This is a 2.8-inch TFT LCD module based on the ILI9341 controller, commonly used to display text, graphics, and simple user interfaces. It typically connects over an SPI interface with control pins like CS, DC, SCK, MOSI, and RESET, and many variants also include resistive touch and microSD card connections.
| Pin | Signal | Description |
|---|---|---|
CS |
chip-select | Chip-select for the ILI9341 display SPI interface, typically active low. |
DC |
digital | Data/command select for the display; selects command or pixel data mode. |
GND |
ground | Ground reference for display, touch, backlight, and logic signals. |
SCK |
SCK | SPI clock input for the ILI9341 display controller. |
VCC |
power | Power input for the TFT module logic and onboard circuitry. |
LED |
PWM | Display backlight supply/control input; drive high or PWM to control brightness. |
MOSI |
MOSI | SPI data input to the ILI9341 display controller. |
RESET |
reset | Hardware reset input for the display controller, usually active low. |
MISO |
MISO | LCD SPI data output to the host; often unused on write-only display setups. |
T_CS |
chip-select | Chip-select for the resistive touch controller, typically active low. |
T_DO |
MISO | Touch controller SPI MISO data output to the host. |
T_CLK |
SCK | SPI clock input for the touch controller. |
T_DIN |
MOSI | Touch controller SPI MOSI data input from the host. |
T_IRQ |
interrupt | Touch controller interrupt output, usually goes low when the screen is touched. |
SD_CS |
chip-select | Chip-select for the microSD card SPI interface, typically active low. |
SD_MISO |
MISO | SPI data from the microSD card to the controller. |
SD_SCK |
SCK | SPI clock for the microSD card interface. |
SD_MOSI |
MOSI | SPI data from the controller to the microSD card. |
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