Figure 1. USART in
SPI Mode - Timing Requirements in Host Mode
| Symbol | Description | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| fSCK | SCK clock frequency | Host | - | - | 10 | MHz |
| tSCK | SCK period | Host | 100 | - | - | ns |
| tSCKW | SCK high/low width | Host | - | 0.5 × tSCK | - | ns |
| tSCKR | SCK rise time | Host | - | 2.7 | - | ns |
| tSCKF | SCK fall time | Host | - | 2.7 | - | ns |
| tMIS | MISO setup to SCK | Host | - | 10 | - | ns |
| tMIH | MISO hold after SCK | Host | - | 10 | - | ns |
| tMOS | MOSI setup to SCK | Host | - | 0.5 × tSCK | - | ns |
| tMOH | MOSI hold after SCK | Host | - | 1.0 | - | ns |