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CS8420 Datasheet(PDF) 7 Page - Cirrus Logic

No. de pieza CS8420
Descripción Electrónicos  DIGITAL AUDIO SAMPLE RATE CONVERTER
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Fabricante Electrónico  CIRRUS [Cirrus Logic]
Página de inicio  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS8420 Datasheet(HTML) 7 Page - Cirrus Logic

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CS8420
DS245PP2
7
SWITCHING CHARACTERISTICS - SERIAL AUDIO PORTS (T
A = 25 °C; VA+ = VD+ =
5V ±5%, Inputs: Logic 0 = 0V, Logic 1 = VD+; CL = 20 pF)
Notes: 5. The active edges of ISCLK and OSCLK are programmable.
6. The polarity of ILRCK and OLRCK is programmable.
7. This delay is to prevent the previous I/OSCLK edge from being interpreted as the first one after I/OLRCK
has changed.
8. This setup time ensures that this I/OSCLK edge is interpreted as the first one after I/OLRCK has
changed.
Parameter
Symbol
Min
Typ
Max
Units
OSCLK Active Edge to SDOUT Output Valid
(Note 5)
tdpd
--
20
ns
SDIN Setup TIme Before ISCLK Active Edge
(Note 5)
tds
20
-
-
ns
SDIN Hold Time After ISCLK Active Edge
(Note 5)
tdh
20
-
-
ns
Master Mode
O/RMCK to I/OSCLK active edge delay
(Note 5)
tsmd
0-
10
ns
O/RMCK to I/OLRCK delay
(Note 6)
tlmd
0-
10
ns
I/OSCLK and I/OLRCK Duty Cycle
-
50
-
%
Slave Mode
I/OSCLK Period
tsckw
36
-
-
ns
I/OSCLK Input Low Width
tsckl
14
-
-
ns
I/OSCLK Input High Width
tsckh
14
-
-
ns
I/OSCLK Active Edge to I/OLRCK Edge
(Note 5,6,7)
tlrckd
20
-
-
ns
I/OLRCK Edge Setup Before I/OSCLK Active Edge (Note 5,6,8)
tlrcks
20
-
-
ns
sckh
sckl
sckw
t
t
t
tdpd
SDOUT
(input)
(input)
SDIN
dh
t
ds
t
lrcks
t
lrckd
t
ISCLK
OSCLK
ILRCK
OLRCK
ISCLK
OSCLK
ILRCK
OLRCK
(output)
(output)
RMCK
OMCK
(input)
t
smd
t
lmd
Figure 1. Audio Ports Master Mode Timing
Figure 2. Audio Ports Slave Mode and Data I/O
Timing


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