MSP430FG47x
MIXED SIGNAL MICROCONTROLLER
SLAS580D -- OCTOBER 2008 -- REVISED MARCH 2011
56
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
USCI (UART mode)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX UNIT
f
USCI
USCI input clock frequency
Internal: SMCLK, ACLK
External: UCLK
Duty cycle = 50%
10%
f
SYSTEM
MHz
fmax,
BITCLK
Maximum BITCLK clock frequency
(equals baudrate in MBaud) (see
Note 1)
2.2V /3 V
2
MHz
t
UART receive deglitch time
2.2 V
50
150
ns
t
UART receive deglitch time
(see Note NO TAG)
3 V
50
100
ns
NOTES: 1. The DCO wake-up time must be considered in LPM3/4 for baudrates above 1 MHz.
2. Pulses on the UART receive input (UCxRX) shorter than the UART receive deglitch time are suppressed.
USCI (SPI master mode) (see Figure 31 and Figure 32)
PARAMETER
TEST CONDITIONS
V
CC
MIN
MAX
UNIT
f
USCI
USCI input clock frequency
SMCLK, ACLKm
Duty cycle = 50%
10%
f
SYSTEM
MHz
t
SOMI input data setup time
2.2 V
110
ns
t
SU,MI
SOMI input data setup time
3 V
75
ns
t
SOMI input data hold time
2.2 V
0
ns
t
HD,MI
SOMI input data hold time
3 V
0
ns
t
SIMO output data valid time
UCLK edge to SIMO valid C
20 pF
2.2 V
30
ns
t
VALID,MO
SIMO output data valid time
UCLK edge to SIMO valid, C
L
= 20 pF
3 V
20
ns
NOTE:
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.
USCI (SPI slave mode) (see Figure 33 and Figure 34)
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
t
STE,DIS
STE disable time
STE high to SOMI high impedance
2.2 V/3 V
50
ns
t
SIMO inp t data set p time
2.2 V
20
ns
t
SU,SI
SIMO input data setup time
3 V
15
ns
t
SIMO inp t data hold time
2.2 V
10
ns
t
HD,SI
SIMO input data hold time
3 V
10
ns
t
SOMI o tp t data alid time
UCLK edge to SOMI valid,
2.2 V
75
110
ns
t
VALID,SO
SOMI output data valid time
UCLK edge to SOMI valid,
C
L
= 20 pF
3 V
50
75
ns
NOTE:
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 master.
Содержание MSP430FG47x
Страница 91: ......
