MSP430F249-EP_14 Datasheet, PDF (51/82 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F249-EP
MIXED SIGNAL MICROCONTROLLER
2008
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
USCI (I²C mode) (see Figure 31)
PARAMETER
TEST CONDITIONS
f_USCI
USCI input clock frequency
Internal: SMCLK, ACLK
External: UCLK
Duty cycle = 50% ± 10%
f_SCL
t_HD,STA
t_SU,STA
t_HD,DAT
t_SU,DAT
t_SU,STO
SCL clock frequency
Hold time (repeated) START
Setup time for a repeated START
Data hold time
Data setup time
Setup time for STOP
f_SCL ≤ 100kHz
f_SCL > 100kHz
f_SCL ≤ 100kHz
f_SCL > 100kHz
Pulse width of spikes suppressed by
t_SP
input filter
VCC
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V
3V
tHD,STA
tSU,STA tHD,STA
MIN TYP
MAX UNIT
f_SYSTEM MHz
0
4.0
0.6
4.7
0.6
0
250
4.0
50 150
50 100
400 kHz
μs
μs
ns
ns
μs
600
ns
600
SDA
1/fSCL
tSP
SCL
tHD,DAT
tSU,DAT
Figure 31. I²C Mode Timing
tSU,STO
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