CS4351
SWITCHING CHARACTERISTICS - CONTROL PORT - I2C FORMAT
(Inputs: Logic 0 = GND, Logic 1 = VL, C = 20 pF)
L
Parameter
Symbol
Min
Max
Unit
SCL Clock Frequency
f
-
100
kHz
scl
RST Rising Edge to Start
t
500
4.7
4.0
4.7
4.0
4.7
0
-
ns
µs
µs
µs
µs
µs
µs
ns
µs
ns
µs
ns
irs
Bus Free Time Between Transmissions
Start Condition Hold Time (prior to first clock pulse)
Clock Low time
t
-
buf
t
-
hdst
t
-
low
Clock High Time
t
-
high
Setup Time for Repeated Start Condition
SDA Hold Time from SCL Falling
SDA Setup time to SCL Rising
Rise Time of SCL and SDA
t
-
sust
(Note 7)
t
-
hdd
t
250
-
-
1
sud
t , t
rc rc
Fall Time SCL and SDA
t , t
-
300
-
fc fc
Setup Time for Stop Condition
Acknowledge Delay from SCL Falling
t
4.7
300
susp
t
1000
ack
Notes: 7. Data must be held for sufficient time to bridge the transition time, t , of SCL.
fc
R S T
t
irs
R e p e a te d
Stop
S ta rt
Stop
S ta rt
t
t
rd
fd
S D A
S C L
t
t
t
t
t
buf
t
high
hdst
fc
susp
hdst
lo w
t
t
t
t
t
t
sust
sud
ack
rc
hdd
2
Figure 2. Control Port Timing - I C Format
12
DS566PP2
CIRRUS [ CIRRUS LOGIC ]
