alc888-vc2-gr Realtek Semiconductor Corporation, alc888-vc2-gr Datasheet - Page 20
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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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7.1.2.
The HDA controller supports two SDOs for the outbound stream, up to 15 SDIs for the inbound stream.
RST#, BCLK, SYNC, SDO0 and SDO1 are driven by controller to codecs. Each codec drives its own
point-to-point SDI signal(s) to the controller.
Figure 6 shows the possible connections between the HDA controller and codecs:
• Codec 0 is a basic connection. There is one single SDO and one single SDI for normal transmission
• Codec 1 has two SDOs for doubled outbound rate, a single SDI for normal inbound rate
• Codec 3 supports a single SDO for normal outbound rate, and two SDIs for doubled inbound rate
• Codec N has two SDOs and multiple SDIs
The multiple SDOs and multiple SDIs are used to expand the transmission rate between controller and
codecs. Section 7.2 Frame Composition, page 13 describes the detailed outbound and inbound stream
compositions for single and multiple SDOs/SDIs.
The connections shown in Figure 6 can be implemented concurrently in an HDA system. The ALC888
audio codecs are designed to receive a single SDO stream.
7.1+2 Channel High Definition Audio Codec
Controller
HDA
SDI14
SDI13
SDO1
SDO0
SYNC
BCLK
RST#
SDI2
SDI1
SDI0
.
.
.
Signaling Topology
Single SDO
Single SDI
Codec 0
Figure 6.
Two SDOs
Single SDI
Codec 1
Signaling Topology
12
.
.
.
Single SDO
Two SDIs
Codec 2
Track ID: JATR-1076-21
. . .
Multiple SDIs
Codec N
Two SDOs
Datasheet
ALC888
Rev. 1.4
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