The Nokia 5110 LCD module is a 84×48 pixel monochrome display using the PCD8544 controller, originally from Nokia phones. Communicates via SPI at 3.3V logic and is popular for low-power display applications.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | RST | Reset, active low | I/O |
| 2 | CE | Chip enable, SPI select | BUS |
| 3 | DC | Data/command select | I/O |
| 4 | DIN | SPI data input (MOSI) | BUS |
| 5 | CLK | SPI clock | BUS |
| 6 | VCC | 2.7V–3.3V power | PWR |
| 7 | BL | Backlight, connect to 3.3V via 330R | I/O |
| 8 | GND | Ground | GND |