Audio Codec '97 Revision 2.1

AC ‘97 Component Specification Revision 2.1
TABLE OF CONTENTS
1. INTRODUCTION ...................................................................................................................................... 12
1.1 FEATURE LIST ....................................................................................................................................... 12
1.2 AUDIO CODEC ‘97 ARCHITECTURAL OVERVIEW ..................................................................................... 13
1.3 INTEGRATING AC ‘97 INTO THE SYSTEM ................................................................................................ 14
1.4 SOFTWARE DRIVER SUPPORT AND AC ’97 CONTROLLER / AC ‘97 INTEROPERABILITY............................. 15
2. PACKAGING............................................................................................................................................. 17
2.1 48-PIN QFP PACKAGE ............................................................................................................................ 18
2.2 64-PIN QFP PACKAGE ............................................................................................................................ 20
3. PIN/SIGNAL DESCRIPTIONS ................................................................................................................. 22
3.1 DIGITAL I/O .......................................................................................................................................... 22
3.2 ANALOG I/O.......................................................................................................................................... 23
3.3 FILTER/REFERENCES.............................................................................................................................. 24
3.4 POWER AND GROUND SIGNALS .............................................................................................................. 25
4. SYSTEM USAGE....................................................................................................................................... 26
4.1 AC ‘97 CONNECTION TO THE DIGITAL AC ’97 CONTROLLER.................................................................. 26
4.2 CLOCKING............................................................................................................................................. 27
4.3 RESETTING AC ‘97................................................................................................................................ 27
5. DIGITAL INTERFACE............................................................................................................................. 28
5.1 AC-LINK DIGITAL SERIAL INTERFACE PROTOCOL................................................................................... 28
5.1.1 AC-link Audio Output Frame (SDATA_OUT)................................................................................... 29
5.1.1.1 Slot 0: TAG .............................................................................................................................................. 29
5.1.1.2 Slot 1: Command Address Port................................................................................................................. 30
5.1.1.3 Slot 2: Command Data Port ...................................................................................................................... 30
5.1.1.4 Slot 3: PCM Playback Left Channel.......................................................................................................... 31
5.1.1.5 Slot 4: PCM Playback Right Channel........................................................................................................ 31
5.1.1.6 Slot 5: Optional Modem Line 1 DAC........................................................................................................ 31
5.1.1.7 Slots 6-9: Optional PCM Center, L Surround, R Surround, and LFE DACs ................................................ 31
5.1.1.8 Slot 10: Optional Modem Line 2 DAC ...................................................................................................... 31
5.1.1.9 Slot 11: Optional Modem Headset DAC.................................................................................................... 31
5.1.1.10 Slot 12: Optional Modem GPIO control .................................................................................................... 31
5.1.2 AC-link Audio Input Frame (SDATA_IN)......................................................................................... 31
5.1.2.1 Slot 0: TAG .............................................................................................................................................. 31
5.1.2.2 Slot 1: Status Address Port ....................................................................................................................... 32
5.1.2.3 Slot 2: Status Data Port............................................................................................................................. 33
5.1.2.4 Slot 3: PCM Record Left Channel............................................................................................................. 33
5.1.2.5 Slot 4: PCM Record Right Channel........................................................................................................... 33
5.1.2.6 Slot 5: Optional Modem Line 1 ADC........................................................................................................ 33
5.1.2.7 Slot 6: Optional Dedicated Microphone Record Data................................................................................. 33
5.1.2.8 Slots 7-9: Reserved .................................................................................................................................. 33
5.1.2.9 Slot 10: Optional Modem Line 2 ADC ...................................................................................................... 34
5.1.2.10 Slot 11: Optional Modem Headset ADC.................................................................................................... 34
5.1.2.11 Slot 12: Optional Modem GPIO status ...................................................................................................... 34
5.2 AC-LINK LOW POWER MODE................................................................................................................. 34
5.2.1 Waking up the AC-link ...................................................................................................................... 34
5.2.1.1 Cold AC ‘97 Reset .................................................................................................................................... 35
5.2.1.2 Warm AC ‘97 Reset .................................................................................................................................. 35
6. AC ‘97 MIXER........................................................................................................................................... 36
6.1 MIXER OUTPUT...................................................................................................................................... 37
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May 22, 1998