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CS8420 Datasheet(PDF) 25 Page - Cirrus Logic

Part # CS8420
Description  DIGITAL AUDIO SAMPLE RATE CONVERTER
PDF  80 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS8420 Datasheet(HTML) 25 Page - Cirrus Logic

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CS8420
DS245PP2
25
run at a frame rate of Fsi/2, and the serial audio out-
put port will run at Fsi. Identical data will appear in
both left and right data fields on the SDOUT pin.
For the serial audio input port to AES3 transmitter
data flow, in transmitter mono mode, then the input
port will run at Fso audio sample rate, while the
AES3 transmitter frame rate will be at Fso/2. The
data from either consecutive left, or right, positions
will be selected for transmitting in A and B sub-
frames.
SRC
AES3
Receiver
AES3
Transmitter
PLL
In
Out
AA
A
A
BB
B
B
96kHz stereo
96kHz frame rate
256x96kHz
96kHz stereo
96kHz frame rate
96kHz
Fsi
96kHz
Fso
OMCK (256, 384, or 512x 96kHz)
SRC
AES3
Receiver
AES3
Transmitter
PLL (x2)
In
Out
AA
A
A
BB
B
B
96kHz mono
48kHz frame rate
256x96kHz
96kHz mono
48kHz frame rate
96kHz
Fsi
96kHz
Fso
OMCK (256, 384, or 512x 96kHz)
*
+
A & B sub-frames data are time-multiplexed
into consecutive samples
Consecutive samples are alternately routed
to A& Bsub-fames
*+
RECEIVER
MONO MODE
RECEIVER
STEREO MODE
MMTLR
TRANSMITTER
STEREO MODE
TRANSMITTER
MONO MODE
A1
B1
Outgoing
AES3
SRC Aout
SRC Bout
A1
B1
A2
B2
STEREO
MONO
Frame
A2
B2
Outgoing
AES3
A selected
Outgoing
AES3
B selected
A1
A2
B1
B2
Frame
TRANSMITTER TIMING
Figure 23. Mono Mode Operation Compared to Normal Stereo Operation
A1
B1
A2
B2
Incoming
AES3
SRC Ain
SRC Bin
Ain & Bin
SRC
A1
A1
B1
B1
A2
B2
A2
B2
STEREO
MONO
Frame
RECEIVER TIMING



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