LM6800 TOPWAY | Alldatasheet
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Technical content
URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 1 of 10 LM6800 LCD Module User Manual Shenzhen TOPWAY Technology Co., Ltd. Rev. Descriptions Release Date
0.1 Preliminary New release 2004-03-17
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 2 of 10 Table of Content
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 3 of 10 1. Basic Specifications
1.1 Display Specifications
1) LCD Display Mode : STN, Positive, Transmissive 2) Display Color : Display Data = “1” : Deep Blue (*1) : Display Data = “0” : Light Gray (*2) 3) Viewing Angle : 6 H 4) Driving Method : 1/64 duty, 1/9bias 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 : 137.0 x 39.6.0 x 12.8MAX (see attached Outline Drawing for details)
1.3 Block Diagram
RS, R/W, E, /RST VSS SEG1 SEG64 S6B0107 or equivalent COM1 COM64 DB0 - DB7 S6B0108 or equivalent SEG1 SEG64 S6B0108 or equivalent SEG1 SEG64 CSA, CSB, CSC Power and LCD Booster Circuit LED Backlight Circuit VDD BLA S6B0108 or equivalent SEG1 SEG64 VOUT
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 4 of 10
1.4 Terminal Functions
No. Pin Name I/O Descriptions
1 VSS Power Negative Power Supply, Ground (0V)
2 VDD Power Positive Power Supply
3 V0 Input LCD Contrast reference
4 VOUT Output Power Booster output for V0
5 RS Input RS = H; DB0 – DB7 = Display RAM data
RS = L; DB0 – DB7 = Instruction data
6 R/W Input
7 E Input
R/W = H; Data read form the LCD module, data appears at DB0 – DB7 and can be read by the host while, E = H and the device is being selected In write mode R/W = L; Data write to the LCD module, data appears at DB0 – DB7 will be written into the LCD module at E = HÆL and device is being selected
8 DB0 I/O
: : :
15 DB7 I/O
Data bus: Three state I/O terminal for display data or instruction data
16 CSA Input
17 CSB Input
18 CSC Input
Chip selection, enable access to each section of the LCD module CSC CSB CSA Function 0 0 0 Enable access of the Left-Most Section (64 column) of the LCD module 0 0 1 Enable access of the Middle-Left Section (64 column) of the LCD module 0 1 0 Enable access to the Middle-Right Section (64 column) of the LCD module 0 1 1 Enable access to the Right-Most Section (64 column) of the LCD module 1 x x Disable all the access to the LCD module 19 /RST Input Reset signal /RST = L, Display off display start line register becomes 0 no command or instruction data could be accepted /RST = H, Normal running
20 BLA Power Positive Power Supply for LED backlight
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 5 of 10 2. Absolute Maximum Ratings Items Symbol Min. Max. Unit Condition Supply Voltage V DD 0 7.0 V V SS = 0V Operating Temperature T OP -20 70 °C No Condensation Storage Temperature T ST -30 80 °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 implied and prolonged exposure to extreme conditions may affect device reliability. 3. Electrical Characteristics
3.1 DC Characteristics
VSS=0V, VDD =5V, TOP =25°C Items Symbol MIN. TYP. MAX. Unit Applicable Pin Operating Voltage V DD 4.8 5.0 5.2 V VDD Input High Voltage V IH 3.5 - V DD V Input Low Voltage V IL 0 - 0.4 V RS, R/W, E, DB0-DB7 CSA, CSB, CSC Operating Current I DD - 6.0 18 mA VDD, VSS
3.2 LED Backlight Circuit Characteristics
VSS=0V, IfBLA=120mA, TOP =25°C Items Symbol MIN. TYP. MAX. Unit Applicable Pin Forward Voltage Vf BLA - 5.0 - V BLA Forward Current If BLA - - 150 mA BLA VSS BLA
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 6 of 10
3.3 AC Characteristics
VSS=0V, VDD =5V, TOP =25°C Item Symbol MIN. TYP. MAX. Unit E cycle time tc 1500 - - ns E high level width twh 700 - - ns E low level width twl 700 - - ns E rise time tr - - 18 ns E fall time tf - - 18 ns Address set-up time tasu 240 - - ns Address hold time tah 50 - - ns Data set-up time tdsu 300 - - ns Data delay time td - - 480 ns Data hold time (write) tdhw 15 - - ns Data hold time (read) tdhr 30 - - ns Host Write Timing Diagram Host Read Timing Diagram
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 7 of 10 4. Function Specifications
4.1 Basic Setting
To drive the LCD module correctly and provide normally display, please use the following setting Display start line (Z address)= 0 LCD Display = on Note: These setting/commands should issue to all controllers while start up. See the Display Control Instructions section for details.
4.2 Adjusting the LCD display contrast
A Variable-Resistor must be connected to the LCD module for providing a reference to V0. Adjusting the VR will result the change of LCD display contrast. The recommended value of VR is 25k to 50k
4.3 Resetting the LCD module
The LCD module should be initialized by setting /RST terminal at low level when turning the power on. When /RST pull low, the LCD module will: - Display off - Display start line register becomes 0. (Z-address=0) While /RST is low, no instruction can be accepted except status read. Therefore, execute other instructions after making sure that DB4=0 (clear /RST) and DB7=0 (ready) by status read instruction. The conditions of power supply at initial power up are as follow: Item Symbol MIN. TYP. MAX. Unit Reset time trs 2.0 - - us Rise time tr - - 150 ns LCD Module VDD VOUT
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 8 of 10
4.4 Display Memory Map
Page (X) address data LCD Display (front view) Column(Y) Address 00h Æ 3Fh 00h Æ 3Fh 00h Æ 3Fh 00h Æ 3Fh Chip Select CSA 0 1 0 1 Chip Select CSB 0 0 1 1 Chip Select CSC 0 0 0 0 Note: 1) Display start line (Z address) = 0 2) The Display Data store separately in four drivers.
4.5 Internal Registers
There are three registers in each section of LCD module. Each of them could be controlled independently. Page (X) Address Register X address register designates pages of the internal display data RAM. Count function is not available. The address should set by instruction. Column (Y) Address Counter Y address counter designates address of the internal display data RAM. It could be set by instruction and increased by 1 automatically by read or write display data operations. Display Start Line (Z) Register Z address register indicates of display data RAM to LCD top line. It may be used for scrolling the display pattern on the LCD. 256x64 pixels
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 9 of 10
4.6 Display Control Instructions
Display on/off 0 0 0 0 1 1 1 1 1 1/0 Controls the display on or off. Internal status and display data in RAM is not affected 0=off, 1=on Set Column (Y) Address 0 0 0 1 Y address (0-63) Set the Column address into the Y address counter Set Page (X) Address 0 0 1 0 1 1 1 X address (0-7) Set the Page address into the X address register Set Display Start Line (Z address) 0 0 1 1 Z address (0-63) Indicates the display data RAM displayed at the top of the screen Status Read 0 1 Busy 0 on/off Reset 0 000 Read status Busy=L, Driver ready; Busy=H, Driver busy on/off=L, Display is on; on/off=H, Display is off Reset=L, Normal Running; Reset=H, reset Write Display Data 1 0 Write data Write display data into display data RAM, After writing instruction, Y address counter increased by 1 automatically Read Display Data 1 1 Read data Read display data form the display data RAM Note: *1. For the details of the Display Control Instructions, please refer to Samsung S6B0108 handbook.
TOPWAY LCD Module User Manual LM6800 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM6800-Manual-Rev0.1.doc Page: 10 of 10 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