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