39.5.5 USART

Figure 39-3. USART in SPI Mode - Timing Requirements in Host Mode
Table 39-19. USART in SPI Host Mode - Timing Characteristics
SymbolDescriptionMin.Typ.Max.UnitCondition
fSCKSCK clock frequency——10MHz
TSCKSCK period100——ns
tSCKWSCK high/low width—0.5×TSCK—ns
tSCKRSCK rise time—2.7—ns
tSCKFSCK fall time—2.7—ns
tMISMISO setup to SCK—10—ns
tMIHMISO hold after SCK—10—ns
tMOSMOSI setup to SCK—0.5×TSCK—ns
tMOHMOSI hold after SCK—1.0—ns