參數(shù)資料
型號(hào): ADAU1446YSTZ-3A
廠商: Analog Devices Inc
文件頁數(shù): 44/92頁
文件大?。?/td> 0K
描述: IC SIGMADSP 175MHZ 100LQFP
標(biāo)準(zhǔn)包裝: 1
系列: SigmaDSP®
類型: 音頻處理器
應(yīng)用: 車載音頻
安裝類型: 表面貼裝
封裝/外殼: 100-LQFP
供應(yīng)商設(shè)備封裝: 100-LQFP(16x16)
包裝: 托盤
ADAU1445/ADAU1446
Rev. A | Page 49 of 92
Flexible Audio Routing Matrix—Output Side
Automatic Output Channel Assignment
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.
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 (no data
routed to it from the ASRCs or DSP), it is still assigned to a
serial output port.
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
F
L
E
X
IBL
E
AUDI
O
RO
UT
ING
M
AT
R
IX
OU
T
P
U
T
S
ID
E
07
69
6-
04
8
Figure 47. Flexible Audio Routing Matrix—Output Side
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