Cirrus Logic CS4398 - Manual (Page 15)

DS568F1 15
CS4398
SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMAT
(Inputs: Logic 0 = GND, Logic 1 = VLC, C
L
= 20 pF)
10. Data must be held for sufficient time to bridge the transition time, t
fc
, of SCL.
Parameter Symbol Min Max Unit
SCL Clock Frequency f
scl
- 100 kHz
RST Rising Edge to Start t
irs
500 - ns
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 10) t
hdd
0 - µs
SDA Setup Time to SCL Rising t
sud
250 - ns
Rise Time of SCL and SDA t
rc
, t
rd
- 1 µs
Fall Time SCL and SDA t
fc
, t
fd
- 300 ns
Setup Time for Stop Condition t
susp
4.7 - µs
Acknowledge Delay from SCL Falling t
ack
300 1000 ns
t buf
t
hd st
t
l o w
t
h dd
t
hig h
t sud
S top S t a rt
S D A
S C L
t
irs
R S T
t
hd st
t
rc
t
fc
t sust
t susp
S t a rt S to p
R e p e a t e d
t
rd
t
fd
t ack
Figure 8. Control Port Timing - I²C Format