AT83SND2CMP3B_14 Datasheet, PDF (84/242 Pages) ATMEL Corporation – MPEG I/II-Layer 3 Hardwired Decoder

15.1.3
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 15-11. for DAC SPI Interface Description
Figure 15-6. Serial Audio Interface
Audio
DAC
Audio
PA
AUDCDIN
AUDCDOUT
AUDCCLK
AUDCCS
Protocol is as following to access DAC registers:
84 AT8xC51SND2C/MP3B
4341H–MP3–10/07