| Signal | Description | Type | |
|---|---|---|---|
| Master Mode | Slave Mode | ||
| MOSI | Master Out Slave In | User defined output | Input |
| MISO | Master In Slave Out | Input | User defined output |
| SCK | Slave clock (generated by master) | User defined output | Input |
| SS | Slave select (generated by master) | User defined output | Input |