Cirrus Logic CS5345 - Manual (Page 20)

20 DS658F4
CS5345
SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMAT
Inputs: Logic 0 = DGND = AGND = 0 V, Logic 1 = VLC, C
L
= 30 pF.
19. Data must be held for sufficient time to bridge the transition time, t
fc
, of SCL.
20. Guaranteed by design.
Parameter Symbol Min Max Unit
SCL Clock Frequency f
scl
- 100 kHz
RESET 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 19) t
hdd
0 - µs
SDA Setup time to SCL Rising t
sud
250 - ns
Rise Time of SCL and SDA (Note 20) t
rc
, t
rd
- 1 µs
Fall Time SCL and SDA (Note 20) 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
hdst
t
lo w
t
hdd
t
high
t
sud
Stop S ta rt
S D A
S C L
t
irs
R S T
t
hdst
t
rc
t
fc
t sust
t susp
S ta rt Stop
R e p e ate d
t
rd
t
fd
t
ack
Figure 5. Control Port Timing - I²C Format