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TMS320C6474
www.ti.com
SPRS552F – OCTOBER 2008 – REVISED JULY 2010
Table 7-41. Switching Characteristics for I2C Timings
(1)
(see
Figure 7-26
)
NO.
STANDARD MODE
FAST MODE
UNIT
MIN
MAX
MIN
MAX
16
t
c(SCL)
Cycle time, SCL
10
2.5
m
s
17
t
d(SCLH-SDAL)
Delay time, SCL high to SDA low (for a
4.7
0.6
m
s
repeated START condition)
18
t
d(SDAL-SCLL)
Delay time, SDA low to SCL low (for a START
4
0.6
m
s
and a repeated START condition)
19
t
w(SCLL)
Pulse duration, SCL low
4.7
1.3
m
s
20
t
w(SCLH)
Pulse duration, SCL high
4
0.6
m
s
21
t
d(SDAV-SDLH)
Delay time, SDA valid to SCL high
250
100
ns
22
t
tw(SDLL-SDAV)
Valid time, SDA valid after SCL low (for PC
0
0
0.9
m
s
bus devices)
23
T
w(SDAH)
Pulse duration, SDA high between STOP and
4.7
1.3
m
s
START conditions
24
t
r(SDA)
Rise time, SDA
1000 20 + 0.1C
b
(1)
300
ns
25
t
r(SDL)
Rise time, SCL
1000 20 + 0.1C
b
(1)
300
ns
26
t
f(SDA)
Fall time, SDA
300 20 + 0.1C
b
(1)
300
ns
27
t
f(SCL)
Fall time, SCL
300 20 + 0.1C
b
(1)
300
ns
28
t
d(SCLH-SDAH)
Delay time, SCL high to SDA high (for STOP
4
0.6
m
s
condition)
29
C
p
Capacitance for each I2C pin
10
10
pF
(1)
C
b
= total capacitance of one bus line, in pF. If mixed with HS-mode devices, faster fall-times are allowed.
Figure 7-26. I2C Transmit Timings
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Peripheral Information and Electrical Specifications
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