VT8235 datasheet(5/145 Pages) VIA

5 / 145 page

VT8235 V-Link South Bridge

Revision 1.22 October 24, 2002

-iii-

Table Of Contents

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SMB GPIO Slave Command Codes...................................................................................................................................................... 79

General Purpose I/O Control Registers ................................................................................................................................................. 80

Power Management I/O-Space Registers .............................................................................................................................................. 81

System Management Bus I/O-Space Registers ..................................................................................................................................... 90

Device 17 Function 1 Registers - Enhanced IDE Controller ............................................................................................. 93

PCI Configuration Space Header .......................................................................................................................................................... 93

IDE-Controller-Specific Configuration Registers ................................................................................................................................. 95

IDE Power Management Registers........................................................................................................................................................ 99

IDE Back Door Registers ...................................................................................................................................................................... 99

IDE Revision ID.................................................................................................................................................................................... 99

IDE I/O Registers .................................................................................................................................................................................. 99

Device 17 Function 5 Registers - AC97 Audio Controller ............................................................................................... 100

PCI Configuration Space Header ........................................................................................................................................................ 100

Audio-Specific PCI Configuration Registers ...................................................................................................................................... 101

I/O Base 0 Regs – Audio Scatter / Gather DMA................................................................................................................................. 103

Device 17 Function 6 Registers - AC97 Modem Controller ............................................................................................ 112

PCI Configuration Space Header ........................................................................................................................................................ 112

Modem-Specific PCI Configuration Registers .................................................................................................................................... 113

I/O Base 0 Regs – Modem Scatter / Gather DMA .............................................................................................................................. 115

Device 18 Function 0 Registers - LAN .............................................................................................................................. 118

PCI Configuration Space Header ........................................................................................................................................................ 118

LAN-Specific PCI Configuration Registers ........................................................................................................................................ 118

LAN I/O Registers .............................................................................................................................................................................. 120

FUNCTIONAL DESCRIPTIONS ................................................................................................................................................ 132

POWER MANAGEMENT.............................................................................................................................................................. 132

Power Management Subsystem Overview .......................................................................................................................................... 132

Processor Bus States............................................................................................................................................................................ 132

System Suspend States and Power Plane Control ............................................................................................................................... 133

General Purpose I/O Ports................................................................................................................................................................... 133

Power Management Events ................................................................................................................................................................. 134

System and Processor Resume Events ................................................................................................................................................ 134

Legacy Power Management Timers .................................................................................................................................................... 135

System Primary and Secondary Events ............................................................................................................................................... 135

Peripheral Events ................................................................................................................................................................................ 135

ELECTRICAL SPECIFICATIONS............................................................................................................................................. 136

ABSOLUTE MAXIMUM RATINGS................................................................................................................................................ 136

DC CHARACTERISTICS.............................................................................................................................................................. 136

REGISTER BITS POWERED BY VBAT........................................................................................................................................ 137

REGISTER BITS POWERED BY VSUS25..................................................................................................................................... 137

POWER REQUIREMENTS ............................................................................................................................................................ 138

PACKAGE MECHANICAL SPECIFICATIONS ...................................................................................................................... 139

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