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ALC888S

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

Realtek Semiconductor 

ALC888S & ALC888SDD

Datasheet

Table of Contents

1.

GENERAL DESCRIPTION ....................................................................................................................................1

2.

2.1.

2.2.

3.

FEATURES ...............................................................................................................................................................2

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

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

SYSTEM APPLICATIONS .....................................................................................................................................4

4.

BLOCK DIAGRAM .................................................................................................................................................5

4.1. ANALOG INPUT/OUTPUT UNIT .....................................................................................................................................6

5.

PIN ASSIGNMENTS................................................................................................................................................7

5.1. ALC888S PIN ASSIGNMENTS.......................................................................................................................................7

5.2. GREEN PACKAGE AND VERSION IDENTIFICATION ........................................................................................................7

5.3. ALC888SDD PIN ASSIGNMENTS.................................................................................................................................8

5.4. GREEN PACKAGE AND VERSION IDENTIFICATION ........................................................................................................8

6.

PIN DESCRIPTIONS ...............................................................................................................................................9

6.1. DIGITAL I/O PINS .........................................................................................................................................................9

6.2. ANALOG I/O PINS ........................................................................................................................................................9

6.3. FILTER/REFERENCE....................................................................................................................................................10

6.4. POWER/GROUND........................................................................................................................................................10

7.

HIGH DEFINITION AUDIO LINK PROTOCOL..............................................................................................11

7.1. LINK SIGNALS ............................................................................................................................................................11

7.1.1. Signal Definitions .................................................................................................................................................12

7.1.2. Signaling Topology...............................................................................................................................................13

7.2. FRAME COMPOSITION ................................................................................................................................................14

7.2.1. Outbound Frame – Single SDO............................................................................................................................14

7.2.2. Outbound Frame – Multiple SDOs.......................................................................................................................15

7.2.3. Inbound Frame – Single SDI ................................................................................................................................16

7.2.4. Inbound Frame – Multiple SDIs...........................................................................................................................17

7.2.5. Variable Sample Rates .........................................................................................................................................17

7.3. RESET AND INITIALIZATION .......................................................................................................................................20

7.3.1. Link Reset .............................................................................................................................................................20

7.3.2. Codec Reset ..........................................................................................................................................................21

7.3.3. Codec Initialization Sequence ..............................................................................................................................22

7.4. VERB AND RESPONSE FORMAT ..................................................................................................................................22

7.4.1. Command Verb Format........................................................................................................................................22

7.4.2. Response Format..................................................................................................................................................24

7.5. POWER MANAGEMENT...............................................................................................................................................25

7.5.1. System Power State Definitions............................................................................................................................25

7.5.2. Power Controls in NID 01h..................................................................................................................................26

7.5.3. Powered Down Conditions...................................................................................................................................26

8.

SUPPORTED VERBS AND PARAMETERS ......................................................................................................27

8.1. VERB – GET PARAMETERS (VERB ID=F00H).............................................................................................................27

8.1.1. Parameter – Vendor ID (Verb ID=F00h, Parameter ID=00h)............................................................................27

8.1.2. Parameter – Revision ID (Verb ID=F00h, Parameter ID=02h)..........................................................................27

8.1.3. Parameter – Subordinate Node Count (Verb ID=F00h, Parameter ID=04h) .....................................................28

7.1+2 Channel High Definition Audio Codec

iii

w/Two Independent S/PDIF-OUT

Track ID: JATR-1076-21 Rev. 1.2

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