| Interface definition | ||
| Pin No. | Symbol | Description |
| 1, 17 | 3.3V | Power supply + (3.3V power input) |
| 2, 4 | 5V | Power supply + (5V power input) |
| 3, 5, 7, 8, 10, 22 | NC | NC |
| 6, 9, 14, 20, 25 | GND | Ground |
| 11 | TP_IRQ | Touch Panel interrupt, low level while the Touch Panel detects touching |
| 12 | KEY1 | Button |
| 13 | RST | Reset |
| 15 | LCD_RS | LCD command control, command / data register select |
| 16 | KEY2 | Button |
| 18 | KEY3 | Button |
| 19 | LCD_SI/TP_SCK | LCD display / touch panel SPI data input |
| 21 | TP_SO | Touch panel SPI data input |
| 23 | LCD_SCK/TP_SCK | LCD display / touch panel SPI clock signal |
| 24 | LCD_CS | LCD chip select signals, low-level selection LCD |
| 26 | TP_CS | Touch panel chip select signal, choose low touch panel |
