CS4297A Datasheet, PDF (2/52 Pages) Cirrus Logic – CrystalClear SoundFusion Audio Codec 97

CS4297A
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS .................................................................5
Analog Characteristics ........................................................................................................5
Mixer Characteristics ..........................................................................................................6
Absolute Maximum Ratings ................................................................................................6
Recommended Operating Conditions.................................................................................6
Digital Characteristics .........................................................................................................6
AC ’97 Serial Port Timing....................................................................................................7
2. GENERAL DESCRIPTION ...............................................................................................10
2.1 AC-Link ....................................................................................................................10
2.2 Control registers ......................................................................................................10
2.3 Output Mixer .............................................................................................................11
2.4 Input Mux .................................................................................................................11
2.5 Volume Control ........................................................................................................11
3. AC LINK FRAME DEFINITION .........................................................................................13
3.1 AC-Link Serial Data Output Frame ..........................................................................14
3.1.1 Serial Data Output Slot Tags (Slot 0) ...........................................................14
3.1.2 Command Address Port (Slot 1) ..................................................................15
3.1.3 Command Data Port (Slot 2) ........................................................................15
3.1.4 PCM Playback Data (Slots 3-10) .................................................................15
3.2 AC-Link Audio Input Frame ......................................................................................16
3.2.5 Serial Data Input Slot Tag Bits (Slot 0) .......................................................16
3.2.6 Status Address Port (Slot 1) .........................................................................16
3.2.7 Status Data Port (Slot 2) ..............................................................................17
3.2.8 PCM Capture Data (Slot 3-10) .....................................................................17
3.3 AC-Link Protocol Violation - Loss of SYNC ..............................................................18
4. REGISTER INTERFACE ..................................................................................................19
4.3 Reset Register (Index 00h) ......................................................................................20
4.4 Master Volume Register (Index 02h) .......................................................................20
4.5 Alternate Volume Register (Index 04h) ....................................................................21
4.6 Mono Volume Register (Index 06h) .........................................................................21
4.7 PC_BEEP Volume Register (Index 0Ah) .................................................................22
4.8 Phone Volume Register (Index 0Ch) ........................................................................22
4.9 Microphone Volume Register (Index 0Eh) ................................................................23
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