36.14 SPI

Figure 36-4. SPI - Timing Requirements in Host Mode

Table 36-19. SPI - Timing Specifications in Host Mode
Symbol	Description	Min.	Typ.✝	Max.	Unit
f_SCK *	SCK clock frequency	—	—	f_{CLK_PER} / 2	MHz
T_SCK *	SCK period	2 × T_{CLK_PER}	—	—	ns
t_SCKW	SCK high/low width	—	0.5 × T_SCK	—	ns
t_SCKR	SCK rise time	—	2.7	—	ns
t_SCKF	SCK fall time	—	2.7	—	ns
t_MIS	MISO setup to SCK	—	10	—	ns
t_MIH	MISO hold after SCK	—	10	—	ns
t_MOS	MOSI setup to SCK	—	0.5 × T_SCK	—	ns
t_MOH	MOSI valid after SCK	—	1	—	ns
✝ Unless otherwise specified, data in the “Typ.” column is at T_A = 25°C and V_DD = 3.0V . These parameters are not tested and are for design guidance only. * These parameters are characterized but not tested in production.

Figure 36-5. SPI - Timing Requirements in Client Mode

Table 36-20. SPI - Timing Specifications in Client Mode
Symbol	Description	Min.	Typ.✝	Max.	Unit
f_SSCK *	Client SCK clock frequency	—	—	f_{CLK_PER} / 6	MHz
T_SSCK *	Client SCK period	6 × T_{CLK_PER}	—	—	ns
t_SSCKW *	SCK high/low width	2 × T_{CLK_PER}	—	—	ns
t_SIS *	MOSI setup to SCK	—	0	—	ns
t_SIH *	MOSI hold after SCK	3 × T_{CLK_PER}	—	—	ns
t_SSS *	SS low before SCK	21	—	—	ns
t_SSH *	SS high after SCK	20	—	—	ns
t_SOS	MISO valid after SCK	—	8	—	ns
t_SOSS	MISO valid after SS low	—	11	—	ns
t_SOSH	MISO disable time after SS high	—	8	—	ns
✝ Unless otherwise specified, data in the “Typ.” column is at T_A = 25°C and V_DD = 3.0V . These parameters are not tested and are for design guidance only. * These parameters are characterized but not tested in production.