VT8231 datasheet(5/132 Pages) ETC

5 / 132 page

VT8231

Preliminary Revision 0.8 October 29, 1999

-iii-

Table of Contents

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Function 4 Regs - Power Management, SMBus and HWM.............................................................................................. 83

PCI Configuration Space Header .......................................................................................................................................................... 83

Power Management-Specific PCI Configuration Registers .................................................................................................................. 84

Hardware-Monitor-Specific Configuration Registers ........................................................................................................................... 91

System Management Bus-Specific Configuration Registers ................................................................................................................. 91

Power Management I/O-Space Registers .............................................................................................................................................. 92

System Management Bus I/O-Space Registers.................................................................................................................................... 101

Hardware Monitor I/O Space Registers .............................................................................................................................................. 104

Function 5 & 6 Registers - AC97 Audio & Modem Codecs ............................................................................................ 108

PCI Configuration Space Header – Function 5 Audio ........................................................................................................................ 108

PCI Configuration Space Header – Function 6 Modem...................................................................................................................... 109

Function 5 & 6 Codec-Specific Configuration Registers .................................................................................................................... 110

Function 5 I/O Base 0 Regs – DXSn Scatter/Gather DMA................................................................................................................. 112

Function 5 I/O Base 1 Registers –Audio FM NMI Status................................................................................................................... 117

Function 5 I/O Base 2 Registers –MIDI / Game Port.......................................................................................................................... 117

Function 6 I/O Base 0 Regs –Modem Scatter/Gather DMA ............................................................................................................... 118

FUNCTIONAL DESCRIPTIONS ................................................................................................................................................ 120

POWER MANAGEMENT.............................................................................................................................................................. 120

Power Management Subsystem Overview .......................................................................................................................................... 120

Processor Bus States ........................................................................................................................................................................... 120

System Suspend States and Power Plane Control ............................................................................................................................... 121

General Purpose I/O Ports................................................................................................................................................................... 121

Power Management Events ................................................................................................................................................................. 122

System and Processor Resume Events ................................................................................................................................................ 122

Legacy Power Management Timers .................................................................................................................................................... 123

System Primary and Secondary Events ............................................................................................................................................... 123

Peripheral Events ................................................................................................................................................................................ 123

ELECTRICAL SPECIFICATIONS ............................................................................................................................................. 124

ABSOLUTE MAXIMUM RATINGS ............................................................................................................................................... 124

DC CHARACTERISTICS.............................................................................................................................................................. 124

OUTPUT DRIVE .......................................................................................................................................................................... 125

INPUT VOLTAGE ........................................................................................................................................................................ 125

PACKAGE MECHANICAL SPECIFICATIONS ...................................................................................................................... 126

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