CS4298 Datasheet, PDF (2/52 Pages) Cirrus Logic – SoundFusion Audio/Modem Codec 97 (AMC 97)

CS4298
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
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