Figure 4. i²c mode timing, Cs8427 – Cirrus Logic CS8427 User Manual
Page 10
CS8427
10
DS477F5
SWITCHING CHARACTERISTICS - CONTROL PORT - I²C MODE
, Inputs: Logic 0 = 0 V, Logic 1 = VL+; C
L
= 20 pF.
Notes: 17. I²C protocol is supported only in VL+ = 5.0 V mode.
18. Data must be held for sufficient time to bridge the 25 ns transition time of SCL.
Parameter
Symbol Min Typ
Max
Units
SCL Clock Frequency
f
scl
-
-
100
kHz
Bus Free Time Between Transmissions
t
buf
4.7
-
-
μs
Start Condition Hold Time (prior to first clock pulse)
t
hdst
4.0
-
-
μs
Clock Low Time
t
low
4.7
-
-
μs
Clock High Time
t
high
4.0
-
-
μs
Setup Time for Repeated Start Condition
t
sust
4.7
-
-
μs
SDA Hold Time from SCL Falling
t
hdd
0
-
-
μs
SDA Setup Time to SCL Rising
t
sud
250
-
-
ns
Rise Time of Both SDA and SCL Lines
t
r
-
-
25
ns
Fall Time of Both SDA and SCL Lines
t
f
-
-
25
ns
Setup Time for Stop Condition
t
susp
4.7
-
-
μs
t buf
t hdst
t hdst
t
low
t r
t f
t
hdd
t high
t sud
t sust
t susp
Stop
Start
Start
Stop
Repeated
SDA
SCL
Figure 4. I²C Mode timing