CS4298

2

DS315PP2

TABLE OF CONTENTS

1. CHARACTERISTICS AND SPECIFICATIONS ........................................................................ 5

AUDIO ANALOG CHARACTERISTICS.................................................................................... 5

ABSOLUTE MAXIMUM RATINGS ........................................................................................... 6

RECOMMENDED OPERATING CONDITIONS ....................................................................... 6

MIXER CHARACTERISTICS.................................................................................................... 6

MODEM CHARACTERISTICS ................................................................................................. 7

SERIAL PORT TIMING............................................................................................................. 9

2. GENERAL DESCRIPTION ..................................................................................................... 12

2.1 Overview ........................................................................................................................... 12

2.2 Modes of Operation ..........................................................................................................12

2.2.1 Mode 0 ....................................................................................................................12

2.2.2 Mode 1 ....................................................................................................................12

2.2.3 Mode 2 ....................................................................................................................12

2.2.4 Mode 3 ....................................................................................................................12

3. DIGITAL SECTION ................................................................................................................. 13

3.1 AC-Link ............................................................................................................................. 13

3.2 Control registers................................................................................................................ 13

4. ANALOG SECTION ................................................................................................................ 14

4.1 Audio Output Mixer ........................................................................................................... 14

4.2 Audio Input Mux ................................................................................................................ 14

4.3 Audio Input Mixer .............................................................................................................. 14

4.4 Audio Volume Control ....................................................................................................... 14

5. AC ‘97 ..................................................................................................................................... 16

5.1 AC ‘97 Frame Definition.................................................................................................... 16

5.2 AC-Link Serial Data Output Frame ................................................................................... 16

5.3 AC-Link AudioOutput Frame............................................................................................. 17

5.3.1 Serial Data Output Slot Tags (Slot 0)............................................................................. 17

5.3.2 Register Address (Slot 1)............................................................................................... 17

5.3.3 Register Write Data (Slot 2) ........................................................................................... 18

5.3.4 Playback Data (Slots 3-11) ............................................................................................ 18

5.3.5 GPIO Data (Slot12)........................................................................................................18

5.4 AC-Link Audio Input Frame............................................................................................... 18

5.4.1 Serial Data Input Slot Tag Bits (Slot 0) ......................................................................... 18

5.4.2 Read-Back Address Port (Slot 1)................................................................................... 19

5.4.3 Read-Back Data Port (Slot 2) ........................................................................................ 19

5.4.4 PCM Capture Data (Slot 3-11)....................................................................................... 19

5.4.5 GPIO Pin Status (Slot 12) .............................................................................................. 19

Contacting Cirrus Logic Support

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http://www.cirrus.com/corporate/contacts/

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