12864LCD Module 2.0-inch 3.3V ST7567A

Product Overview and Core Highlights of  12864LCD

Introduction to 12864LCD

This product is a 128×64 dot matrix LCD module manufactured by HOTHMI, model number HTG12864-132.It utilizes the ST7567A driver IC. It features a 6 o’clock optimal viewing direction, supports 1/64 Duty and 1/9 Bias, operates at a voltage of 3.3V, and is equipped with selectable backlight colors (e.g., white/yellow-green, 3.0V/30mA each).

Structurally, the module’s backlight dimensions are 50.20mm x 39.20mm, with an active display area of 40.93mm x 24.93mm and a total thickness of approximately 6.00mm. A 30-pin, 0.50mm pitch FPC cable with a stiffener is attached at the bottom for transmitting interface signals such as CS, RES, and D0-D7. Furthermore, this product operates within a temperature range of -20°C to +70°C and can be stored between -30°C and +80°C, fully compliant with ROHS environmental standards.

Core Highlights at a Glance

• High Clarity and Excellent Visuals: Features a standard 128×64 dot matrix resolution with dot dimensions of 0.29mm x 0.32mm (pitch 0.36mm x 0.39mm), delivering clear and detailed text and graphics within a limited display area.
• Low Power Consumption with Wide Voltage Drive: The module has a typical operating voltage of only 3.3V. Combined with advanced internal boosting and oscillation circuits, overall power consumption is minimized, making it ideal for battery-powered portable devices.
• Superior Environmental Durability: Industrial-grade temperature resistance allows operation from -20°C to +70°C and storage from -30°C to +80°C, easily handling harsh outdoor and industrial environments.
• Compact and Easy-to-Mount Structure: The module’s outline dimensions are just 50.20mm x 39.20mm, with a total thickness of only 6.00mm. The integrated PCB support plate on the back and pre-attached double-sided tape greatly simplify the enclosure assembly process.
• Green and Environmentally Compliant: Fully complies with RoHS directives, making it an ideal choice for high-end markets, including those in Europe and America.

12864LCD Physical Dimensions and Mechanical Specifications

For structural engineers, precise physical dimensions are crucial for PCB and enclosure design. The geometric and physical parameters of this 12864LCD module are as follows:

Backlight Outline Dimensions：50.20 mm × 39.20 mm
Viewing Area (V.A)：44.00 mm × 29.00 mm
Active Area (A.A)：40.93 mm × 24.93 mm
Total Module Thickness：6.00 mm (Max, including backplate and front bezel)
FPC Width：15.50 mm
Pin Pitch：0.50 mm

Comprehensive Interface and Pin Description of 12864LCD

This 12864LCD module connects to a main control board via a 30-pin FPC cable. The cable includes a stiffener to ensure durability and reliable contact during repeated insertions. The detailed pin function table is as follows：

Multi-Interface Bus and Wiring Instructions of 12864LCD

Thanks to the built-in ST7567A controller, this 12864LCD module supports multiple communication bus interfaces. Developers can freely switch communication modes by configuring the logic levels of the hardware pins PS (Pin 29) and C86 (Pin 28).

4-Wire Serial SPI Interface

• Hardware Configuration: Connect PS to low level (VSS).
• Wiring Instructions: This mode uses very few I/O resources on the MCU (e.g., MCU, STM32, Arduino). CS is for chip select, RES for reset, A0 distinguishes between commands and data, WR acts as the serial clock line (SCL), and data is read/written via a designated data channel. This wiring method greatly simplifies mainboard layout.

8080 / 6800 Asynchronous 8-Bit Parallel Interface

• Hardware Configuration: Connect PS to high level (VDD). If C86 is low level, it is in 8080 mode; if C86 is high level, it is in 6800 mode.
• Wiring Instructions: This mode requires a full connection of all 8 data lines (D0 to D7), along with WR (write) and RD (read) control lines. Although it uses more MCU pins, it offers high data throughput and a very high LCD refresh rate, making it ideal for applications like dynamic menus, high-speed waveform graphics, or complex real-time animations.

Display Technology and Optical Design of 12864LCD

This series of 12864 LCD modules offers diverse configurations, featuring options for both FSTN/STN display technologies and Transflective/Transmissive optical modes. This allows engineers to perfectly balance cost, power consumption, and visual performance for various application environments.

Display Technology andVisual Options

• FSTN Positive Option (High Contrast / Black-and-White Visuals): This option incorporates an additional polarization compensation film over the STN layer. It delivers sharp, high-contrast black-and-white graphics when the backlight is on. Utilizing ambient light, it ensures exceptional sunlight readability, making it ideal for high-end devices demanding premium visual quality.
• STN Positive Option (Cost-Effective / Classic Visuals): Utilizing Super-Twisted Nematic technology, this option typically comes in classic Yellow-Green (black characters)or Gray-White (black characters) It offers highly mature reliability and a competitive cost structure, making it the preferred choice for budget-sensitive projects or traditional industrial instrumentation.

Optical Mode Options (Backlight andAmbient Light Adaptability)

• Transflective Mode (Indoor/Outdoor Versatility and Low Power):
  This mode combines both reflective andtransmissive optical characteristics. In bright outdoor environments or direct sunlight, it leverages ambient reflected light to maintain excellent readability, allowing the backlight to be turned off completely for ultimate energy saving. In low-light or pitch-black conditions, turning on the integrated white LED backlight delivers a crisp, high-contrast display. This is the optimal configuration for handheld portable devices and outdoor metering instruments.
• Transmissive Mode (High Brightness / Indoor Dominated):
  This mode allows light to pass strictly through the liquid crystal layers from the back. It relies entirely on the backlightfor visibility; if the backlight is turned off, the screen content becomes unreadable. The core advantage of this mode is its highly efficient backlight utilization, yielding significantly higher display brightness and better visual uniformity. It is ideal for mains-powered, continuously on indoor equipment, such as industrial central control consoles and smart home panels.

Shared Mechanical and Optical Characteristics

Regardless of the chosen material and optical configuration, the optimal viewing direction is fixed at the 6 o’clock position. This angle is perfectly tailored for most eye-level or slightly upward instrument installations and control panel assemblies.

Wide Range of Application Scenarios for 12864LCD

Due to its ultra-low power consumption, excellent sunlight readability, and ability to freely draw dot-matrix graphics and display text from various fonts, this 12864LCD module is widely used across many industries, including:

• Intelligent Industrial Control Instruments: CNC machine control panels, industrial thermostats, PLC expansion display modules, inverter operator panels.
• Power and New Energy Monitoring: Smart meters, data concentrators, solar inverter displays, EV charging station status terminals.
• Portable Measurement Instruments: Handheld multimeters, infrared thermometers, air quality monitors, gas analyzers, distance meters.
• Medical and Health Devices: Home blood pressure monitors, blood glucose meters, portable ventilator display panels, beauty device controllers.
• Smart Home and Security: Smart door access master stations, central air conditioning wired controllers, home water purifier status screens.

12864LCD Technical Q&A and Common Troubleshooting

Q1: Does the ST7567A driver for this 12864LCD require external charge pump capacitors?

A1: No, it does not require external boosting diodes. The ST7567A integrates an efficient oscillator and DC-DC charge pump circuit. You simply need to connect a 0.1uF to 1uF high-frequency ceramic filter capacitor from each of the V0, XV0, VG, and other LCD driver pins to ground (VSS) to generate the necessary internal high voltage drive bias for the LCD.

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