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STA333BW датащи(PDF) 25 Page - STMicroelectronics |
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STA333BW датащи(HTML) 25 Page - STMicroelectronics |
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25 / 67 page ![]() STA333BW Register description Doc ID 13773 Rev 3 25/67 Serial audio input interface format 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 16. Serial audio input interface Bit R/W RST Name Description 0R/W 0 SAI0 Determines the interface format of the input serial digital audio interface. 1R/W 0 SAI1 2R/W 0 SAI2 3R/W 0 SAI3 Table 17. Serial data first bit SAIFB Format 0 MSB-first 1 LSB-first Table 18. Support serial audio input formats for MSB-first (SAIFB = 0) BICKI SAI [3:0] SAIFB Interface format 32 * fs 0000 0 I2S 15-bit data 0001 0 Left / right-justified 16-bit data 48 * fs 0000 0 I2S 16 to 23-bit data 0001 0 Left-justified 16 to 24-bit data 0010 0 Right-justified 24-bit data 0110 0 Right-justified 20-bit data 1010 0 Right-justified 18-bit data 1110 0 Right-justified 16-bit data |
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