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LM3121B Dataheets PDF



Part Number LM3121B
Manufacturers TOPWAY
Logo TOPWAY
Description LCD
Datasheet LM3121B DatasheetLM3121B Datasheet (PDF)

LM3121B LCD Module User Manual Prepared by: K.C. Date: 2009-07-20 Checked by: Date: Approved by: Date: Rev. Descriptions 0.1 Preliminary Release URL: www.topwaydisplay.com www.topwaysz.com Release Date 2009-07-20 Document Name: LM3121B-Manual-Rev0.1.DOC Page: 1 of 9 TOPWAY Table of Content LCD Module User Manual LM3121B 1. Basic Specifications.. 3 1.1 Display Specifications .....

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LM3121B LCD Module User Manual Prepared by: K.C. Date: 2009-07-20 Checked by: Date: Approved by: Date: Rev. Descriptions 0.1 Preliminary Release URL: www.topwaydisplay.com www.topwaysz.com Release Date 2009-07-20 Document Name: LM3121B-Manual-Rev0.1.DOC Page: 1 of 9 TOPWAY Table of Content LCD Module User Manual LM3121B 1. Basic Specifications................................................................................................................ 3 1.1 Display Specifications ............................................................................................................................................ 3 1.2 Mechanical Specifications...................................................................................................................................... 3 1.3 Block Diagram........................................................................................................................................................ 3 1.4 Terminal 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 4. Function Specifications .......................................................................................................... 7 4.1 Basic Setting .......................................................................................................................................................... 7 4.2 Resetting the LCD module ..................................................................................................................................... 7 4.3 Adjusting the LCD Display Contrast ....................................................................................................................... 7 4.4 Display Data RAM Memory Map ............................................................................................................................ 8 4.5 Display Command.................................................................................................................................................. 8 5. Design and Handling Precaution ........................................................................................... 9 URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM3121B-Manual-Rev0.1.DOC Page: 2 of 9 TOPWAY LCD Module User Manual 1. Basic Specifications 1.1 Display Specifications 1) LCD Display Mode 2) Display Color 3) Viewing Angle 4) Driving Method 5) Back Light : FSTN, Negative, Transmissive : Display Data = “1” : Light Gray (*1) : Display Data = “0” : Dark Gray (*2) :6H : 1/32 duty, 1/5bias : 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 : 231.0 x 53.6 x 12.5MAX (see attached Outline Drawing for details) 1.3 Block Diagram BLA BLK LED Backlight Circuit LCD Panel 202 x 32 pixels LM3121B LCD Power & Booster Circuit V0 VDD VSS DB0 - DB7 R/W, A0 E1 E2 E3 /RES SED1520 or equivalent SED1521 or equivalent SED1520 or equivalent URL: www.topwaydisplay.com www.topwaysz.com Document Name: LM3121B-Manual-Rev0.1.DOC Page: 3 of 9 TOPWAY LCD Module User Manual LM3121B 1.4 Terminal Functions Pin Pin No. 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 Power LCD Booster Output for V0 5 /RES Input Reset signal (*2) Resetting: rising edge and falling edge of RES Normal Running: /RES=High 6 DB7 I/O Bi-directional Data Bus for display data or instruction data :: 13 DB0 14 R/W Input Read /Write Control Signal 15 A0 Input A0 = H; DB0 – DB7 = Display Data A0 = L; DB0 – DB7 = Instruction Data 16 E1 Input Enable Signal for left section of the LCD module 17 E2 Input Enable Signal for middle section of the LCD module 18 E3 Input Enable Signal for right section of the LCD module 19 BLA Power Positive Power for LED backlight 20 BLK Power Negative Power for LED backlight Note: *1. Display or instruction data could write into the LCD module’s driver/controllers .


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