● ● COVER & CONTENTS ······················· 1 BASIC SPECIFICATIONS ····················· 2 ABSOLUTE MAXIMUM RATINGS ················· 3 ELECTRICAL CHARACTERISTICS ··············· 4 OPERATING PRINCIPLES & METHODES ··········· 7 DISPLAY CONTROL INSTRUCTIONS ············· 10 DISPLAY DATA RAM ADDRESS MAP ············· 13 CONNECTION WITH 8051 FAMILY MPU ············ 14 ELECTRO—OPTICAL CHARACTERISTICS ·········· 15 DIMENSIONAL OUTLINE ····················· 17 LCD MODULE NUMBERING SYSTEM ············· 18 PRECAUTIONS FOR USE OF LCD MODULE ········· 19 LG128642-BMDWH6V 1. BASIC SPECIFICATIONS 1.1 Features Display Format LCD Mode : 128 X 64 Dots : STN－Blue－Negative－Transmissive Driving Method : Viewing Direction : Backlight : Outline Dimension : Viewing Area : Dot Size : Dot Pitch : Weight : Controller : 1/64 Duty, 1/9 Bias 6:00 LED, white color 75.0(W) X 52.7(H) X 11.5(T) 60.0(W) X 32.6(H) 0.40 X 0.40 0.43 X 0.43 45 S6B0108 (KS0108B) mm mm mm mm g 1.2 Block Diagram S6B0107 64 COM or Eqv. LCD PANEL 128 x 64 dots 64 SEG VDD VSS VO VOUT Power Circuit To LSI S6B0108 or Eqv. DB0 DB7 RS, R/W, E, /RST /CS1 /CS2 LEDA LEDK LED Backlight 64 SEG S6B0108 or Eqv. -2- LG128642-BMDWH6V -3- 1.3 Terminal Functions Pin No. Symbol Level Function 1 VDD +5V Power supply for logic 2 VSS 0V Ground 3 VO - 4 DB0 H/L Data bit0 5 DB1 H/L Data bit1 6 DB2 H/L Data bit2 7 DB3 H/L Data bit3 8 DB4 H/L Data bit4 9 DB5 H/L Data bit5 10 DB6 H/L Data bit6 11 DB7 H/L Data bit7 12 /CS1 L Chip selection for IC1, active “L” 13 /CS2 L Chip selection for IC2, active “L” 14 /RST L Reset signal, active “L” 15 R/W H/L 16 RS H/L 17 E H, H→L 18 VOUT -10V Output voltage for LCD driving 19 LEDA +5V Power supply for LED backlight 20 LEDK 0V Power supply for LED backlight Operating voltage for LCD (contrast adjusting) Read/Write selection H: Read operation L: Write operation Register selection H: Display data L: Instruction code Enable signal. Read data when E is “H”, write data at the falling edge of E 2. ABSOLUTE MAXIMUM RATINGS Item Symbol Min. Max. Unit Supply Voltage(Logic) VDD-VSS -0.3 7.0 V Supply Voltage(LCD) VDD-VO -0.3 19.0 V VI -0.3 VDD+0.3 V Operating Temp. Topr -20 70 ℃ Storage Temp. Tstg -30 80 ℃ Input Voltage LG128642-BMDWH6V -4- 3. ELECTRICAL CHARACTERISTICS (VDD=5.0V±10%, Ta=25℃) 3.1 DC Characteristics Item Min. Typ. Max. Unit 4.5 5.0 5.5 V VDD-VO -- 11.2 -- V Input High Voltage VIH 2.0 -- VDD V Input Low Voltage VIL 0 -- 0.8 V Output High Voltage VOH IOH=-0.2mA 2.4 -- VDD V Output Low Voltage VOL IOL=1.6mA 0 -- 0.4 V Supply Current (Logic) IDD -- 6.0 8.0 mA Supply Voltage (Logic) Supply Voltage (LCD Driving) Symbol Condition VDD VDD=5.0V (VDD=5.0V±10%, Ta=25℃) 3.2 Interface Timing Chart Characteristic Min. Typ. tC 1000 -- -- ns E High Level Width tWH 450 -- -- ns E Low Level Width tWL 450 -- -- ns E Rise Time tR -- -- 25 ns E Fall Time tF -- -- 25 ns Address Set-Up Time tASU 140 -- -- ns Address Hold Time tAH 10 -- -- ns Data Set-Up Time tDSU 200 -- -- ns Data Delay Time tD -- -- 320 ns Data Hold Time(Write) tDHW 10 -- -- ns Data Hold Time(Read) tDHR 10 -- -- ns E Cycle Symbol Max. Unit LG128642-BMDWH6V tC t WL E tR t WH tF t AH t ASU R/W t ASU t AH /CS1, /CS2 RS t DSU t DSU DB0~DB7 Fig.1 MPU Write Timing tC t WL E tR t WH tF R/W t ASU t AH t AH t ASU /CS1, /CS2 RS tD DB0~DB7 Fig.2 MPU Read Timing t DHR -5- LG128642-BMDWH6V -6- 3.3 LED Backlight Characteristics (Ta=25℃) Item Symbol Forward Voltage Vf Forward Current If Condition Vf=3.1V Color Min. Typ. Max. Unit 2.9 3.1 3.3 V -- 45 -- mA White 3.4 Power Supply VDD +5V VR 20 k Ω VO LCM VSS VOUT LEDA +5V LEDK Note: 5V voltage for the LED backlight should be supplied to Pin19 (LEDA) and Pin20 (LEDK) terminal of the interface, it should not be supplied to the Anode/Cathode terminal of the LED backlight directly. LG128642-BMDWH6V -7- 4. OPERATING PRINCIPLES & METHODES 4.1 I/O Buffer Input buffer controls the status between the enable and display of chip. Unless the IC (selected by /CS1, /CS2) is in active mode, input or output of data and instruction does not execute. Therefore internal state is maintained. But /RST can operate regardless the level of /CS1 or /CS2. 4.2 Register Both input register and output register are provided to interface to MPU of which the speed is different from that of internal operation. The selections of these registers depend on the combination of R/W and RS signals. RS L H R/W Function L Instruction H Status read (busy check) L Data write (from input register to display data RAM) H Data read (from display data RAM to output register) 4.2.1 Input Register Input register stores the data temporarily before writing it into display data RAM. When the IC is in active mode, R/W and RS select the input register. The data from MPU is written into input register, then into display data RAM. Data is latched at falling edge of the E signal and then written into the display data RAM automatically by internal operation. 4.2.2 Output Register Output register stores the data temporarily which is read from display data RAM when the IC is in active mode and R/W and RS=H, stored data in display data RAM is latched in output register. When the IC is in active mode and R/W=H, RS=L, status data (busy check) can be read out. To read the contents of display data RAM, twice access of read instruction is needed. In first access, data in display data RAM is latched into output register. In second access, MPU can read data that is latched in output register. That is, to read the data in display data RAM, it needs dummy read. But status read does not need dummy read. The following shows the MPU read timing. LG128642-BMDWH6V -8- RS R/W E Address N N+1 Output Register DB0~DB7 N+2 Data at address N Busy check Write address N Busy Read data check (dumy) Busy check Read data address N Data at address N+1 Busy check Read data address N+1 MPU Read Timing 4.3 Reset The system can be initialized by setting /RST terminal at low level when turning power on. When /RST becomes low, following procedure is occurred. 1. Display off 2. Display start line register is set by 0. (Z-address 0) While /RST is low level, no instruction except status read can be accepted. Reset status appears at DB4 of status byte, after DB4 becomes “L”, any instruction can be accepted. The conditions of power supply at initial power up are shown below. Item Reset time Rise time Symbol Min. Typ. Max. tRS tR 1.0 -- -- Unit μs -- -- 200 ns 4.5V V DD /RST t RS tR 0.7V DD 0.3V DD 4.4 Busy Flag Busy flag indicates the system is now internally operating or not. When busy flag is “H”, the system is in internal operation. When busy flag is “L”, the system can accept data or instruction. Busy flag is read out on DB7 by the Status Read instruction. LG128642-BMDWH6V -9- 4.5 Display On/Off Flip-Flop The display on/off flip-flop makes on/off the liquid crystal display. When flip-flop is reset (logical low), selective voltage or non selective voltage appears on segment output terminals. When flip-flop is set (logical high), non selective voltage appears on segment output terminals regardless of display RAM data. The display on/off flip-flop can change status by instruction. The display data at all segments disappear while /RST is low. The status of the flip-flop is output on DB5 by Status Read instruction. 4.6 X Page Register X page register designates page of the internal display data RAM. Count function is not available. An address is set by instruction. 4.7 Y Address Counter Y address counter designates address of the internal display data RAM. An address is set by instruction and is increased by 1 automatically by read or write operations of display data. 4.8 Display Data RAM Display data RAM stores a display data for liquid crystal display. 1 bit data of this RAM corresponds to light ON (data=1) or light OFF (data=0) of 1 dot on the display panel. 4.9 Display Start Line Register The register specifies a line in display data RAM that corresponds to the top line of LCD panel, when displaying contents in display data RAM on the LCD panel. Bit data (DB<0:5>) of the display start line information is written into this register by display start line set instruction. It is used for scrolling of the liquid crystal display screen. LG128642-BMDWH6V - 10 - 5. DISPLAY CONTROL INSTRUCTIONS The display control instructions control the internal state of the KS0108B. Instruction is received from MPU to KS0108B for the display control. The following table shows various instructions. Instruction Display RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 1 1 1 1 1 Function 0/1 Controls the display on or off. ON/OFF Internal status and display RAM data are not affected. Set Address 0 0 0 1 Y address (0-63) Sets the Y address at the Y address (Y address) Set Page counter. 0 0 1 0 1 1 1 (X address) Display Start 0 0 1 1 Page Sets the X address at the X address (0-7) register. Display start line Line Indicates the display data RAM (0-63) displayed at the top of the screen. (Z address) Status Read 0 1 B 0 O R U N E S / S Y O E F T 0 F 0 0 0 Reads status. BUSY 0: Ready 1: In internal operation ON/OFF 0: Display ON 1: Display OFF RESET 0: Normal 1: Reset Write Display 1 0 Display Data Data Writes data (DB0~DB7) into display data RAM. After writing instruction, Y address is increased by 1 automatically. Read Display Data 1 1 Display Data Reads data (DB0~DB7) from display data RAM to the data bus. LG128642-BMDWH6V - 11 - 5.1 Display On/Off RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 1 1 1 1 1 D The display data appears when D is 1 and disappears when D is 0. Though the data is not on the screen with D=0, it remains in the display data RAM. Therefore, you can make it appear by changing D=0 into D=1. 5.2 Set Address (Y Address) RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 1 AC5 AC4 AC3 AC2 AC1 AC0 Y address (AC0~AC5) of the display data RAM is set in the Y address counter. An address is set by instruction and increased by 1 automatically by read or write operations of display data. 5.3 Set Page (X Address) RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 0 1 1 1 AC2 AC1 AC0 X address (AC0-AC2) of the display data RAM is set in the X address register. Writing or reading to or from MPU is executed in this specified page until the next page is set. 5.4 Display Start Line (Z Address) RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 1 AC5 AC4 AC3 AC2 AC1 AC0 Z address (AC0~AC5) of the display data RAM is set in the display start line register and displayed at the top of the screen. LG128642-BMDWH6V - 12 - 5.5 Status Read • • • RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 1 BUSY 0 ON/OFF RESET 0 0 0 0 BUSY When BUSY is 1, the chip is executing internal operation and no instructions are accepted. When BUSY is 0, the chip is ready to accept any instructions. ON/OFF When ON/OFF is 1, the display is off. When ON/OFF is 0, the display is on. RESET When RESET is 1, the system is being initialized. In this condition, no instructions except status read can be accepted. When RESET is 0, initializing has finished and the system is in the normal operation condition. 5.6 Write Display Data RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 1 0 D7 D6 D5 D4 D3 D2 D1 D0 Write data (D0~D7) into the display data RAM. After writing instruction, Y address is increased by 1 automatically. 5.7 Read Display Data RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 1 1 D7 D6 D5 D4 D3 D2 D1 D0 Read data (D0~D7) from the display data RAM. After reading instruction, Y address is increased by 1 automatically. One time of dummy read must be required after column address setting. LG128642-BMDWH6V 6. DISPLAY DATA RAM ADDRESS MAP 41 42 -- 7D 7E 7F 40 41 42 -- 7D 7E 7F -- -- SEG126 SEG127 SEG128 Segment 40 SEG67 BF SEG66 BE SEG65 BD SEG64 BC SEG63 BB SEG62 BA 2nd KS0108B SEG3 B9 1st KS0108B SEG2 B8 Display Data D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 Column Address SEG1 Page Address Line Address Common C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8 COM9 COM10 COM11 COM12 COM13 COM14 COM15 COM16 COM17 COM18 COM19 COM20 COM21 COM22 COM23 COM24 COM25 COM26 COM27 COM28 COM29 COM30 COM31 COM32 COM33 COM34 COM35 COM36 COM37 COM38 COM39 COM40 COM41 COM42 COM43 COM44 COM45 COM46 COM47 COM48 COM49 COM50 COM51 COM52 COM53 COM54 COM55 COM56 COM57 COM58 COM59 COM60 COM61 COM62 COM63 COM64 - 13 - LG128642-BMDWH6V 7. CONNECTION WITH 8051 FAMILY MPU 8051 LG128642 8 P0.0~P0.7 DB0~DB7 8 74LS373 P2.5~P2.7 A0 A1 A2 A3 RS R/W /CS1 /CS2 Y0 3 74LS138 /RD /WR E RST /RST a. Application Circuit 1 LG128642 8051 8 P1.0~P1.7 DB0~DB7 P3.0 RS P3.1 R/W P3.2 E P3.3 /CS1 P3.4 /CS2 RST /RST b. Application Circuit 2 - 14 - LG128642-BMDWH6V - 15 - 8. ELECTRO—OPTICAL CHARACTERISTICS (Ta=25℃) Item Symbol Condition Min. Typ. Max. Unit Note View Angle Φ2-Φ1 K≥2 , θ=0° -- 70 -- Deg Note1, Note2 Contrast K Φ=0°,θ=0° 3 -- -- -- Note3 tr (rise) Φ=0°,θ=0° -- 250 -- ms Note3 Response Time Φ=0°,θ=0° tf (fall) -- 250 Note1: Definition of Viewing Angle θ,Φ Z( φ =0° ) φ1 Y( θ =180° , φ =-90° ) Top φ2 X' θ X Bottom Y'( θ =0° , φ =+90° ) Note2: Definition of viewing Angle Range: K 2.0 φ1 φ2 Viewing Angle Φ1,Φ2 -- ms LG128642-BMDWH6V Note3: Definition of Contrast K B1 Brightness B2 Driving Voltage Contrast= Brightness of non-selected dot (B1) Brightness of selected dot (B2) Note4: Definition of Response Time Non-selective state tr 10% 90% Selective state 100% Brightness Non-selective state tf Time - 16 - LG128642-BMDWH6V 9. DIMENSIONAL OUTLINE - 17 - LG128642-BMDWH6V - 18 - 10. LCD MODULE NUMBERING SYSTEM L G 128 64 2 ― (1) (2) (3) (1) Brand (2) Module type (4) B M D W H 6 V ― XXX (5) (6) (7) (8) (9) (10) (11) (12) C - Character module G - Graphic module (3) Display format Character module : Number of characters per line, two digits XX Graphic module : Number of columns, tow or three digits XX or XXX (4) Display format Character module : Number of lines, one digit X Graphic module : Number of rows, two or three digits XX or XXX (5) Development number : One digit X ( 1~9, A~Z ) (6) LCD mode (7) T - TN Positive, Gray N - TN Negative, Blue S - STN Positive, Yellow-green G - STN Positive, Gray B - STN Negative, Blue F - FSTN Positive, White K - FSTN Negative, Black L - FSTN Negative, Blue Polarizer mode R - Reflective (8) F - Transflective Backlight type N - Without backlight (9) M - Transmissive L - Array LED D - Edge light LED E - EL C - CCFL Backlight color Y - Yellow-green B - Blue W - White G - Green A - Amber R - Red M - Multi color Nil –Without backlight (10) Operating temperature range S - Standard temperature ( 0 ~ +50 oC ) H - Extended Temperature ( -20 ~ +70 oC ) (11) Viewing direction 3 - 3:00 6 – 6:00 9 – 9:00 U – 12:00 (12) DC-DC Converter N or Nil – Without DC-DC converter (13) Version code 0~ZZZ – Version code V – Built in DC-DC converter (13) LG128642-BMDWH6V - 19 - 11. PRECAUTIONS FOR USE OF LCD MODULE 11.1 Handing Precautions 1) The display panel is made of glass. Do not subject it to a mechanical shock by dropping it from a high place, etc. 2) If the display panel is damaged and the liquid crystal substance inside it leaks out, be sure not to get any in your mouth. If the substance comes into contact with your skin or clothes, promptly wash it off using soap and water. 3) Do not apply excessive force on the surface of display or the adjoining areas of LCD module since this may cause the color tone to vary. 4) The polarizer covering the display surface of the LCD module is soft and easily scratched. Handle this polarizer carefully. 5) If the display surface of LCD module becomes contaminated, blow on the surface and gently wipe it with a soft dry cloth. If it is heavily contaminated, moisten cloth with one of the following solvents. · Isopropyl alcohol · Ethyl alcohol Solvents other than those mentioned above may damage the polarizer. Especially, do not use the following: · Water · Ketone · Aromatic Solvents 6) When mounting the LCD module make sure that it is free of twisting, warping, and distortion. Distortion has great influence upon display quality. Also keep the stiffness enough regarding the outer case. 7) Be sure to avoid any solvent such as flux for soldering never stick to Heat-Seal. Such solvent on Heat-Seal may cause connection problem of heat-Seal and TAB. 8) Do not forcibly pull or bend the TAB I/O terminals. 9) Do not attempt to disassemble or process the LCD module. 10) NC terminal should be open. Do not connect anything. 11) If the logic circuit power is off, do not apply the input signals. 12) 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 module. · 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. 11.2 Storage Precautions LG128642-BMDWH6V - 20 - 1) When storing the LCD module, avoid exposure to direct sunlight or to the light of fluorescent lamps and high temperature/high humidity. Whenever possible, the LCD module should be stored in the same conditions in which they were shipped from our company. 2) Exercise care to minimize corrosion of the electrodes. Corrosion of the electrodes is accelerated by water droplets or a current flow in a high humidity environment. 11.3 Design Precautions 1) The absolute maximum ratings represent the rated value beyond which LCD module can not exceed. When the LCD modules are used in excess of this rated value, their operating characteristics may be adversely affected. 2) To prevent the occurrence of erroneous operation caused by noise, attention must be paid to satisfy VIL, VIH specification values, including taking the precaution of using signal cables that are short. 3) The liquid crystal display exhibits temperature dependency characteristics. Since recognition of the display becomes difficult when the LCD is used outside its designated operating temperature range, be sure to use the LCD within this range. Also, keep in mind that the LCD driving voltage levels necessary for clear displays will vary according to temperature. 4) Sufficiently notice the mutual noise interference occurred by peripheral devices. 5) To cope with EMI, take measures basically on outputting side. 6) If DC is impressed on the liquid crystal display panel, display definition is rapidly deteriorated by the electrochemical reaction that occurs inside the liquid crystal display panel. To eliminate the opportunity of DC impressing, be sure to maintain the AC characteristics of the input signals sent to the LCD Module. 11.4 Others 1) Liquid crystals solidify under low temperatures (below the storage temperature range) leading to defective orientation or the generation of air bubbles (black or white). Air bubbles may also be generated if the LCD module is subjected to a strong shock at a low temperature. 2) 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. A normal operating status can be regained by suspending use for some time. It should be noted that this phenomenon does not adversely affect performance reliability. 3) To minimize the performance degradation of the LCD modules resulting from destruction caused by static electricity, etc., exercise care to avoid touching the following sections when handling the module: · Terminal electrode sections. · Part of pattern wiring on TAB, etc.