STA335BW
Register description
5.2
Configuration register B (address 0x01)
D7
D6
D5
D4
D3
D2
D1
D0
C2IM
1
C1IM
0
DSCKE
0
SAIFB
0
SAI3
0
SAI2
0
SAI1
0
SAI0
0
5.2.1
Serial audio input interface format
Bit
R/W
RST
Name
Description
0
1
2
3
R/W
R/W
R/W
R/W
0
0
0
0
SAI0
SAI1
SAI2
SAI3
Determines the interface format of the input serial
digital audio interface.
5.2.2
Serial data interface
The STA335BW audio serial input was designed to interface with standard digital audio
components and to accept a number of serial data formats. STA335BW always acts a 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 register (configuration register B - 0x01, bits D3 to D0) and the SAIFB register
(configuration register B - 0x01, bit D4) are used to specify the serial data format. The
2
default serial data format is I S, MSB-first. Available formats are shown in the tables and
figure that follow.
5.2.3
Serial data first bit
SAIFB
Format
0
1
MSB-First
LSB-First
Table 10. Support serial audio input formats for MSB-first (SAIFB = 0)
BICKI
SAI (3...0)
SAIFB
Interface Format
0000
0001
0
0
I2S 15-bit data
Left/right-justified 16-bit data
32fs
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