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STA311B Datasheet(PDF) 35 Page - STMicroelectronics

Part # STA311B
Description  Multichannel digital audio processor with FFXTM
PDF  102 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA311B Datasheet(HTML) 35 Page - STMicroelectronics

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STA311B
Registers
102
8.2.3
Configuration register C (0x02) - serial output formats
The STA311B features a serial audio output interface that consists of 8 channels. The serial
audio output always acts as a slave to the serial audio input interface and, therefore, all
output clocks are synchronous with the input clocks. The output sampling frequency (fs) is
also equivalent to the input sampling frequency. In the case of SACD/DSD input, the serial
audio output acts as a master with an output sampling frequency of 8 xfs, 4 xfs or fs
depending on SAOD4 bit. The output serial format can be selected independently from the
input format and is done via the SAO and SAOFB bits.
D7
D6
D5
D4
D3
D2
D1
D0
SAOD4
SAOFB
SAO3
SAO2
SAIO
SAO0
000
00
0
Bit
RW
RST
Name
Description
0RW
0
SAO0
Serial audio output interface format: determines the
interface format of the output serial digital audio
interface.
1RW
0
SAO1
2RW
0
SAO2
3RW
0
SAO3
Bit
RW
RST
Name
Description
4
RW
0
SAOFB
Determines MSB or LSB first for all SAO formats:
0: MSB first
1: LSB first
Bit
RW
RST
Name
Description
5
RW
0
SAOD4
Enables decimation by 4 on SAO interface for
SACD/DSD input; no effect for others.
0: div by 1
1: div by 4 (1)
1.
To avoid any aliasing on SAO streaming, a low-pass filter is needed to be implemented in one of the
available user-programmable biquads.



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