Cirrus Logic CS8427 - Manual (Page 10)

CS8427
10 DS477F5
SWITCHING CHARACTERISTICS - CONTROL PORT - I²C MODE
Note 17 , 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 (Note 18) 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