Cirrus Logic CS4245 - Manual (Page 28)

28 DS656F3
CS4245
SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT
Inputs: Logic 0 = DGND = AGND = 0 V, Logic 1 = VLC, C
L
= 30 pF.
32. Data must be held for sufficient time to bridge the transition time of CCLK.
33. For f
sck
<1 MHz.
Parameter Symbol Min Max Units
CCLK Clock Frequency f
sck
- 6.0 MHz
RESET Rising Edge to CS Falling t
srs
500 - ns
CS High Time Between Transmissions t
csh
1.0 -  s
CS Falling to CCLK Edge t
css
20 - ns
CCLK Low Time t
scl
66 - ns
CCLK High Time t
sch
66 - ns
CDIN to CCLK Rising Setup Time t
dsu
40 - ns
CCLK Rising to DATA Hold Time (Note 32) t
dh
15 - ns
CCLK Falling to CDOUT Stable t
pd
- 50 ns
Rise Time of CDOUT t
r1
- 25 ns
Fall Time of CDOUT t
f1
- 25 ns
Rise Time of CCLK and CDIN (Note 33) t
r2
- 100 ns
Fall Time of CCLK and CDIN (Note 33) t
f2
- 100 ns
t r2 t f2
t dsu
t dh
t sch t scl
CS
CCLK
CDIN
t css
t pd
CDOUT
tcsh
RST t srs
Figure 11. Control Port Timing - SPI Format