1.28" 240x240 GC9A01 Round OLED LCD Display

1.28" 240x240 GC9A01 Round OLED LCD Display

The 1.28" 240x240 GC9A01 Round OLED LCD Display is a circular LCD display module with a 240×240 pixel resolution, designed for displaying color graphics, indicators, counters, menus, and measurement values ​​in compact electronic projects.

The display features the widely used GC9A01 LCD driver IC. Communication with the microcontroller is established via a 4-wire SPI interface.

Thanks to its SPI architecture, the display can be controlled using fewer GPIO pins compared to parallel displays.

Specifications

• Supply Voltage: 3.3V / 5V
• Display Size: 1.28 inches
• Panel Technology: IPS TFT
• Touch: None
• LCD Driver IC: GC9A01
• Resolution: 240 × 240 pixels
• Color Support: 65K RGB
• Communication Interface: 4-wire SPI
• SPI Data Direction: MOSI for data transfer to the display
• Active Display Area: Ø32.4mm
• Pixel Size: 0.135 × 0.135mm
• Backlight: LED
• Backlight Control: BLK pin
• Module Size: Approx. 36 × 38.8 × 9.4mm
• Mounting: M3 screw / brass spacer connection

Pinout

• GND: Power negative, chassis (ground)
• VCC: Power supply positive, 3.3-5V (must be compatible with communication voltage level)
• SCL: SPI clock signal input port
• SDA: SPI data input port
• RES: Reset, active low
• DC: Data/command selection; low level for command, high level for data
• CS: Chip Select, active low
• BLK: Backlight; low level (when pulled to chassis): off/suspended; pulled up to 3.3V by default