7.3.3 SPI Interface Timing

Table 7-6. AC Characteristics of SPI InterfaceApplicable over the recommended operating range from T_A = -40°C to +125°C, V_CC = +2.7V to +5.5V.
Parameters	Symbol	Min.	Max.	Units
SCK Clock Frequency	f_SCK	—	16	MHz
SCK High Time	t_WH	20	—	ns
SCK Low Time	t_WL	25	—	ns
CS High Time	t_CS	100	—	ns
CS Setup Time	t_CSS	100	—	ns
CS Hold Time	t_CSH	100	—	ns
Data in Setup Time	t_SU	5	—	ns
Data in Hold Time	t_H	5	—	ns
Input Rise Time^{(1, 2)}	t_RI	—	2	μs
Input Fall Time^{(1, 2)}	t_FI	—	2	μs
Output Valid	t_V	—	25	ns
Output Hold Time	t_HO	0	—	ns
Output Disable Time	t_DIS	—	25	ns

Note:

Values are based on characterization and are not production tested.
System designers must ensure that all AC parametrics are met, which will typically require rise and fall times faster than these values for most clock rates. Ramp rates slower than this may result in improper operation.

Figure 7-2. SPI Mode 0 Synchronous Data Timing

Figure 7-3. SPI Mode 3 Synchronous Data Timing