40.5 Signal Description
| Pin Name | Pin Description | Type | |
|---|---|---|---|
| Host | Client | ||
| MISO | Host In Client Out | Input | Output | 
| MOSI | Host Out Client In | Output | Input | 
| SPCK | Serial Clock | Output | Input | 
| NPCS1–NPCS3 | Peripheral Chip Selects | Output | Unused | 
| NPCS0/NSS | Peripheral Chip Select/Client Select | Output | Input | 
