ALC888S 데이터 시트보기 (PDF) - Realtek Semiconductor

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ALC888S

7.1+2 CHANNEL HIGH DEFINITION AUDIO CODEC WITH TWO INDEPENDENT S/PDIF-OUT

Realtek Semiconductor 

ALC888S & ALC888SDD

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 5 shows the basic concept of the HDA link protocol.

Previous Frame

Tframe_sync = 20.833 盜 (48KHz)

Next Frame

BCLK

SYNC

Frame SYNC= 8 BCLK Stream 'A' Tag

(Here 'A' = 5)

Stream 'B' Tag

(Here 'B' = 6)

SDO

SDI

RST#

Command Stream

(40-bit data)

Stream 'A' Data

Response Stream

(36-bit data)

Stream

'C' Tag

Stream 'B' Data

Stream 'C' Data

(n bytes + 10-bit data)

Figure 5. HDA Link Protocol

7.1+2 Channel High Definition Audio Codec

11

w/Two Independent S/PDIF-OUT

Track ID: JATR-1076-21 Rev. 1.2

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