ALC880 datasheet(3/84 Pages) REALTEK

3 / 84 page

ALC880 Series

Datasheet

7.1 Channel High Definition Audio Codec

iii

Track ID: JATR-1076-21

Rev. 1.4

Table of Contents

General Description .................................................................................................... 1

Features ........................................................................................................................2

2.1. HARDWARE FEATURES.....................................................................................................................2

2.2. SOFTWARE FEATURES ......................................................................................................................3

System Applications .................................................................................................... 3

Block Diagram ............................................................................................................. 4

4.1. ANALOG INPUT/OUTPUT UNIT .........................................................................................................4

Pin Assignments........................................................................................................... 5

5.1. LEAD (PB)-FREE PACKAGE AND VERSION IDENTIFICATION .............................................................5

Pin Descriptions........................................................................................................... 6

6.1. DIGITAL I/O PINS .............................................................................................................................6

6.2. ANALOG I/O PINS.............................................................................................................................6

6.3. FILTER/REFERENCE ..........................................................................................................................7

6.4. POWER/GROUND ..............................................................................................................................7

High Definition Audio Link Protocol ........................................................................ 8

7.1. LINK SIGNALS ..................................................................................................................................8

7.1.1.

Signal Definitions ...................................................................................................................................................8

7.1.2.

Signaling Topology .................................................................................................................................................9

7.2. FRAME COMPOSITION.....................................................................................................................10

7.2.1.

Outbound Frame – Single SDO............................................................................................................................10

7.2.2.

Outbound Frame – Multiple SDOs.......................................................................................................................12

7.2.3.

Inbound Frame – Single SDI ................................................................................................................................13

7.2.4.

Inbound Frame – Multiple SDIs...........................................................................................................................14

7.2.5.

Variable Sample Rates..........................................................................................................................................14

7.3. RESET AND INITIALIZATION............................................................................................................16

7.3.1.

Link Reset .............................................................................................................................................................16

7.3.2.

Codec Reset ..........................................................................................................................................................18

7.3.3.

Codec Initialization Sequence ..............................................................................................................................18

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