alc888s Realtek Semiconductor Corporation, alc888s Datasheet - Page 23

• Manufacturer Part Number: alc888s
• Description: 7.1+2 Channel High Definition Audio Codec With Two Independent S/pdif-out
• Manufacturer: Realtek Semiconductor Corporation

ALC888S & ALC888SDD
Datasheet
7.2.2.
Outbound Frame – Multiple SDOs
The HDA controller allows two SDO signals to be used to stripe outbound data, completing transmission
in less time to get more bandwidth. If software determines the target codec supports multiple SDO
capability, it enables the ‘Stripe Control’ bit in the controller’s Output Stream Control Register to initiate
a specific stream (Stream ‘A’ in Figure 10) to be transmitted on multiple SDOs. In this case, the MSB of
the data stream is always carried on SDO0, the second bit on SDO1 and so forth.
SDO1 is for transmitting a striped stream. The codec does not support multiple SDOs connected to
SDO0.
To guarantee all codecs can determine their corresponding stream, the command stream is not striped. It
is always transmitted on SDO0, and copied on SDO1.
Figure 10. Striped Stream on Multiple SDOs
7.1+2 Channel High Definition Audio Codec
15
Track ID: JATR-1076-21
Rev. 1.2
w/Two Independent S/PDIF-OUT