USB Type-C
| Pin No | Pin Name | Pin Function |
|---|---|---|
| 1 | VBUS | Main power supply line |
| 2 | DP | Differential data line (positive) |
| 3 | DN | Differential data line (negative) |
| 4 | CC1 | – |
| 5 | CC2 | – |
| 6 | GND | Main ground line |
| 7 | SHLD | Main ground line |
Li-Po Battery Connector (JST-PH 2.0 mm 2-pin)
| Pin No | Pin Name | Pin Function | |
|---|---|---|---|
| 1 | VBAT | Li-Po battery (+) terminal | |
| 2 | GND | Li-Po battery (–) terminal |
I2C Communication Connector (JST-SH 1.0 mm 4-pin)
| Pin No | Pin Name | Pin Function | |
|---|---|---|---|
| 1 | GND | Main ground line | |
| 2 | 3V3 | Regulator output (3.3V) | |
| 3 | SDA | Bidirectional data line | |
| 4 | SCL | Data line clock signal |