STA381BWS datasheet(108/171 Pages) STMICROELECTRONICS

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STA381BWS

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Doc ID 018937 Rev 6

7.2

Configuration register B (addr 0x01)

7.2.1

Serial data interface

The STA381BWS audio serial input was designed to interface with standard digital audio

components and to accept a number of serial data formats. The STA381BWS always acts

as the slave when receiving audio input from standard digital audio components. Serial data

for two channels is provided using three inputs: left/right clock LRCKI, serial clock BICKI,

and serial data 1 and 2 SDI12.

The SAI bits (D3 to D0) and the SAIFB bit (D4) are used to specify the serial data format.

The default serial data format is I2S, MSB-first. Available formats are shown in the tables

that follow.

7.2.2

Serial audio input interface format

7.2.3

Serial data first bit

C2IM

C1IM

DSCKE

SAIFB

SAI3

SAI2

SAI1

SAI0

Table 106.

Serial audio input interface

Bit

R/W

RST

Name

Description

R/W

SAI0

Determines the interface format of the input serial

digital audio interface

R/W

SAI1

R/W

SAI2

R/W

SAI3

Table 107.

Serial data first bit

SAIFB

Format

MSB-first

LSB-first

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