CS4294

DS326PP4

3

5.5 AC ’97 Reset Modes ........................................................................................................ 15

5.5.1 Cold AC ‘97 Reset .............................................................................................. 15

5.5.2 Warm AC ’97 Reset ............................................................................................ 15

5.5.3 AC ’97 Register Reset ........................................................................................ 16

5.6 AC-Link Protocol Violation - Loss of SYNC ..................................................................... 16

6. REGISTER INTERFACE ........................................................................................................ 17

6.1 Register Descriptions ......................................................................................................18

6.1.1 Reset (Index 00h) ............................................................................................... 18

6.1.2 Master Volume (Index 02h) ................................................................................. 18

6.1.3 Alternate Volume (Index 04h) ............................................................................. 19

6.1.4 Microphone Volume (Index 0Eh) ......................................................................... 19

6.1.5 Stereo Analog Mixer Input Gain (Index’s 10h - 12h, 16h - 18h)........................... 20

6.1.6 Input Mux Select (Index 1Ah)............................................................................... 20

6.1.7 Record Gain (Index 1Ch) ..................................................................................... 21

6.1.8 General Purpose (Index 20h)............................................................................... 21

6.1.9 Stereo Enhancement Control (Index 22h) ........................................................... 21

6.1.10 Power Down Control/Status (Index 26h)............................................................ 22

6.1.11 Extended Audio ID (Index 28h) ......................................................................... 23

6.1.12 Extended Audio Status/Control (Index 2Ah) ..................................................... 23

6.1.13 PCM Front DAC Rate (Index 2Ch) .................................................................. 23

6.1.14 PCM Surround DAC Rate (Index 2Eh)

........................................................... 23

6.1.15 PCM LFE DAC Rate (Index 30h)

.................................................................... 24

6.1.16 PCM LR ADC Rate (Index 32h) ......................................................................... 24

6.1.17 Center LFE Volume (Index 36h) ........................................................................ 24

6.1.18 LR Surround Volume (Index 38h) ...................................................................... 24

6.1.19 Extended Codec ID (Index 3Ch) ....................................................................... 25

6.1.20 Extended Codec Status/Control (Index 3Eh) .................................................... 25

6.1.21 Extended Audio DAC1/ADC1 Rate (Index 40h)................................................. 26

6.1.22 Extended Audio DAC2/ADC2 (Index 44h) ......................................................... 26

6.1.23 Extended Audio DAC1/ADC1 Level (Index 46h)................................................ 26

6.1.24 Extended AudioDAC2/ADC2 Level (Index 4Ah) ................................................ 26

6.1.25 GPIO Pin Configuration (Index 4Ch).................................................................. 27

6.1.26 GPIO Pin Polarity/Type Configuration (Index 4Eh)............................................ 27

6.1.27 GPIO Pin Sticky (Index 50h) .............................................................................. 27

6.1.28 GPIO Pin Wakeup Mask (Index 4Ch) ............................................................... 28

6.1.29 GPIO Pin Status (Index 54h) ............................................................................. 28

6.1.30 AC Mode Control (Index 5Eh)............................................................................ 28

6.1.31 Vendor ID1 (Index 7Ch) ..................................................................................... 29

6.1.32 Vendor ID2 (Index 7Eh) ..................................................................................... 29

7. ANALOG HARDWARE DESCRIPTION ................................................................................. 30

7.1 Line-Level Inputs ............................................................................................................. 30

7.2 Microphone Level Inputs ................................................................................................. 30

7.3 Line Level Outputs ........................................................................................................... 31

7.4 Miscellaneous Analog Signals ......................................................................................... 31

7.5 Power Supplies ................................................................................................................ 32

8. PIN DESCRIPTIONS .............................................................................................................. 33

8.1 Digital I/O Pins ................................................................................................................. 33

8.2 Analog I/O Pins ................................................................................................................ 35

8.3 Filter and Reference Pins ................................................................................................ 36

8.4 Power Supplies ................................................................................................................ 37

9. PARAMETER AND TERM DEFINITIONS .............................................................................. 38

10. REFERENCES ...................................................................................................................... 39

11. PACKAGE DIMENSIONS .................................................................................................... 40