4Inch 320*480 TFT Display Module for Raspberry Pi 3B+

| Pin Number | Identification | Description | 
|---|---|---|
| 1, 17 | 3.3V | Power positive (3.3V power input) | 
| 2, 4 | 5V | Power positive (5V power input) | 
| 3, 5, 7, 8, 10, 12, 13, 15, 16 | NC | Not connected | 
| 6, 9, 14, 20, 25 | GND | Power ground | 
| 11 | TP_IRQ | The touch panel is interrupted, and it is detected that the touch panel is pressed low | 
| 18 | LCD_RS | Instruction/data register selection, low level is instruction, high level is data | 
| 19 | LCD_SI / TP_SI | LCD display / touch panel SPI data input | 
| 21 | TP_SO | Touch panel SPI data output | 
| 22 | RST | Reset signal, low reset | 
| 23 | LCD_SCK / TP_SCK | LCD display / touch panel SPI clock signal | 
| 24 | LCD_CS | LCD chip select signal, low level enable | 
| 26 | TP_CS | Touch panel chip select signal, low level enable |