Product specifications

VT8235 V-Link South Bridge
Revision 1.22 October 24, 2002 -iii- Table Of Contents
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