MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
45
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
USCI (I2C Mode) (see Figure 24)
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
f
USCI
USCI input clock frequency
Internal: SMCLK, ACLK
External: UCLK
Duty cycle = 50% ± 10%
f
SYSTEM
MHz
f
SCL
SCL clock frequency 2.2 V/3 V 0 400 kHz
Hold time (repeated) START
f
SCL
≤ 100 kHz 2.2 V/3 V 4.0
t
HD,STA
Hold time (repeated) START
f
SCL
> 100 kHz 2.2 V/3 V 0.6
μs
Setup time for a repeated START
f
SCL
≤ 100 kHz 2.2 V/3 V 4.7
t
SU,STA
Setup time for a repeated START
f
SCL
> 100 kHz 2.2 V/3 V 0.6
μs
t
HD,DAT
Data hold time 2.2 V/3 V 0 ns
t
SU,DAT
Data setup time 2.2 V/3 V 250 ns
t
SU,STO
Setup time for STOP 2.2 V/3 V 4.0 μs
Pulse width of spikes supressed b
2.2 V 50 150 600
t
SP
input filter
3 V 50 100 600
ns
SDA
SCL
1/f
SCL
t
HD,DAT
t
SU,DAT
t
HD,STA
t
SU,STA
t
HD,STA
t
SU,STO
t
SP
Figure 24. I2C Mode Timing
