Surenoo SLG12864L Series Graphic LCD Module User Manual

1. Order Information

1.1 Order Number

1.2 Image

The document displays an image of the 87*57MM 12864 Graphic LCD Module featuring the ST7565P COG Chip, showing three modules with different display contents, including QR codes.

2. Specification

2.1 Features

2.2 Block Diagram

The block diagram illustrates the connections for the LCD module. It shows the interface signals (/CS1, A0, /WR, /RD, D0-D7, VDD, VSS) connecting to the ST7565P LCD Controller. The controller is then connected to the LCD Panel (128 x 64 DOTS) via COM and SEG lines, and to the LED Backlight via LEDA and VSS. The diagram also indicates internal connections for the controller and the selection between Parallel Mode and Serial Mode using jumpers J2 and J3.

3. Outline Drawing

The outline drawing provides detailed physical dimensions and pin assignments for the SLG12864L series module. Key dimensions include the overall PCB size (87.0±0.5mm width, 57.0±0.5mm height), viewing area (70.0mm width, 37.0mm height), and active area (65.265mm width, 32.625mm height). It details the pin configuration for connectors CN1 (thru-holes) and CN2 (FFC), listing pin numbers 1-20 with their respective symbols (VSS, VDD, LEDA, A0, /CS1, /RES, D7-D0, /WR, /RD, NC) and functions. It also notes that LEDK is connected to VSS on the PCB and that CN3 is a connector type.

4. Electrical Spec

4.1 Pin Configuration

The pin configuration table details the function of each pin on connectors CN1 and CN2:

The interface mode (Parallel or Serial) can be selected using jumpers J2 and J3:

4.2 Absolute Maximum Ratings

Cautions: Stresses above the listed 'absolute maximum ratings' may cause permanent damage to the device. This is a stress rating only, and functional operation under these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

4.3 Electrical Characteristics

4.3.1 DC Characteristics (Ta=25°C)

4.3.2 System Bus Read/Write Characteristics (8080 Series MPU, VDD=3.3V, Ta=25°C)

Note: 1. Input signal rise and fall time (tr, tf) is specified at 15 ns or less. 2. Timing is specified using 20% and 80% of VDD. 3. tCCLW and tCCLR are overlap periods when /CS1 is "L" and /WR (or /RD) is "L".

The Bus Read/Write Timing diagram illustrates the signal sequence for the 8080 series MPU interface, showing the timing relationships between A0, /CS1, /WR, /RD, and data lines (D0-D7) during write and read operations.

4.3.3 Serial Interface (VDD=3.3V, Ta=25°C)

Note: 1. Input signal rise and fall time (tr, tf) is specified at 15 ns or less. 2. Timing is specified using 20% and 80% of VDD.

The Serial Interface Timing diagram illustrates the signal sequence for SPI communication, showing timing for SCL, A0, and SI signals relative to /CS1.

4.3.4 LED Backlight Characteristics (Ta=25°C)

4.3.5 Power Supply for Logic and LED Backlight

The diagram shows the power supply configuration for the LCD module, including VDD, VSS, and the LED backlight circuit with current limiting resistors RL and RE. The table details jumper settings for different VLED values:

5. Inspection Criteria

5.1 Acceptable Quality Level

Each lot must meet the following quality levels:

5.2 Definition of Lot

One lot refers to the total quantity delivered to a customer at one time.

5.3 Condition of Cosmetic Inspection

• INSPECTION AND TEST: FUNCTION TEST, APPEARANCE INSPECTION, PACKING SPECIFICATION.
• INSPECTION CONDITION: Inspect panel appearance under a 20W lamp at a distance of 100mm, with the panel tilted at 45 degrees.
• AQL INSPECTION LEVEL: SAMPLING METHOD: MIL-STD-105D, SAMPLING PLAN: SINGLE. MAJOR DEFECT: 0.4%, MINOR DEFECT: 1.5%, GENERAL LEVEL: II/NORMAL.

5.4 Module Cosmetic Criteria

5.5 Screen Cosmetic Criteria (Non-Operating)

5.6 Screen Cosmetic Criteria (Operating)

Note: (1) Size: d=(long length + short length)/2. (2) Limit samples for each item have priority. (3) Complexed defects are defined item by item, but if the number of defects is defined in the table, the total number should not exceed 10.

6. Precautions for Using

6.1 Handling Precautions

• This device is susceptible to Electro-Static Discharge (ESD) damage. Observe Anti-Static precautions.
• Surenoo display panel is made of glass. Do not subject it to mechanical shock by dropping or impact.
• If the display panel is damaged and liquid crystal substance leaks out, avoid contact with mouth. If it contacts skin or clothes, wash with soap and water.
• Do not apply excessive force to the display surface or adjoining areas, as this may cause color tone variation.
• The polarizer covering the display surface is soft and easily scratched. Handle carefully.
• If the display surface becomes contaminated, breathe on it and gently wipe with a soft dry cloth. For heavy contamination, moisten cloth with Isopropyl alcohol.
• Solvents other than those mentioned may damage the polarizer; do not use water.
• Minimize electrode corrosion. Corrosion is accelerated by water droplets, moisture condensation, or current flow in high-humidity environments.
• Install the module using mounting holes, ensuring it is free of twisting, warping, or distortion. Do not forcibly pull or bend cables.
• Do not attempt to disassemble or process the module.
• NC terminals should be left open.
• If the logic circuit power is off, do not apply input signals.
• To prevent static electricity damage, maintain an optimum work environment: ground your body, use grounded tools (soldering irons), and avoid dry conditions during assembly.
• The module has a protective film; exercise care when peeling it off to avoid static electricity generation.

6.2 Power Supply Precautions

• Always observe absolute maximum ratings for logic and LC drivers, noting potential model variances.
• Prevent reverse polarity to VDD and VSS, even briefly.
• Use a clean power source free from transients; power-up conditions can be jolting and exceed maximum ratings.
• The VDD power of the Surenoo module should also supply power to all devices accessing the display. Do not drive the data bus when the module's logic supply is turned off.

6.3 Operating Precautions

• DO NOT plug or unplug the module while the system is powered up.
• Minimize the cable length between the module and the host MPU.
• For models with backlights, do not disable the backlight by interrupting the HV line, as inverters can produce voltage extremes that may arc.
• Operate the module within its specified temperature limits.

6.4 Mechanical/Environmental Precautions

• Improper soldering is a major cause of module failure. Flux cleaner is not recommended as it may seep under connections and cause failure.
• Mount the module to be free from torque and mechanical stress.
• The graphic panel surface should not be touched or scratched. The front surface is an easily scratched plastic polarizer. Avoid contact and clean only when necessary with soft, absorbent cotton dampened with petroleum benzene.
• Always employ anti-static procedures while handling the module.
• Prevent moisture build-up and observe environmental constraints for storage.
• Do not store in direct sunlight.
• If liquid crystal material leaks, avoid contact, especially ingestion. If contaminated, wash thoroughly with water and soap.

6.5 Storage Precautions

• When storing, avoid exposure to direct sunlight or fluorescent lamps.
• Keep modules in bags, avoiding high temperature/humidity and temperatures below 0°C.
• Store modules in the same conditions as they were shipped.

6.6 Others

• Liquid crystals solidify at low temperatures, potentially causing orientation defects or air bubbles (black or white).
• Operating for long periods with fixed display patterns may result in ghost images and slight contrast irregularity. Normal status can be regained by suspending use. This phenomenon does not adversely affect performance reliability.
• To minimize performance degradation from static electricity, avoid holding exposed areas of the printed circuit board and terminal electrode sections.

7. Using Graphic MODULES

7.1 Liquid Crystal Display Modules

Surenoo Display modules are composed of glass and polarizer. Handle with care:

• Keep within specified temperature range for use and storage to prevent polarization degradation, bubble generation, or polarizer peel-off.
• Do not touch, push, or rub exposed polarizers with anything harder than an HB pencil lead (e.g., glass, tweezers).
• N-hexane is recommended for cleaning adhesives; avoid chemicals like acetone, toluene, ethanol, and isopropyl alcohol, which can damage polarizers and reflectors.
• Wipe dust gently with absorbent cotton or chamois soaked in petroleum benzin. Do not scrub hard to avoid damaging the display surface.
• Wipe off saliva or water drops immediately. Prolonged contact with water may cause deformation or color fading.
• Avoid contact with oil and fats.
• Condensation or contact with terminals due to cold can damage or stain polarizers. Warm up products tested at low temperatures in a container before exposing to room temperature air.
• Do not place or attach anything on the display area to avoid leaving marks.
• Do not touch the display with bare hands, as this can stain the area and degrade insulation between terminals.
• Glass is fragile; avoid dropping, especially on edges.

7.2 Installing Graphic Modules

• Cover the surface with a transparent protective plate to protect the polarizer and LC cell.
• When assembling the LCM into equipment, ensure the spacer provides adequate height to avoid stress on the module surface. Refer to individual specifications for measurements; tolerance should be ±0.1mm.

7.3 Precaution for Handling Graphic Modules

Surenoo LCMs are precision-assembled; avoid excessive shocks or alterations:

• Do not alter, modify, or change the shape of the metal frame tab.
• Do not make extra holes on the PCB, modify its shape, or change component positions.
• Do not damage or modify PCB patterns.
• Do not modify the zebra rubber strip or heat seal connector.
• Except for soldering the interface, do not make alterations with a soldering iron.
• Do not drop, bend, or twist the LCM.

7.4 Electro-Static Discharge Control

As the module uses a CMOS LSI, pay close attention to electrostatic discharge (ESD) precautions:

• Ensure you are grounded when handling LCM.
• Before removing from packaging or incorporating into a set, ensure the module and your body have the same electric potential.
• When soldering terminals, ensure the soldering iron's AC power source does not leak.
• When using electric screwdrivers, ensure they are ground potential to minimize electromagnetic wave transmission.
• Ensure work clothes and workbench are at ground potential.
• Maintain a relative humidity of 50%-60% to reduce static electricity generation.

7.5 Precaution for Soldering to Surenoo LCM

Observe the following for soldering:

• Soldering iron temperature: 280℃±10°C.
• Soldering time: 3-4 seconds.
• Use eutectic solder.
• If flux is used, remove any remaining flux after soldering (except non-halogen types). Protect the panel surface with a cover during soldering to prevent flux spatters.
• When soldering the electroluminescent panel and PC board, do not detach them more than three times.
• When removing the panel from the PC board, ensure solder has completely melted to avoid damaging the PC board pads.

7.6 Precaution for Operation

• Driving the module at voltages above the limit shortens its life.
• Response time is greatly delayed at temperatures below the operating range but will recover when returned to the specified range.
• Pushing the display area hard during operation may cause abnormal display, which can be corrected by turning the unit off and on.
• Condensation on terminals can cause electrochemical reactions. Use under relative humidity of 40°C, 50% RH.
• When powering on, input signals only after positive/negative voltage becomes stable.

7.7 Limited Warranty

Surenoo will replace or repair functionally defective Graphic modules within one year from shipment, provided they are inspected according to Surenoo's acceptance standards. Cosmetic/visual defects must be returned within 90 days of shipment. Warranty liability is limited to repair/replacement; Surenoo is not responsible for subsequent or consequential events.

7.8 Return Policy

No warranty is granted if precautions are disregarded. Typical violations include:

• Broken Graphic glass.
• Damaged or modified PCB eyelets or conductors.
• Circuit modifications.
• PCB tampering (grinding, engraving, painting).
• Soldering to or modifying the bezel.

Module repairs require customer agreement and a description of failures. Customer-installed connectors or cables must be removed without damaging PCB eyelets, conductors, or terminals.

8. Image Sticking

8.1 What is Image Sticking?

Image Sticking (also called "image retention" or "ghosting") is a phenomenon where a faint outline of a previously displayed image remains visible on the screen after the image has changed. It can occur at varying intensities depending on the image makeup and how long core image elements remain unchanged. This is distinct from the "burn-in" effect in phosphor-based devices.

8.2 What causes Image Sticking?

Image sticking is an intrinsic behavior of graphic displays due to the susceptibility of interior materials (liquid crystals) to polarization under static, charged conditions (continuously displaying the same image). Prolonged display of a fixed pattern can cause parasitic charge build-up within the liquid crystals, affecting their optical properties and preventing them from returning to their normal, relaxed state. This can lead to charged crystal alignment or migration within the pixels. The rate of retention depends on factors like image content, display duration, temperature, and panel brand.

8.3 How to Avoid Image Sticking?

• Avoid operating with a "fixed" image for more than 2 hours.
• In elevated temperature environments or with specific display images, image stick can occur in as little as 30 minutes; adjust screen saver settings accordingly.
• Power down the unit during prolonged inactivity (e.g., store closure, unused equipment).
• Use a screensaver with a black or medium gray background that activates after 5-10 minutes of inactivity.
• Avoid placing the monitor in poorly ventilated areas or areas that create excess heat.
• When defining icons or windows, use block patterns instead of distinct lines for borders.
• If a static image is necessary, use colors symmetric to the middle gray level at color boundaries and slightly shift border lines periodically.
• Utilize medium gray hues for areas that will have prolonged display times or remain static while other elements change.

8.4 How to Fix the Image Sticking?

Unlike irreversible "burn-in" effects on CRTs, image retention on graphic displays can often be reversed. Running the screen in an "all black" pattern for 4-6 hours, preferably in an elevated temperature environment (35°C to 50°C), can help erase retained images. Using a dynamic screen saver with an all-black background during idle periods is also recommended.

8.5 Is Image Sticking Covered by Surenoo RMA Warranty?

Image sticking is considered normal operation for graphic display technology. Surenoo does not warrant any display against image sticking. Following the operating recommendations is advised to avoid this phenomenon.

That's the end of the datasheet.