Nintendo Switch game cards use a 40-pin slot with custom encryption and a bitter coating to discourage children from putting them in their mouths. The interface uses a proprietary high-speed serial bus.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | GND | Ground | GND |
| 2 | VCC | 3.3V supply | PWR |
| 3-38 | Data/Signal | Proprietary serial data and control | BUS |
| 39 | NC | Not connected | I/O |
| 40 | GND | Ground | GND |
Nintendo Switch game cards use a 40-pin slot with custom encryption and a bitter coating to discourage children from putting them in their mouths. The interface uses a proprietary high-speed serial bus.