MSP430F4796IPZ Datasheet, PDF (53/89 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F47x
MIXED SIGNAL MICROCONTROLLER
SLAS629A -- MARCH 2009 -- REVISED APRIL 2009
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
USCI (UART mode)
f_USCI
PARAMETER
USCI input clock frequency
TEST CONDITIONS
Internal: SMCLK, ACLK
External: UCLK
Duty cycle = 50% ± 10%
V_CC
MIN TYP MAX UNIT
f_SYSTEM MHz
fmax, _BITCLK
Maximum BITCLK clock frequency
(equals baudrate in MBaud)
(see Note 1)
2.2 V /3 V
2
MHz
UART receive deglitch time
t_τ
(see Note 2)
2.2 V
50 150
ns
3V
50 100
ns
NOTES: 1. The DCO wake-up time must be considered in LPM3/4 for baud rates 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 27 and Figure 28)
f_USCI
PARAMETER
USCI input clock frequency
TEST CONDITIONS
SMCLK, ACLK
Duty cycle = 50% ± 10%
V_CC
MIN MAX UNIT
f_SYSTEM MHz
t_{SU, MI}
SOMI input data setup time
2.2 V
110
ns
3V
75
ns
t_{HD, MI}
SOMI input data hold time
2.2 V
0
ns
3V
0
ns
t_{VALID, MO}
SIMO output data valid time
UCLK edge to SIMO valid,
C_L = 20 pF
2.2 V
3V
30 ns
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 29 and Figure 30)
t_{STE, LEAD}
PARAMETER
STE lead time
STE low to clock
TEST CONDITIONS
V_CC
2.2 V/3 V
MIN TYP MAX UNIT
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_{SU, SI}
SIMO input data setup time
2.2 V
20
ns
3V
15
ns
t_{HD, SI}
SIMO input data hold time
2.2 V
10
ns
3V
10
ns
t_{VALID, SO}
SOMI output data valid time
UCLK edge to SOMI valid,
C_L = 20 pF
2.2 V
3V
75 110 ns
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.
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