SDA
SCL
t
HD,DAT
t
SU,DAT
t
HD,STA
t
HIGH
t
LOW
t
BUF
t
HD,STA
t
SU,STA
t
SP
t
SU,STO
85
SLAS826F – MARCH 2015 – REVISED MARCH 2017
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Specifications
Copyright © 2015–2017, Texas Instruments Incorporated
lists the supported clock frequencies of the eUSCI in I
2
C mode.
Table 5-40. eUSCI (I
2
C Mode) Clock Frequency
PARAMETER
TEST CONDITIONS
V
CORE
V
CC
MIN
MAX UNIT
f
eUSCI
eUSCI input clock
frequency
Internal: SMCLK,
External: UCLK,
Duty cycle = 50% ±10%
1.2 V
12
MHz
1.4 V
24
f
SCL
SCL clock frequency
1
MHz
lists the characteristics of the eUSCI in I
2
C mode.
Table 5-41. eUSCI (I
2
C Mode)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
t
HD,STA
Hold time (repeated) START
f
SCL
= 100 kHz
5.5
µs
f
SCL
= 400 kHz
1.5
f
SCL
= 1 MHz
0.6
t
SU,STA
Setup time for a repeated START
f
SCL
= 100 kHz
5.5
µs
f
SCL
= 400 kHz
1.5
f
SCL
= 1 MHz
0.6
t
HD,DAT
Data hold time
f
SCL
= 100 kHz
80
ns
f
SCL
= 400 kHz
80
f
SCL
= 1 MHz
80
t
SU,DAT
Data setup time
f
SCL
= 100 kHz
5.5
µs
f
SCL
= 400 kHz
1.5
f
SCL
= 1 MHz
0.6
t
SU,STO
Setup time for STOP
f
SCL
= 100 kHz
5.5
µs
f
SCL
= 400 kHz
1.5
f
SCL
= 1 MHz
0.6
t
SP
Pulse duration of spikes suppressed by input filter
UCGLITx = 0
50
120
ns
UCGLITx = 1
25
60
UCGLITx = 2
10
35
UCGLITx = 3
5
20
t
TIMEOUT
Clock low time-out
UCCLTOx = 1
27
ms
UCCLTOx = 2
30
UCCLTOx = 3
33
Figure 5-73. I
2
C Mode Timing