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5.40 eUSCI (SPI Slave Mode)

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)⁽¹⁾

PARAMETER		TEST CONDITIONS	V_CC	MIN	MAX	UNIT
t_STE,LEAD	STE lead time, STE low to clock		2 V	4		ns
t_STE,LEAD	STE lead time, STE low to clock		3 V	3		ns
t_STE,LAG	STE lag time, Last clock to STE high		2 V	0		ns
t_STE,LAG	STE lag time, Last clock to STE high		3 V	0		ns
t_STE,ACC	STE access time, STE low to SOMI data out		2 V		46	ns
t_STE,ACC	STE access time, STE low to SOMI data out		3 V		24	ns
t_STE,DIS	STE disable time, STE high to SOMI high impedance		2 V		38	ns
t_STE,DIS	STE disable time, STE high to SOMI high impedance		3 V		25	ns
t_SU,SI	SIMO input data setup time		2 V	2		ns
t_SU,SI	SIMO input data setup time		3 V	1		ns
t_HD,SI	SIMO input data hold time		2 V	2		ns
t_HD,SI	SIMO input data hold time		3 V	2		ns
t_VALID,SO	SOMI output data valid time⁽²⁾	UCLK edge to SOMI valid, C_L = 20 pF	2 V		55	ns
t_VALID,SO	SOMI output data valid time⁽²⁾	UCLK edge to SOMI valid, C_L = 20 pF	3 V		32	ns
t_HD,SO	SOMI output data hold time⁽³⁾	C_L = 20 pF	2 V	24		ns
t_HD,SO	SOMI output data hold time⁽³⁾	C_L = 20 pF	3 V	16		ns

(1) f_UCxCLK = 1/2t_LO/HI with t_LO/HI ≥ max(t_{VALID,MO(Master)} + t_SU,SI(eUSCI), t_{SU,MI(Master)} + t_{VALID,SO(eUSCI)})
For the master parameters t_{SU,MI(Master)} and t_{VALID,MO(Master)}, see the SPI parameters of the attached master.

(2) Specifies the time to drive the next valid data to the SOMI output after the output changing UCLK clock edge. See the timing diagrams in Figure 5-13 and Figure 5-14.

(3) Specifies how long data on the SOMI output is valid after the output changing UCLK clock edge. See the timing diagrams in Figure 5-13 and Figure 5-14.

MSP430F6779 MSP430F6778 MSP430F6777 MSP430F6776 MSP430F6775 MSP430F6769 MSP430F6768 MSP430F6767 MSP430F6766 MSP430F6765 MSP430F6749 MSP430F6748 MSP430F6747 MSP430F6746 MSP430F6745 slas639-eUSCI_slave_CKPH0.gif

Figure 5-13 SPI Slave Mode, CKPH = 0

Figure 5-14 SPI Slave Mode, CKPH = 1

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5.40 eUSCI (SPI Slave Mode)