sta339bws STMicroelectronics, sta339bws Datasheet - Page 30

• Manufacturer Part Number: sta339bws
• Description: 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

Register description
6.2.2
6.2.3
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Serial data interface
The STA339BWS audio serial input was designed to interface with standard digital audio
components and to accept a number of serial data formats. STA339BWS 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 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 I
and figure that follow.
Serial data first bit
Table 18.
Table 19.
32 * fs
48 * fs
64 * fs
BICKI
SAIFB
Serial data first bit
Supported serial audio input formats for MSB-first (SAIFB = 0)
0
1
SAI [3:0]
0000
0001
0000
0001
0010
0110
1010
1110
0000
0001
0010
0110
1010
1110
MSB-first
LSB-first
2
S, MSB-first. Available formats are shown in the tables
SAIFB
0
0
0
0
0
0
0
0
0
0
0
0
0
0
I
Left/right-justified 16-bit data
I
Left-justified 16 to 24-bit data
Right-justified 24-bit data
Right-justified 20-bit data
Right-justified 18-bit data
Right-justified 16-bit data
I
Left-justified 16 to 24-bit data
Right-justified 24-bit data
Right-justified 20-bit data
Right-justified 18-bit data
Right-justified 16-bit data
2
2
2
S 15-bit data
S 16 to 23-bit data
S 16 to 24-bit data
Format
Interface format
STA339BWS