液晶显示模块-TFT液晶屏生产厂家 | 拓普微科技TFT LCD Display Manufacturer and Supplier | Topway Display
User Manual for Topway Display models including: LM12832BCW-A 128x32 Graphic Display Module, LM12832BCW-A, 128x32 Graphic Display Module, Graphic Display Module, Display Module
128x32 Graphic Display Module | Topway Display
File Info : application/pdf, 11 Pages, 337.87KB
DocumentDocumentLM12832BCW-A LCD Module User Manual Prepared by: Gonghuimei Date: 2023-03-28 Checked by: Date: Approved by: Date: Rev. 0.1 0.2 Descriptions Preliminary release Update Ouline Dwg URL: www.topwaydisplay.com Release Date 2021-09-28 2023-03-28 Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 1 of 10 TOPWAY LCD Module User Manual LM12832BCW-A Table of Content 1. Basic Specifications.................................................................................................................. 3 1.1 Display Specifications..................................................................................................................................................... 3 1.2 Mechanical Specifications............................................................................................................................................... 3 1.3 Block Diagram................................................................................................................................................................. 3 1.4 Terminal Functions......................................................................................................................................................... 4 1.5 Backlight Functions......................................................................................................................................................... 4 2. Absolute Maximum Ratings......................................................................................................5 3. Electrical Characteristics.......................................................................................................... 5 3.1 DC Characteristics.......................................................................................................................................................... 5 3.2 LED Backlight Circuit Characteristics.............................................................................................................................5 3.3 AC Characteristics.......................................................................................................................................................... 6 3.4 Reset Timing................................................................................................................................................................... 6 4. Function specifications.............................................................................................................7 4.1 Adjusting the Display Contrast........................................................................................................................................ 7 4.2 Application circuit(Example)............................................................................................................................................ 7 4.3 The Serial Interface......................................................................................................................................................... 7 4.4 Basic Setting................................................................................................................................................................... 7 4.5 Resetting the LCD module.............................................................................................................................................. 8 4.6 Display Memory Map...................................................................................................................................................... 8 4.7 Display Commands......................................................................................................................................................... 9 5. Design and Handling Precaution............................................................................................10 URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 2 of 10 TOPWAY LCD Module User Manual LM12832BCW-A 1. Basic Specifications 1.1 Display Specifications 1) LCD Display Mode 2) Display Color 3) Viewing Angle 4) Driving Method : FSTN, Positive, Transflective : Display Data = "1" : Dark Gray(*1) : Display Data = "0" : Light White (*2) : 6H : 1/33 duty, 1/6 bias Note: *1. Color tone may slightly change by Temperature and Driving Condition. *2. The Color is defined as the inactive / background color *3. Fine Contrast adjustment function is necessary in the application design for optimal display result 1.2 Mechanical Specifications 1) Outline Dimension : 58.0 x 25.5 x 7.8 (mm) (exclude FPC terminal) (See attached Outline Drawing for details) 1.3 Block Diagram URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 3 of 10 TOPWAY LCD Module User Manual LM12832BCW-A 1.4 Terminal Functions PIN NO 1 PIN Name I/O GND Supply Connect to VSS Descriptions 2 /CS1 Input Chip Select /CS=L, enable access to the LCD module /CS=H, disable access to the LCD module 3 /RES Input Reset signal /RES = L, Initialization is executed /RES = H, Normal running. 4 A0 Input Register Select A0 = H, Transferring the Display Data A0 = L, Transferring the Control Data 5 SCL I/O Serial clock input 6 SI I/O Serial data input 7 VDD Supply Positive power supply 8 VSS Supply Negative power supply,0V 9 NC -- No connection 10 NC -- 11 V0 Supply LCD driving voltage for common circuits at negative frame 12 XV0 Supply LCD driving voltage for common circuits at positive frame 13 NC -- 14 NC -- 15 NC -- No connection 16 NC -- 17 NC -- 18 NC -- 19 VG Supply LCD driving voltage for segment circuits 20 NC -- No connection 21 NC -- 22 GND Supply Connect to VSS 1.5 Backlight Functions PIN NO 1 PIN Name I/O Descriptions BLA Supply Backlight Positive power supply 2 BLK Supply Backlight Negative power supply URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 4 of 10 TOPWAY LCD Module User Manual LM12832BCW-A 2. Absolute Maximum Ratings Items Symbol Min. Max. Unit Condition Supply Voltage VDD -0.3 +4.0 V VSS = 0V Input Voltage VIN -0.3 VDD+0.3 V VSS = 0V Operating Temperature TOP -20 +70 C No Condensation Storage Temperature TST -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 Items Operating Voltage Input High Voltage Input Low Voltage Operating Current Symbol VDD VIH VIL IDD MIN. 3.0 0.7xVDD VSS - TYP. 3.3 - 0.2 VSS=0V, VDD=3.3V, TOP=25C MAX. Unit Condition / Application Pin 3.6 V VDD VDD 0.3xVDD V /RES, /CS1, A0, V SCL,SI 0.5 mA VDD 3.2 LED Backlight Circuit Characteristics VBLK=0V,IfBLA=45mA, TOP =25C Items Symbol MIN. TYP. MAX. Unit Applicable Pin Forward Voltage VfBLA - 3.3 - V BLA Forward Current IfBLA - 45 50 mA BLA Cautions: Exceeding the recommended driving current could cause substantial damage to the backlight and shorten its lifetime. BLA BLK No. of LED = 3pcs URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 5 of 10 TOPWAY 3.3 AC Characteristics LCD Module User Manual LM12832BCW-A Item Symbol Serial Clock Period tscyc Address setup time (A0) tsas Address hold time (A0) tsah SCL "H" pulse width tshw SCL "L" pulse width tslw Data setup time tsds Data hold time tsdh CS-SCL time tcss CS-SCL time tcsh Note: *1. Input signal rise/fall time should be less than 15ns . *2. All timing is using 20% and 80% of VDD as the reference. MIN. 50 20 10 25 25 20 10 20 40 3.4 Reset Timing VSS=0V, VDD=3.3V, TOP=25C TYP. MAX. Unit - - ns - - ns - - ns - - ns - - ns - - ns - - ns - - ns - - ns Item Symbol Reset time tr Reset LOW pulse width trw Note: *1.All timing is using 20% and 80% of VDD as the reference. MIN. - 1.0 VSS=0V, VDD=3.3V, TOP=25C TYP. MAX. Unit - 1.0 s - - s URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 6 of 10 TOPWAY LCD Module User Manual LM12832BCW-A 4. Function specifications 4.1 Adjusting the Display Contrast - This LCD module equipped with latest digital contrast adjustment function. - Its display contrast could be adjusted by MCU command. (please see the command tables for details) - It is recommended to provide a contrast adjustment interface for end-user, where the best display result could meet the individual preference in mass production. 4.2 Application circuit(Example) - 4-Wire SPI mode - Using internal ref resistor - C1=0.1uF~1.0uF(25V) - C2=0.1uF~1.0uF(25V) - R1=500K~1M Note: Please refer to the ST7567S data sheet for details. 4.3 The Serial Interface When the serial interface has been selected then when the chip is in active state the serial data input(SI) and the serial clock(SCL) can be received. The serial data is read from the serial data input pin in the rising edge of the serial clock . When "A0"="H", the data is display data, and when "A0"="L", the data is command. 4.4 Basic Setting To drive the LCD module correctly and provide normally display, please use the following setting - MX = 0 (normal) - MY select = 1 (reverse) - LCD Bias Select = 1/6 - Initial Display Line = 0 - Entire Display ON/OFF = OFF (normal) - Reverse Display ON/OFF = OFF (normal) - Set Power Control Set: voltage follower = ON, voltage converter = ON, voltage regulator = ON - Display ON/OFF = ON Note: *1. These setting/commands should issue the LCD module while start up. *2. See the Display Commands section for details. URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 7 of 10 TOPWAY LCD Module User Manual LM12832BCW-A 4.5 Resetting the LCD module The LCD module should be initialized by using /RES terminal. While turning on the VDD and VSS power supply, maintain /RES terminal at LOW level. After the power supply stabilized, release the reset terminal (/RES=HIGH) 4.6 Display Memory Map Page address data LCD Display (front view) D0 0 : D7 D0 1 : D7 D0 2 : 128x32 pixels D7 D0 3 : D7 Column Address 00h 7F Note: *1. MX = 0 (normal) *2. MY Selection = 1 (reverse) *3. Initial Display Line = 0 URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 8 of 10 TOPWAY 4.7 Display Commands INSTRUCTION LCD Module User Manual COMMAND BYTE LM12832BCW-A DESCRIPTION A0 /RD /WR D7 D6 D5 D4 D3 D2 D1 D0 (1) Display ON/OFF 0 10 1 0 1 0 1 1 1 D D=1, display ON D=0, display OFF (2) Set Start Line 0 1 0 0 1 S5 S4 S3 S2 S1 S0 Set display start line (3) Set Page Address 0 1 0 1 0 1 1 Y3 Y2 Y1 Y0 Set page address (4)Set Column Address 0 1 0 0 0 0 1 X7 X6 X5 X4 Set column address (MSB) 0 10 0 0 0 0 X3 X2 X1 X0 Set column address (LSB) (5) Read Status 0 0 1 0 MX D RST 0 0 0 0 Read IC Status (6) Write Data 1 1 0 D7 D6 D5 D4 D3 D2 D1 D0 Write display data to RAM (7) Read Data 1 0 1 D7 D6 D5 D4 D3 D2 D1 D0 Read display data from RAM Set scan direction of SEG (8) SEG Direction 0 10 1 0 1 0 0 0 0 MX MX=1, reverse direction MX=0, normal direction (9) Inverse Display 0 10 1 0 1 0 0 1 1 INV INV =1, inverse display INV =0, normal display (10) All Pixel ON 0 10 1 0 1 0 0 1 0 AP AP=1, set all pixel ON AP=0, normal display (11) Bias Select 0 10 1 0 1 0 0 0 1 BS Select bias setting 0=1/9; 1=1/7 (at 1/65 duty) (12) Read-modify-Write 0 1 0 1 1 1 0 0 0 0 0 Column address increment: Read:+0 , Write:+1 (13) END 0 10 1 1 1 0 1 1 1 0 Exit Read-modify-Write mode (14) RESET 0 10 1 1 1 0 0 0 1 0 Software reset Set output direction of COM (15) COM Direction 0 10 1 1 0 0 MY - - - MY=1, reverse direction MY=0, normal direction (16) Power Control 0 10 0 0 1 0 1 VB VR VF Control built-in power circuit ON/OFF (17) Regulation Ratio 0 1 0 0 0 1 0 0 RP1 RP1 RP0 Select regulation resistor ratio 0 10 1 0 0 0 0 0 0 1 Double command!! Set (18) Set EV 0 1 0 0 0 EV5 EV4 EV3 EV2 EV1 EV0 electronic volume (EV) level 0 10 1 1 1 1 1 0 0 0 Double command!! Set booster level: (19) Set Booster 0 10 0 0 0 0 0 0 0 BL BL=0: 4X BL=1: 5X (20) Power Save 0 10 Compound Command Display OFF + All Pixel ON (21) NOP 0 10 1 1 1 0 0 0 1 1 No operation (22) SPI Read Status 0 1 1 1 1 1 1 1 1 0 0 SPI read status command 0 1 1 0 MX D RST ID3 ID2 ID1 ID0 (23) SPI Read DDRAM 0 1 1 1 1 1 1 1 1 0 1 SPI read DDRAM command 1 1 1 D7 D6 D5 D4 D3 D2 D1 D0 Note: *1. Symbol "-" means this bit can be "H" or "L". *2. For the details of the Display Commands, please refer to ST7567S data sheet. 4.7.1 Power off the LCD Module It recommends that enter Power Save mode before power off the LCD module. 4.7.2 Refreshing The LCD Module It recommends that the operating modes and display contents be refreshed periodically to prevent the effect of unexpected noise. URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 9 of 10 TOPWAY LCD Module User Manual LM12832BCW-A 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 URL: www.topwaydisplay.com Document Name: LM12832BCW-A-Manual-Rev0.2.DOC Page: 10 of 10