Owner's manual

DS782F2 15
CS4349
2.8 Switching Characteristics - Control Port - SPI Format
Inputs: Logic 0 = GND; Logic 1 = VLC; C
L
=20pF.
Notes: 10. Data must be held for sufficient time to bridge the transition time of CCLK.
11. For F
SCK
< 1 MHz.
12. CDOUT should not be sampled during this time.
Figure 9. Control Port Timing - SPI Mode
Table 9. Switching Characteristics - Control Port - SPI Format
Parameter Symbol Min Max Unit
CCLK Clock Frequency f
sclk
-6MHz
RST Rising Edge to CS Falling t
srs
500 - ns
CCLK Edge to CS
Falling (Note 10) t
spi
500 - ns
CS High Time Between Transmissions t
csh
1.0 - µs
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 10) t
dh
15 - ns
Rise Time of CCLK and CDIN (Note 11) t
r2
-100ns
Fall Time of CCLK and CDIN (Note 11) t
f2
-100ns
Transition Time from CCLK to CDOUT Valid (Note 12) t
scdov
-100ns
Time from CS rising to CDOUT High-Z t
cscdo
-100ns
t
r2
t
f2
t
dsu
t
dh
t
sch
t
scl
CS
CCLK
CDIN
t
css
t
csh
t
spi
t
srs
RST
CDOUT
t
scdov
t
scdov
t
cscdo
Hi-Impedance