NORITAKE ITRON VFD MODULES GU128x18F-K612A4 is a high brightness dot graphic VFD module. It features single 5V DC supply, 3 ASCII fonts (5 x 5, 5 x 7 and 10 x 14), SPI & RS232 Asynchronous Serial Interface, 8 User I/O Pins with Key Scanning Capability, Transformerless PSU (patent pending) and Low Profile Design.
The Noritake Itron GU128x18F-K612A4 is a 128 × 18 dot‑graphic VFD module powered by a single 5 V DC supply. It provides three ASCII fonts, RS232 and SPI serial interfaces, eight user I/O pins, and a transformer‑less DC/DC converter. The document lists electrical, optical, and environmental specifications, as well as detailed software command tables for controlling the display.
The manual also describes asynchronous and synchronous communication methods, I/O pin handling, macro programming, checksum verification, and EEPROM protection. Example command sequences illustrate how to display text, graphics, and progress bars, and how to configure baud rate, parity, and key‑scanning features.
| Power Supply Voltage | 5.0 VDC ±10% |
|---|---|
| Power Supply Current | 300 mA typ. |
| RS232 Input Voltage Range | -24 V max / +24 V max |
| Display Area | 83.05 × 13.69 mm |
| Dot Size / Pitch | 0.5 × 0.6 mm (5 × 5) / 0.65 × 0.77 mm (10 × 14) |
| Luminance | 700 cd/m² |
| Operating Temperature | -40 °C to +85 °C |
| Operating Humidity | 20 % to 85 % RH @ 25 °C |
| I/O Output Current Capability | source ~5 mA, sink ~30 mA |
| I/O Input Pull‑up Resistor | 30 kΩ – 120 kΩ |
The module defaults to 19200 baud with no parity.
Three ASCII fonts are provided: 5 × 5, 5 × 7, and 10 × 14 pixel fonts.
Applying a low‑level signal to the /RES pin resets the module and restores power‑on defaults.
The VDD pin requires a 5.0 V DC supply (±10%).