CS4202
4.5 Phone Volume Register (Index 0Ch) ................................................................................ 23
4.6 Microphone Volume Register (Index 0Eh)........................................................................ 24
4.7 Analog Mixer Input Gain Registers (Index 10h - 18h) ...................................................... 25
4.8 Input Mux Select Register (Index 1Ah) ............................................................................. 26
4.9 Record Gain Register (Index 1Ch) ................................................................................... 27
4.10 General Purpose Register (Index 20h) ......................................................................... 28
4.11 Powerdown Control/Status Register (Index 26h) ........................................................... 29
4.12 Extended Audio ID Register (Index 28h) ........................................................................ 30
4.13 Extended Audio Status/Control Register (Index 2Ah) .................................................... 31
4.14 Audio Sample Rate Control Registers (Index 2Ch - 32h) ............................................... 32
4.15 S/PDIF Control Register (Index 3Ah) ............................................................................. 33
4.16 Extended Modem ID Register (Index 3Ch) .................................................................... 34
4.17 Extended Modem Status/Control Register (Index 3Eh) ................................................. 34
4.18 GPIO Pin Configuration Register (Index 4Ch) ................................................................ 34
4.19 GPIO Pin Polarity/Type Configuration Register (Index 4Eh) .......................................... 35
4.20 GPIO Pin Sticky Register (Index 50h) ............................................................................ 35
4.21 GPIO Pin Wakeup Mask Register (Index 52h) ............................................................... 36
4.22 GPIO Pin Status Register (Index 54h)............................................................................ 36
4.23 AC Mode Control Register (Index 5Eh) .......................................................................... 36
4.24 Misc. Crystal Control Register (Index 60h) ..................................................................... 38
4.25 Serial Port Control Register (Index 6Ah) ........................................................................ 39
4.26 BIOS-Driver Interface Control Registers (Index 70h - 72h) ............................................ 40
4.27 BIOS-Driver Interface Status Register (Index 7Ah) ........................................................ 40
4.28 Vendor ID1 Register (Index 7Ch) ................................................................................... 41
4.29 Vendor ID2 Register (Index 7Eh) ................................................................................... 41
5. SERIAL DATA PORTS ........................................................................................................... 42
5.1 Overview .......................................................................................................................... 42
5.2 Multi-Channel Expansion ................................................................................................. 42
5.3 Serial Data Formats ......................................................................................................... 43
6. SONY/PHILIPS DIGITAL INTERFACE (S/PDIF) ................................................................... 44
7. EXCLUSIVE FUNCTIONS ...................................................................................................... 44
8. POWER MANAGEMENT ....................................................................................................... 45
8.1 AC ’97 Reset Modes ........................................................................................................ 45
8.1.1 Cold Reset .......................................................................................................... 45
8.1.2 Warm Reset ........................................................................................................ 45
8.1.3 New Warm Reset ................................................................................................ 45
8.1.4 Register Reset .................................................................................................... 45
8.2 Powerdown Controls ....................................................................................................... 46
9. CLOCKING ............................................................................................................................. 48
9.1 PLL Operation (External Clock) ....................................................................................... 48
9.2 24.576 MHz Crystal Operation ........................................................................................ 48
9.3 Secondary Codec Operation ........................................................................................... 48
10. ANALOG HARDWARE DESCRIPTION ............................................................................... 50
10.1 Analog Inputs ................................................................................................................. 50
10.1.1 Line Inputs ........................................................................................................ 50
10.1.2 CD Input ............................................................................................................ 50
10.1.3 Microphone Inputs ............................................................................................ 50
10.1.4 PC Beep Input ................................................................................................... 51
10.1.5 Phone Input ....................................................................................................... 51
10.2 Analog Outputs .............................................................................................................. 51
10.2.1 Stereo Outputs .................................................................................................. 51
10.2.2 Mono Output ..................................................................................................... 52
10.3 Miscellaneous Analog Signals ....................................................................................... 52
10.4 Power Supplies .............................................................................................................. 52
DS549PP1
3
CIRRUS [ CIRRUS LOGIC ]
