MSP430F22x2
MSP430F22x4
SLAS504G – JULY 2006 – REVISED AUGUST 2012
www.ti.com
USCI (UART Mode)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
Internal: SMCLK, ACLK
f
USCI
USCI input clock frequency
External: UCLK
f
SYSTEM
MHz
Duty cycle = 50% ± 10%
BITCLK clock frequency
f
BITCLK
2.2 V, 3 V
1
MHz
(equals baud rate in MBaud)
2.2 V
50
150
600
t
τ
UART receive deglitch time
(1)
ns
3 V
50
100
600
(1)
Pulses on the UART receive input (UCxRX) shorter than the UART receive deglitch time are suppressed. To ensure that pulses are
correctly recognized their width should exceed the maximum specification of the deglitch time.
USCI (SPI Master Mode)
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
(see
Figure 20
and
Figure 21
)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
SMCLK, ACLK
f
USCI
USCI input clock frequency
f
SYSTEM
MHz
Duty cycle = 50% ± 10%
2.2 V
110
t
SU,MI
SOMI input data setup time
ns
3 V
75
2.2 V
0
t
HD,MI
SOMI input data hold time
ns
3 V
0
2.2 V
30
UCLK edge to SIMO valid,
t
VALID,MO
SIMO output data valid time
ns
C
L
= 20 pF
3 V
20
(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.
USCI (SPI Slave Mode)
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
(see
Figure 22
and
Figure 23
)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
t
STE,LEAD
STE lead time, STE low to clock
2.2 V, 3 V
50
ns
t
STE,LAG
STE lag time, Last clock to STE high
2.2 V, 3 V
10
ns
t
STE,ACC
STE access time, STE low to SOMI data out
2.2 V, 3 V
50
ns
STE disable time, STE high to SOMI high
t
STE,DIS
2.2 V, 3 V
50
ns
impedance
2.2 V
20
t
SU,SI
SIMO input data setup time
ns
3 V
15
2.2 V
10
t
HD,SI
SIMO input data hold time
ns
3 V
10
2.2 V
75
110
UCLK edge to SOMI valid,
t
VALID,SO
SOMI output data valid time
ns
C
L
= 20 pF
3 V
50
75
(1)
f
UCxCLK
= 1/2t
LO/HI
with t
LO/HI
≥
max(t
VALID,MO(Master)
+ t
SU,SI(USCI)
, t
SU,MI(Master)
+ t
VALID,SO(USCI)
).
For the master's parameters t
SU,MI(Master)
and t
VALID,MO(Master)
refer to the SPI parameters of the attached slave.
44
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