| 1 | RESET | - | Device reset |
| 2 | OP_MODE | Input | Capacitive or Conductive mode selection
|
| 3 | SLP_PER | Input | Sleep period or wake-up request
selection |
| 4 | THR | Input | Liquid detection threshold |
| 5 | CFG_EN | Input | Enhanced configuration mode
enable |
| 6 | SYS_LK | Input | System lock enable |
| 7 | S_CAP | Input | Capacitive electrode input |
| 8 | NC | - | Not connected |
| 9 | TX | Output | Serial data transmission |
| 10 | RX | Input | Serial data receive |
| 11 | WU | Input | Wake-up request |
| 12 | OUT | Output | Liquid detection alarm |
| 13 | HB | Output | Heartbeat signal |
| 14 | NC | - | Not connected |
| 15 | UART_EN | Input | Extended output enable |
| 16 | NC | - | Not connected |
| 17 | VSS | - | Power supply GND |
| 18 | VDD | - | Power supply (+) |
| 19 | S_CON2 | Input | Conductive electrode input 2 |
| 20 | S_CON1 | Input | Conductive electrode input 1 |
