STA321MPL datasheet(23/50 Pages) STMICROELECTRONICS

23 / 50 page

STA321MP

Registers

Doc ID 022647 Rev 1

23/50

7.2.2

Configuration register C (0x02) - serial output formats

The STA321MP features a serial audio output interface that consists of 8 channels.

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.

SAOFB

SAO3

SAO2

SAIO

SAO0

000

Bit

RST

Name

Description

0RW

SAO0

Serial audio output interface format: determines the

interface format of the output serial digital audio

interface.

1RW

SAO1

2RW

SAO2

3RW

SAO3

Bit

RST

Name

Description

4RW

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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