Datasheet

MSP430F5438A, MSP430F5437A, MSP430F5436A, MSP430F5435A
MSP430F5419A, MSP430F5418A
www.ti.com SLAS655D –JANUARY 2010–REVISED AUGUST 2013
USCI (SPI Master Mode) Recommended Operating Conditions
PARAMETER CONDITIONS V
CC
MIN TYP MAX UNIT
Internal: SMCLK, ACLK
f
USCI
USCI input clock frequency f
SYSTEM
MHz
Duty cycle = 50% ± 10%
USCI (SPI Master Mode)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
(see Note
(1)
, Figure 12 and Figure 13)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
SMCLK, ACLK,
f
USCI
USCI input clock frequency f
SYSTEM
MHz
Duty cycle = 50% ± 10%
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
1.8 V 20
UCLK edge to SIMO valid,
ns
C
L
= 20 pF, PMMCOREV = 0
3.0 V 18
t
VALID,MO
SIMO output data valid time
(2)
2.4 V 16
UCLK edge to SIMO valid,
ns
C
L
= 20 pF, PMMCOREV = 3
3.0 V 15
1.8 V -10
C
L
= 20 pF, PMMCOREV = 0 ns
3.0 V -8
t
HD,MO
SIMO output data hold time
(3)
2.4 V -10
C
L
= 20 pF, PMMCOREV = 3 ns
3.0 V -8
(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)
, see 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. See the timing diagrams
in Figure 12 and Figure 13.
(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. See the timing diagrams in
Figure 12 and Figure 13.
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