This is a 1.8-inch ST7735-based TFT LCD module for displaying text, graphics, and simple UI elements. It typically uses an SPI interface for the display signals, with separate control pins such as CS, DC, and RESET, and it may also include backlight control plus optional microSD card SPI pins.
| Pin | Signal | Description |
|---|---|---|
CS |
chip-select | SPI chip-select for the ST7735 display controller, usually active low. |
GND |
ground | Ground reference for power and SPI signals. |
LED |
PWM | Backlight LED power/control input; drive or PWM to control brightness. |
SCK |
SCK | SPI clock input for shifting display data into the controller. |
SDA |
MOSI | SPI MOSI data input to the ST7735 display controller. |
VCC |
power | Power input for the TFT module, typically 3.3–5V depending on breakout regulator. |
RESET |
reset | Hardware reset input for the display controller, typically active low. |
A0 |
digital | Data/command select line for the display, also commonly labeled DC. |
SD_CS |
chip-select | SPI chip-select for the microSD card socket, usually active low. |
SD_MOSI |
MOSI | SPI MOSI data line to the microSD card. |
SD_MISO |
MISO | SPI MISO data line from the microSD card. |
SD_SCK |
SCK | SPI clock line for the microSD card socket. |
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