Figure 4. i·c mode timing, Figure 4.i²c mode timing, Mode – Cirrus Logic CS8420 User Manual
Page 11
DS245F4
11
CS8420
SWITCHING CHARACTERISTICS - CONTROL PORT - I²C
®
MODE
Inputs: Logic 0 = 0 V, Logic 1 = VD+; C
L
= 20 pF.
16. 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
fscl
-
-
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