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AT83SND2CMP3 датащи(PDF) 23 Page - ATMEL Corporation |
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AT83SND2CMP3 датащи(HTML) 23 Page - ATMEL Corporation |
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23 / 97 page ![]() 23 AT83SND2CMP3 7524B–MP3–05/06 Figure 21. 20 bit I2S justified mode Figure 22. 20 bit MSB justified mode Figure 23. 20 bit LSB justified mode The selection between modes is done using the DINTSEL 1:0 in DAC_MISC register (Table 40.) according with the following table: The data interface always works in slave mode. This means that the DSEL and the DCLK signals are provided by microcontroller audio data interface. Serial Audio DAC Interface The serial audio DAC interface is a Synchronous Peripheral Interface (SPI) in slave mode: • AUDCDIN: is used to transfer data in series from the master to the slave DAC. It is driven by the master. • AUDCDOUT: is used to transfer data in series from the slave DAC to the master. It is driven by the selected slave DAC. • Serial Clock (AUDCCLK): it is used to synchronize the data transmission both in and out the devices through the AUDCDIN and AUDCDOUT lines. Note: Refer to Table 29. for DAC SPI Interface Description R1 R0 L(N-1) L(N-2) L(N-3) ... L2 L1 L0 R(N-1) R(N-2) R(N-3) ... R2 R1 R0 SCLK DSEL DOUT R0 L(N-1) L(N-2) L(N-3) ... L2 L1 L0 R(N-1) R(N-2) R(N-3) ... R2 R1 R0 L(N-1) SCLK DSEL DOUT R0 L(N-1) L(N-2) ... L1 L0 R(N-1) R(N-2) ... R1 R0 L(N-1) SCLK DSEL DOUT DINTSEL 1:0 Format 00 I2S Justified 01 MSB Justified 1x LSB Justified |
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