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STA309B Datasheet(PDF) 26 Page - STMicroelectronics

Part # STA309B
Description  Multichannel digital audio processor with FFX짰
PDF  66 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA309B Datasheet(HTML) 26 Page - STMicroelectronics

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Registers
STA309B
26/66
Doc ID 022570 Rev 2
7.2.3
Configuration register C (0x02) - serial output formats
The STA309B 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 and PDM input,
the serial audio output acts as a master with an output sampling frequency of 176.4 kHz.
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
SAOFB
SAO3
SAO2
SAIO
SAO0
00
000
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
4RW
0
SAOFB
Determines MSB or LSB first for all SAO formats:
0: MSB first
1: LSB first
BICKI = BICKO
SAO[3:0]
Interface data format
32 * fs
0111
I2S data
1111
Left/right-justified 16-bit data
48 * fs
1110
I2S data
0001
Left-justified data
1010
Right-justified 24-bit data
1011
Right-justified 20-bit data
1100
Right-justified 18-bit data
1101
Right-justified 16-bit data
64 * fs
0000
I2S data
0001
Left-justified data
0010
Right-justified 24-bit data
0011
Right-justified 20-bit data
0100
Right-justified 18-bit data
0101
Right-justified 16-bit data



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