參數(shù)資料
型號： EVAL-ADAU1442EBZ
廠商： Analog Devices Inc
文件頁數(shù)： 48/93頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR ADAU1442
標(biāo)準(zhǔn)包裝： 1
系列： SigmaDSP®
主要目的： 音頻，音頻處理
嵌入式： 是，DSP
已用 IC / 零件： ADAU1442
主要屬性： 單芯片多通道 28/56 位音頻 DSP
次要屬性： I²C & SPI 接口
已供物品： 電路板，線纜，說明文檔，GPIO 子板，電源
Data Sheet
ADAU1442/ADAU1445/ADAU1446
Rev. D | Page 51 of 92
Flexible Audio Routing Matrix—Output Side
Much like the input side, the output side of the flexible audio
routing matrix takes several stereo pairs, which can be asynchro-
nous, and connects them to the 12 stereo pairs that are output
from the chip on the serial output ports. The connections must
again be one-to-one, meaning that from the 20 possible stereo
pairs entering the FARM output side, only 12 can be selected to
output from the chip. This process is represented in Figure 47 as
a large gray box.
The outputs from the ASRCs are automatically connected to
both the DSP and to the FARM output sides.
Note that on the output side, unlike on the input side, the DSP
outputs are not hardwired to the output channels.
0, 1
2, 3
4, 5
6, 7
8, 9
10, 11
12, 13
14, 15
TO DSP
FROM DSP
FROM ASRCs
0, 1
2, 3
4, 5
6, 7
8, 9
10, 11
12, 13
14, 15
16, 17
18, 19
20, 21
22, 23
OUTPUT
CHANNELS
(24 CH)
0, 1
2, 3
4, 5
6, 7
8, 9
10, 11
12, 13
14, 15
16, 17
18, 19
20, 21
22, 23
FLE
X
IB
LE
A
U
D
IO
R
OU
TIN
G
M
A
TR
IX
OU
TP
U
T
S
ID
E
07696-
048
Figure 47. Flexible Audio Routing Matrix—Output Side
Automatic Output Channel Assignment
From the 24 output channels, there are nine serial output ports
available to output the data. By selecting different output modes,
the user can output the data in the desired format. After the modes
are selected for each serial output port, the output channels are
automatically assigned to sequentially corresponding serial output
ports according to the number of channels desired in the stream.
For clarification, see Figure 48.
In this example, 14 output channels must be output on three
serial output ports. To accomplish this, serial output modes must
be chosen to fit the desired system. In this case, SDATA_OUT0
is set to TDM8 mode, SDATA_OUT1 is set to I2S mode, and
SDATA_OUT2 is set to TDM4 mode. Using this information,
the automatic output channel assignment algorithm routes
Output Channels[7:0] to SDATA_OUT0, Output Channels[9:8]
to SDATA_OUT1, and Output Channels[13:10] to SDATA_OUT2.
Note that output channels must be assigned sequentially, and no
pair can be skipped. If an output channel is left empty (that is,
no data is routed to it from the ASRCs or DSP), it is still assigned
to a serial output port.
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