alc888-vc2-gr Realtek Semiconductor Corporation, alc888-vc2-gr Datasheet - Page 18
alc888-vc2-gr
Manufacturer Part Number
alc888-vc2-gr
Description
7.1+2 Channel High Definition Audio Codec
Manufacturer
Realtek Semiconductor Corporation
Datasheet
1.ALC888-VC2-GR.pdf
(80 pages)
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ALC888
Datasheet
7.
High Definition Audio Link Protocol
7.1.
Link Signals
The High Definition Audio (HDA) link is the digital serial interface that connects the HDA codecs to the
HDA Controller. The HDA link protocol is controller synchronous, based on a 24.0MHz BIT-CLK sent
by the HDA controller. The input and output streams, including command and PCM data, are isochronous
with a 48kHz frame rate. Figure 4 shows the basic concept of the HDA link protocol.
T
= 20.833 盜 (48KHz)
Previous Frame
frame_sync
Next Frame
BCLK
Frame SYNC= 8 BCLK
Stream 'A' Tag
Stream 'B' Tag
(Here 'A' = 5)
(Here 'B' = 6)
SYNC
SDO
Command Stream
Stream 'B' Data
Stream 'A' Data
(40-bit data)
Stream
SDI
Stream 'C' Data
Response Stream
'C' Tag
(36-bit data)
(n bytes + 10-bit data)
RST#
Figure 4.
HDA Link Protocol
7.1+2 Channel High Definition Audio Codec
10
Track ID: JATR-1076-21
Rev. 1.4
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