Register description
STA333BWQS
6.2
Configuration register B (0x01)
6.2.1
6.2.2
6.2.3
D7
C2IM
1
D6
C1IM
0
D5
DSCKE
0
D4
SAIFB
0
D3
SAI3
0
D2
SAI2
0
D1
SAI1
0
D0
SAI0
0
Serial audio input interface format
Table 17. Serial audio input interface format
Bit R/W RST
Name
Description
0
R/W
0
SAI0
1
R/W
0
2
R/W
0
3
R/W
0
SAI1
SAI2
SAI3
Determines the interface format of the input serial
digital audio interface.
Serial data interface
The STA333BWQS audio serial input was designed to interface with standard digital audio
components and to accept a number of serial data formats. STA333BWQS 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
default serial data format is I2S, MSB-first. Available formats are shown in the tables and
figure that follow.
Serial data first bit
Table 18. Serial data first bit
SAIFB
0
MSB-first
1
LSB-first
Format
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