STA333BW_11 Datasheet, PDF (25/67 Pages) STMicroelectronics – 2.1-channel 40-watt high-efficiency digital audio system Sound Terminal®

STA333BW
Register description
Serial audio input interface format
Table 16. Serial audio input interface
Bit R/W RST
Name
Description
0
R/W
0
1
R/W
0
2
R/W
0
3
R/W
0
SAI0
SAI1
SAI2
SAI3
Determines the interface format of the input serial
digital audio interface.
Serial data interface
The STA333BW audio serial input interfaces with standard digital audio components and
accepts a number of serial data formats. STA333BW always acts as 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 SDI.
Bits SAI and bit SAIFB are used to specify the serial data format. The default serial data
format is I²S, MSB first. Available formats are shown in the tables and figure that follow.
Serial data first bit
Table 17. Serial data first bit
SAIFB
0
MSB-first
1
LSB-first
Format
Table 18. Support serial audio input formats for MSB-first (SAIFB = 0)
BICKI
SAI [3:0]
SAIFB
Interface format
32 * fs
0000
0
0001
0
0000
0
I²S 15-bit data
Left / right-justified 16-bit data
I²S 16 to 23-bit data
0001
0
Left-justified 16 to 24-bit data
48 * fs
0010
0
0110
0
Right-justified 24-bit data
Right-justified 20-bit data
1010
0
Right-justified 18-bit data
1110
0
Right-justified 16-bit data
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