MSP430F551X Datasheet, PDF (65/115 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F551x
MSP430F552x
www.ti.com
SLAS590D – OCTOBER 2009 – REVISED APRIL 2010
USCI (SPI Master Mode) - recommended operating conditions
PARAMETER
CONDITIONS
V_CC
f_USCI
USCI input clock frequency
Internal: SMCLK, ACLK
Duty cycle = 50% ± 10%
MIN TYP MAX UNIT
f_SYSTEM MHz
USCI (SPI Master Mode)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
(see Note ⁽¹⁾, Figure 11 and Figure 12)
f_USCI
PARAMETER
USCI input clock frequency
TEST CONDITIONS
SMCLK, ACLK
Duty cycle = 50% ± 10%
V_CC
MIN TYP MAX UNIT
f_SYSTEM MHz
1.8 V
55
PMMCOREV = 0
ns
3.0 V
38
t_SU,MI
SOMI input data setup time
2.4 V
30
PMMCOREV = 3
ns
3.0 V
25
1.8 V
0
PMMCOREV = 0
ns
3.0 V
0
t_HD,MI
SOMI input data hold time
2.4 V
0
PMMCOREV = 3
ns
3.0 V
0
t_VALID,MO SIMO output data valid time⁽²⁾
UCLK edge to SIMO valid,
C_L = 20 pF
PMMCOREV = 0
UCLK edge to SIMO valid,
C_L = 20 pF
PMMCOREV = 3
1.8 V
3.0 V
2.4 V
3.0 V
20
ns
18
16
ns
15
t_HD,MO
SIMO output data hold time⁽³⁾
C_L = 20 pF
PMMCOREV = 0
C_L = 20 pF
PMMCOREV = 3
1.8 V
-10
3.0 V
-8
2.4 V
-10
3.0 V
-8
ns
ns
(1) f_UCxCLK = 1/2t_LO/HI with t_LO/HI ≥ max(t_{VALID,MO(USCI)} + t_SU,SI(Slave), t_SU,MI(USCI) + t_{VALID,SO(Slave)}).
For the slave's parameters t_SU,SI(Slave) and t_{VALID,SO(Slave)} refer to the SPI parameters of the attached slave.
(2) Specifies the time to drive the next valid data to the SIMO output after the output changing UCLK clock edge. Refer to the timing
diagrams in Figure 11 and Figure 12.
(3) Specifies how long data on the SIMO output is valid after the output changing UCLK clock edge. Negative values indicate that the data
on the SIMO output can become invalid before the output changing clock edge observed on UCLK. Refer to the timing diagrams in
Figure 11 and Figure 12.
CKPL = 0
1/f_UCxCLK
UCLK
CKPL = 1
SOMI
t_LO/HI
t_LO/HI
t_SU,MI
t_HD,MI
SIMO
t_HD,MO
t_VALID,MO
Figure 11. SPI Master Mode, CKPH = 0
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