ALC665 datasheet(21/89 Pages) REALTEK

21 / 89 page

ALC665

Datasheet

5.1-Channel High Definition Audio Codec

Track ID: JATR-2265-11

Rev. 1.0

7.1.2.

Signaling Topology

The HDA controller supports two SDOs for the outbound stream, and up to 15 SDIs for the inbound

stream. RESET#, BCLK, SYNC, SDO0, and SDO1 are driven by the controller to codecs. Each codec

drives its own point-to-point SDI signal(s) to the controller.

Figure 5, on page 11, 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, and 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 12, describes the detailed outbound and inbound stream

compositions for single and multiple SDOs/SDIs.

The connections shown in Figure 5 can be implemented concurrently in an HDA system. The ALC665 is

designed to receive a single SDO stream.

Codec 0

Codec 1

Codec 2

HDA

Controller

RST#

BCLK

SYNC

SDO0

SDO1

SDI0

SDI2

SDI14

Codec N

SDI1

SDI13

. . .

Single SDO

Single SDI

Two SDOs

Single SDI

Single SDO

Two SDIs

Two SDOs

Multiple SDIs

Figure 5.

Signaling Topology

ALC665 Datasheet(PDF) 21 Page - Realtek Semiconductor Corp.

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