CDB4385 Ver la hoja de datos (PDF) - Cirrus Logic
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CDB4385 Datasheet PDF : 55 Pages
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CS4385
SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT
Inputs: Logic 0 = GND, Logic 1 = VLC, CL = 20 pF.
Parameter
Symbol
Min
Max
CCLK Clock Frequency
RST Rising Edge to CS Falling
CCLK Edge to CS Falling
CS High Time Between Transmissions
CS Falling to CCLK Edge
CCLK Low Time
CCLK High Time
CDIN to CCLK Rising Setup Time
CCLK Rising to DATA Hold Time
Rise Time of CCLK and CDIN
Fall Time of CCLK and CDIN
fsclk
-
6
tsrs
500
-
(Note 19)
tspi
500
-
tcsh
1.0
-
tcss
20
-
tscl
66
-
tsch
66
-
tdsu
40
-
(Note 20)
tdh
15
-
(Note 21)
tr2
-
100
(Note 21)
tf2
-
100
Unit
MHz
ns
ns
µs
ns
ns
ns
ns
ns
ns
ns
Notes:
19. tspi is only needed before first falling edge of CS after RST rising edge. tspi = 0 at all other times.
20. Data must be held for sufficient time to bridge the transition time of CCLK.
21. For FSCK < 1 MHz.
RST
t srs
CS
CCLK
CDIN
t spi t css
t scl t sch
t r2
t f2
t dsu t dh
Figure 6. Control Port Timing - SPI Format
t csh
18
DS671F2
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