Datasheet

84
4341H–MP3–10/07
AT8xC51SND2C/MP3B
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
Protocol is as following to access DAC registers:
Audio
PA
Audio
DAC
AUDCDIN
AUDCCLK
AUDCCS
Serial Audio Interface
AUDCDOUT